Dieffenbachia plant pronounced (deef-en-BOK-ee-uh) known also as the “Dumb Cane” makes an excellent tropical houseplant. “Dieffs” tolerance of shade makes them a good plant to begin learning the basics of indoor houseplant care.
In this article, we share tips on common indoor Dieffenbachia plant care along with, answers to some of the most common questions on “dumb cane” regarding:
- How poisonous is the dumb cane plant for cats, dogs, and children?
- How to on propagation
- What to do when plants get too tall
- Leaves turning yellow
- and much more
Let’s get started!
Why Is Dieffenbachia Called “Dumb Cane”?
The common name for Dieffenbachia is “dumb cane.”
Through the years the plant has also been known as the mother-in-law tongue (the common name used for Sansevieria aka “snake plant”) referring to the toxic sap with calcium oxalate crystals, which inflame the tongue and throat causing temporary loss of speech if ingested.
It’s been reported that slaves were given “dumb cane” as a form of punishment (more below). [source]
Where Did The Name “Dieffenbachia” Come From?
The name Dieffenbachia was given to the genus by Heinrich Wilhelm Schott the director of the Botanical Gardens in Vienna to honor the head gardener Joseph Dieffenbach (1796–1863).
Schott was a botanist well known for his extensive work on the aroids (Family: Araceae). [source]
The herbaceous perennial amoena plant originates from the New World tropics rainforests of Mexico to Argentina and the West Indies.
The plant has alternate simple leaves with white flecks or spots attached to straight stems. The native origin provides some idea of the type of care and conditions the plant likes.
Are Dieffenbachia Plants Poisonous To Cats And Dogs?
The ASPCA list Dieffenbachia cats and dog toxic.
What are the signs of Dieffenbachia poisoning?
- Burning and irritation of tongue, mouth, and lips
- Oral irritation
- Difficulty swallowing
- Excessive drooling
The calcium oxalate crystals in the stems and sap of many plants including the dumb cane are the irritant.
The oxalate crystals have a needle shape and come packaged in bundles called raphides. When damaged, the crystals are released embed themselves in the areas like the oral cavity.
Rinse the mouth with milk or water. [source]
What part of dieffenbachia is poisonous? According to Medline all parts of the plant – the leaves, stems, roots, and flower. [source]
Is Dumb Cane Toxic And Dangerous To Humans?
When working with spotted dumb cane follow the below advice:
- Keep pets, and children away from the plant – touching or chewing on it
- Avoid contact with the “juices” or sap
- Wear long sleeve shirt and gloves when handling Dieffenbachia plants
- Wash your hands after working with or doing any dumb cane care
- Avoid touching your mouth or lips during and after handling plants
As shared from The Children’s Hospital of Philadelphia:
“Oxalate crystals can cause intense pain and swelling if they come in contact with the skin or mouth. When any part of these plants is chewed and swallowed, the crystals stab the sensitive tissues of the tongue, gums, and throat, creating the sensation of biting into ground glass. Pain, difficulty swallowing, swelling and temporary hoarseness may occur.”
The intense mouth pain usually stops children from eating or swallowing any large quantity of an oxalate-containing plant, making poisoning rare.
Treatment And Remedies
If you or a child eats or comes in contact with any part of a plant containing oxalate, wipe out the plant residue from the mouth. Have them drink a cool beverage or eat a snack like a popsicle, applesauce or yogurt.
If swelling prevents an adult or child from taking anything by mouth or experiences breathing difficulty, go immediately to the nearest emergency room.
“When the juices of the plant come in contact with the skin, burning, pain, and swelling may occur. Lather the exposed area repeatedly with soap and rinse with warm running water to ease the irritation. If the pain continues, contact your child’s physician.” [source]
Does The Dieffenbachia Flower?
After flowering, the center of the Dumb Canes stem “dies” but side shoots usually form, and the plant continues to grow. As the side shoots mature they can be removed, propagated and planted to produce new plants.
What Is Dieffenbachia Amoena?
Dieffenbachia Amoena is the plant most people commonly know of all Dieffenbachia plant varieties.
It is one of the taller Dieffenbachia varieties growing to heights of around 4 or 5 feet as large single stem specimens and floor plants.
The thick-stems support long, dark green mottled foliage, pointed oblong leaves which ascend spirally around the canes.
A sport known as Dieffenbachia ‘Tropic Snow’ has been grown and sold as a common indoor house plant for decades.
The World Checklist Of Selected Plant Families at Kew Gardens currently lists 56 “accepted names” dating all the way back to Dieffenbachia seguine in 1832. There have been additions and Dieffenbachia discoveries in the last 30 years by Croat at the Missouri Botanical Gardens and others.
Interestingly, as popular as Dieffenbachia Amoena is, the plant IS NOT an “accepted” species.
How Do You Care For Dieffenbachia?
The Dieffenbachia is a hardy plant and will reward you with a long lifespan if properly cared for.
In terms of difficulty and its requirements, it is one of the easiest indoor houseplants you’ll ever have the pleasure of caring for and maintaining. It grows no matter the month or season.
How Big Does Dieffenbachia Get?
The answer to plant size depends on the variety.
Dieffenbachia has given us a long list of handsome available foliage plants with dozens of named species, variants, and hybrids. The list grows as more varieties appear each year.
The larger varieties like Dieffenbachia amoena ‘Tropic Snow” grow 4 – 5 feet tall and can easily be 48” inches in width. This requires the plant be planted in larger pots (14” inches or more) for the plant to not become too top heavy.
The large varieties make perfect additions for indoor spaces with lots of room.
The smaller almost dwarf Dieffenbachia varieties like ‘Compacta’ as the name implies grows to only 24” – 28” when mature.
The one difference is the smaller varieties have a tendency to sucker heavily producing a very bushy plant. They also have a much more natural mottling of white or yellow colors present in the leaves.
The smaller varieties are often times sports or variants. For example, Dieffenbachia Camille comes off a ‘Compacta’ variant, with cream-colored or white leaves that exhibit thin, green strips on its borders.
Some of the smaller varieties to look for at the garden center include:
- Dieffenbachia Camille
- Dieffenbachia Compacta
- Dieffenbachia Delilah
- Dieffenbachia Exotica
- Dieffenbachia Sparkles
- Dieffenbachia Star Bright
- Dieffenbachia Tiki
Dieffenbachia care is the same for both large and small varieties.
How Much Light Does Dieffenbachia Need?
Dieffenbachia does well in a semi-sunny to a shady location and does not need much sunlight.
The plant will, however, thrive in bright light conditions. Dumbcanes do well when grown under artificial plant lights.
Bright light does make the ordinarily dark lush growth and color; the Dieffenbachia is known for to become dull.
Dieffenbachia can grow outdoors with lots of sunlight but needs protection from wind and the hot noon sun of summer or plants begin to look sickly.
Too much sun will burn the leaves, but too much shade on the heavy white/yellow varieties will cause them to be poorly colored.
What Is The Best Temperature For Dumb Cane Plants?
The Dieffenbachia plant does well as a houseplant, thriving with year-round average room temperatures of 65° – 75° degrees Fahrenheit. Dieffenbachias will not tolerate low temperatures.
Anything below 60° degrees Fahrenheit and growth begins to slow. Some varieties start to show cold damage when temperatures fall below 55° degrees Fahrenheit.
In fact, high temperatures and bright light can make Dieffenbachia weak and sickly.
How Often Do You Water Dieffenbachia?
Being from the aroid family Araceae – with cousins like the “Chinese Evergreen” (Aglaonema), “Peace Lily (Spathiphyllum)” and Philodendron – lets us know dieffenbachia likes humidity.
As for watering, we recommend to water your dumb cane thoroughly and allow the soil to thoroughly “approach dryness” between waterings.
Watering Dieffenbachia indoors is somewhat of an art form. There is no exact schedule. You need to consider the location, time of year, soil type, lighting and humidity which all contributes to – How often you should water any dumb cane houseplant.
Plants often need more water during the summer seasons and less during winter time. The growth cycle of this plant starts in March and ends in October.
Too much water (overwatering) may drown the fleshy roots, or cause rank, weak growth, and stems to become mushy.
How Do You Fertilize Dieffenbachia?
The easiest way to Fertilize dumb cane is to add a bit of liquid-plant food every other time you water the plants. Apply NO plant food during the winter months only water.
Use a balanced water-soluble liquid plant fertilizer at ½ strength when watering. For most common liquid houseplant fertilizers like Miracle-Gro expect to mix a ½ tablespoon per gallon of water.
When repotting or transplanting add a small amount of a solid time-release fertilizer to the soil. Always follow the recommended fertilizer rates you find on the fertilizer packaging.
What Is The Best Soil For Growing Dieffenbachia Plants?
A soil mix used to in African violets care would be fine.
You’ll often find recommendations such as:
- One part all-purpose loam
- One part peat moss
- One part sharp sand, perlite or vermiculite.
Growing Dieffenbachia outdoors on an open shaded patio the above soil mix may work well.
When growing indoors as a houseplant, purchase a houseplant potting mix or make your own with two parts peat moss and 1 part perlite. Keep it simple.
Potting Tips: When potting or repotting plants, springtime is best just before the growing season begins. Do not overpot!
Dieffenbachia Pruning and Grooming
There is no need to ask “When to prune your Dieffenbachia” as it does not need grooming or pruning! Older leaves will yellow and need removing, but other than that little “grooming” is required.
How To Propagate Dieffenbachia
Propagating plants is a great way to increase your collection and knowledge of dumb cane plant care. Plus, the Dumb Cane is quite easy to propagate.
Is your Dieffenbachia getting too big for that spot in the house?
There are several ways to propagate Dieffenbachia using top shoots (big tip cuttings), stem shoots or removing suckers to grow new plants. There and several reasons to propagate as well.
IMPORTANT NOTE: When propagating dumb cane, ALWAY make sure to use a clean knife or razor while cutting new shoots as this plant is very susceptible to bacteria.
Afterward, wash the knife thoroughly to remove any poisonous sap. Drip the knife or blade in alcohol to further sterilize. Bacteria is nothing to play with.
What To Do When Your Dieffenbachia Grows Too Tall? Take Topshoots!
One frequent complaint about Dieffenbachias is that over time older specimens become leggy, develop bare stems with only a small tuft of leaves at the top.
This can make them top heavy and without enough weight in the pot, plants can easily fall over damaging leaves and the plant.
After a certain age, this is more or less normal. When the plant has a more tree-like form (almost resembling a palm tree) it makes the plant unattractive.
The Topshoots method of propagation is ideal when your Dieffenbachia grows long legs, and there is plenty of naked stems.
To shorten a plant, or simply to eliminate the bare stem one option is to air-layer the top.
The other option is to sever and cut the top portion of the plant off a few inches below the bottom leaves.
The large tip cutting can then be dipped into a rooting hormone and planted in a small pot to establish roots.
Another method is to root the topshoot in water. Yes, you can root a Dieffenbachia in water. Once roots start to form transplant the new shoot into a pot using the soil recommended above.
NOTE: While waiting for roots to form syringe the foliage frequently.
You’ll soon have another vigorous, healthy plant in no time!
Rooting cuttings is done the same way at the top shoot except that the cutting comes from suckers and not the tip of the plant.
How Do You Propagate From Stem Shoots?
Gently remove stem cuttings at the stem area.
These are the parts of a stem that has “eyes”, or points where new leaves and plants will sprout.
Place stem cuttings on their side, with about 1/2 the stem buried in the soil with the “eye” pointing upwards. Rooting in a “mini” greenhouse like a soda bottle planter will speed up the rooting process.
The stems will soon grow roots and turn into singular specimens. This propagation method can be accelerated if you keep the environment humid. Make a simple mini greenhouse from a soda bottle to prevent moisture from escaping.
Roots should start forming in 2-4 weeks. Keep temperatures around the 72° degree Fahrenheit range.
Final words on propagation. In the world of Dieffenbachia, you’ll find many mutants, sports, and variants. To keep stock clean most of the plants produced today and sold commercially start in labs as tissue culture microcuttings.
Dieffenbachia Pests and Diseases
One of the most common questions asked in caring for Dieffenbachia is:
Why Is My Dieffenbachia Leaves Turning Yellow?
Yellowing leaves come with several possibilities.
If your plant has is healthy and one or two dieffenbachia yellow leaves show up throughout the course of the year it is most likely an old leaf.
Older leaves naturally die once they reach about one year old. If the plant is experiencing more than the occasional leaf dying off, a more serious problem may be starting to show.
Massive yellowing and dropping of leaves including:
- Curled leaves curl
- Leaf tips turning brown and dying back
- Plant rotting, wilting and bleached foliage
- Weak new growth
Overwatering usually causes these conditions. Follow these steps to try and help the plant recover.
- Remove the plant from the pot
- Make sure the drainage holes are not clogged
- Check the roots for health.
- Roots should be white and free from any disease or rot.
- Remove any damaged roots
- Make sure the plant has the right soil
- If the root system looks good, and only a few roots need removing put the plant back into the pot, add new soil if required or repot using fresh soil.
- Remove all bad or damaged leaves
- Place plant in a well-ventilated area
If after removing the plant from the pot the roots are mushy and soft the plant will likely not survive. Take any tip and stem cuttings possible and follow the propagation tips above.
Throw the old plant out including the soil.
The Dieffenbachia is a tough plant whose one weakness is bacteria (Erwinia). The plant will exhibit rotting leaf joints that will spread throughout once it’s infected. Rotting can also start on the stem.
Once infected there’s very little you can do to save the plant. Pots can be reused, but make sure to take the proper steps to disinfect it before reuse.
What Causes A Dieffenbachia To Have Brown Spots On Leaves?
The Dieffenbachia does like humidity and does not like cool temperatures. When plants experience a sudden chill and too much humidity a fungal disease known as anthracnose can develop.
The leaves will have black or dark tan spots in the center and dark, narrow margins. Leaf tips or margins become brown and die back.
- Remove and destroy these fungal infested leaves
- Keep plants on the dry side
- Keep plants in a well-ventilated area
- Spray healthy plants with a fungicide (neem oil) to stop the spread of the disease
NOTE: Most homeowners will never experience the anthracnose problem with their plants indoors.
Brown Spots On White-Patterned Dieffenbachia Varieties
During the winter months, plants are not in an active growth phase and the need for water and fertilizer is lower.
Leaves on white-patterned Dieffenbachia varieties – Compacta, Camille, Exotica, etc. – can exhibit dry brown spots during the winter caused by the soil staying too dry or too much fertilizer.
During winter months – DO NOT allow the soil to dry out completely and DO NOT fertilize!
Why Are The Stems and Roots Rotting On My Dieffenbachia?
When plant stems and roots turn soft and mushy at the base it’s known as – stem rot and root rot.
This is a fungus disease (Fusarium) caused by several conditions:
- Too much humidity
- Temperatures too high
- Temperatures too low
Take the following steps to rescue the plant:
- Remove the plant from the pot
- Remove all soil
- Remove all infected areas – leaves, roots, and stems
- Treat all wounds with a fungicide
- Repot in fresh soil and a new pot (recommended)
- Allow soil to dry well before rewatering
- Keep the plant the proper growing conditions.
Top Down Stem Rot
Stems can also rot from the top down. What are the signs?
- Curled leaves
- Discolored foliage
- Soft foliage
- Leaves with brown edges
These “plant alerts” are caused by cold drafts and cold temperatures.
To combat top down stem rot take the following steps:
- Remove all infected areas
- Treat all wounds with a fungicide
- Move the plant a warmer location
NOTE: These spots aren’t caused by bacteria and will appear withered as compared to a rotten and smelly when they are infected.
Why Is My Dieffenbachia Having Distorted Leaves? (Dasheen Mosaic Virus)
Distorted leaves are often caused by the Dasheen mosaic virus. The virus is more common on select Dieffenbachia cultivars.
Symptoms include distorted leaves and stunted plants. Aphids and man commonly help spread Dasheen mosaic virus. Today most pathogen-free Dieffenbachia stock is produced my tissue cultured micro-cuttings.
No chemicals can control this virus disease. Monitor other plants such as Aglaonema, Spathiphyllum, and Philodendron for symptoms, as they can act as a host and reservoir for the virus. [source]
How To Control Mealy Bugs, Spider Mites, And Aphids On Dieffenbachia
The indoor conditions – warm and dry – during winter months make a perfect place for spider mites to set up shop on the underside of leaves and feed – sucking the juices out of your plants.
Any time of the year those cottony, sticky looking pests mealybugs hiding in clusters in leaf axils and on stems, even venturing to the root area. They also enjoy feeding on your Dieffenbachia.
Aphids enjoy sucking the juices and feeding on new growth during the active growing season.
To control these Dieffenbachia pests:
- Examine your plants weekly – all the way down to where the leaf meets the stem
- Clean and wipe the tops and bottoms of leaves
- Use sprays designed to control the insect pests such as Malathion or garden safe Neem oil for plants. – mealybugs, spider mites, aphids (homemade control) and other pests.
What Are The Most Popular Dieffenbachia Varieties?
The plant – Dieffenbachia aka Dumb Cane – has been grown and available as a houseplant for decades. Over that time many varieties have come and gone.
The varieties available break down into two groups based on their size – large floor plants and smaller “table top” selections.
Large Dieffenbachias – Floor Plants
These large varieties make striking individual specimens indoors if you have the real estate or outdoors on a covered patio for example.
The plants can reach heights of 4 – 5 feet if allowed. However, indoors a plant 30” – 42” is more the norm.
The most popular large varieties are:
Dieffenbachia Amoena as discussed above. There are also various sports of “Amoena” available. The most popular or well known patented variety is “Tropic Snow” PP 2,869.
“Tropic Snow” was discovered in the 1960’s as a sport in a block of Dieffenbachia amoena growing at Chaplin’s Nursery in Fort Lauderdale, Florida, according to US Patent Office records. I actually visited the nursery many years ago.
A patent for the plant Dieffenbachia amoena cv. Tropic Snow Plant Patent 2,869 was issued on February 25, 1969. It was the first Dieffenbachia to receive a patent.
The “discovery” document filed at The United States Patent Office August 14, 1967:
“The present invention relates to a new and distinct variety of Dieffenbachia plant which was discovered by me in a shade house on my nursery property located at Davie, Fla., as a sport of the unpatented Dieffenbachia amoena.
My attention was attracted to one particular plant in this block which bore some variegated leaves quite different in appearance from the other leaves on this plant and different from those of all other plants in this block, as well as strikingly different from the leaves of all other Dieffenbachia varieties previously known to me.
Upon close inspection of this particular plant, I found that it had sported from a stem near the ground, and I accordingly took immediate steps to preserve the sport and keep it under close observation. Shortly thereafter, I took tip and cane cuttings from the sport to propagate the same, as performed by me in my nursery aforementioned.
Continued observations and tests of the sport and the progeny thereof derived from the cuttings aforesaid, have convinced me that it represents a new and improved variety which is distinctly different from the parent variety, as well as from all other Dieffenbachia varieties of which I am aware, as evidenced from the following unique combination of characteristics…” [source]
Small Dieffenbachias – Tabletop Plants
There are many more smaller varieties available on the market and many are produced from tissue culture microcuttings. Below are several well known varieties growing in size from 18” – 30” inches.
Well-grown plants have stout stems, completely hidden by the bases of the leaf petioles where they clasp, but exposed below, where older leaves have fallen.
Dieffenbachia ‘Alix’ is a sport of ‘Tropic Snow’ with white and green variegated leaves but smaller and suckers well. [source]
Dieffenbachia ‘Camille’ – bushy grower reaching 20 inches tall, creamy white leaves with green midrib and borders. more
Dieffenbachia ‘Camouflage’ pp#12275 – A plant mutation of the not patented Dieffenbachia sp. cultivar ‘Panther’ (Dieffenbachia Panther). Characterized by large leaves with unique and attractive variegation pattern. Freely clumping, full, dense plants with an upright growth with an outwardly arching growth habit.
Dieffenbachia ‘Compacta’ – like ‘Camille’ growing to 22 inches tall with green spots.
Dieffenbachia ‘Memorii Corsii’ – carries Silver-like marking with a moderate branching habit. Memoria Corsi has been around for almost 150 years.
As described in the 1871 The Garden: an illustrated weekly journal of gardening in all its branches
Found in the Spring Flower Show In Paris. The show of the Paris Horticultural Society
“M. Dalliere, of Ghent, the only foreign exhibitor, showed a small group of new plants, including Dieffenbachia memoria Corsi.” [source]
Dieffenbachia ‘Nelly’ – small, well branching, compact slow growing with cream and green leaf variegation. Often used in dish gardens or small 6-inch pots.
Dieffenbachia ‘Panther’ – A fast-growing plant, large dark green leaves with wide silver streaks etched down the mid-rib. Additional lighter green random “spots” decorate the leaf blade. Leaves can reach lengths of 24” long and 10″ wide.
Dieffenbachia ‘Parachute’ – Medium sized plant, with white creamy variegation sitting atop dark green foliage. Beautiful green with yellow speckled leaves.
Dieffenbachia ‘Perfection’ – a variety like ‘Compacta’ with cream and green variegation and larger leaves.
Dieffenbachia ‘Rudolf Roehrs’ – holds leaves are gold-green with white blotches, dark green leaf edges, and midvein.
Dieffenbachia ‘Splash’ PPAF – A hybrid from Oglesby. An upright, fast grower with a good branching habit.
Dieffenbachia ‘Star Bright’ – Dark green margins on cream-white foliage with speckles dark green speckles. Long, narrow leaves, unlike most other Dieffenbachia varieties on the market.
Dieffenbachia ‘Sterling’ pp #14762P2 – Compact, well-branched plants with averaging 4-8 basal shoots per plant. Very deep green leaves highlighted with dramatic white midrib extending from the leaf base to the leaf tip creating a herring-bone pattern.
Dieffenbachia ‘Tiki’ pp #7298 (expired) – Deep green margins on the leaf edge with light green venation fading to dark with bright white spots. This sport or cultivar was discovered at Vanderlaan’s Nursery, Inc., Lake Worth, Fla. from a population of asexually propagated Dieffenbachia memoria Corsii plants. [source]
Dieffenbachia ‘Triumph’ – creamy white leaves with green border and a pink cast at the petiole base. Grows to 22 inches tall.
Dieffenbachia ‘Tropic Marianne’ pp #8832 – characterized by a dense upright branched habit and yellow-green oblong leaves bordered with green.
Dieffenbachia ‘Wilson’s Delight’ – large solid-green leaves with a white mid-vein.
Learn about dieffenbachia hybridization at the University of Florida.
What Are The Best Uses For The Dieffenbachia Plant?
The larger Dieffenbachia varieties make excellent floor plants. Make sure to place them in locations where people traffic is low. Also large plants can topple over if they get top heavy or dry out when placed in areas where they may experience drafts.
Smaller varieties which reach 24” to 30” inches tall can also can also function as floor plants. Other can make great additions as single specimens in an attractive decorative pot on a desk or credenza.
Smaller Dieffenbachia varieties make good bathroom plants with the high humidity found in bathrooms.
Wrapping Up Dumb Cane Care
For the best look, thriving Dieffenbachia plants should have a bushy shape with a compact frame, full, glossy leaves and a healthy and succulent appearance.
Even with the “downside” the Dieffenbachia plant is a wonderful addition for indoor use and brings a real tropical look to any interior.
The 56 Dieffenbachia Species listed at The World Checklist of Selected Plant Families Maintained by the Royal Botanic Gardens, Kew.
- Dieffenbachia aglaonematifolia – Brazil, Paraguay; Corrientes + Misiones Provinces of Argentina
- Dieffenbachia antioquensis – Colombia
- Dieffenbachia aurantiaca – Costa Rica, Panama
- Dieffenbachia beachiana – Costa Rica, Panama
- Dieffenbachia bowmannii – Colombia, northwestern Brazil
- Dieffenbachia brittonii – Colombia
- Dieffenbachia burgeri – Costa Rica
- Dieffenbachia cannifolia – Colombia, Ecuador, Peru
- Dieffenbachia concinna – Costa Rica, Nicaragua
- Dieffenbachia copensis – Panama
- Dieffenbachia cordata – Peru
- Dieffenbachia costata Klotzsch – Colombia, Ecuador, Peru
- Dieffenbachia crebripistillata – Panama
- Dieffenbachia daguensis – Colombia, Ecuador
- Dieffenbachia davidsei – Costa Rica
- Dieffenbachia duidae – Venezuela, Guyana
- Dieffenbachia elegans – Bolivia, northwestern Brazil, the Guianas
- Dieffenbachia enderi – Colombia
- Dieffenbachia fortunensis – Panama
- Dieffenbachia fosteri – Panama
- Dieffenbachia fournieri – Colombia
- Dieffenbachia galdamesiae – Panama
- Dieffenbachia gracilis – Peru, northwestern Brazil
- Dieffenbachia grayumiana – Costa Rica, Panama, Colombia
- Dieffenbachia hammelii – Costa Rica, Nicaragua
- Dieffenbachia herthae – Ecuador
- Dieffenbachia horichii – Costa Rica
- Dieffenbachia humilis – Bolivia, Peru, Ecuador, northwestern Brazil, the Guianas
- Dieffenbachia imperialis – Peru
- Dieffenbachia isthmia – Panama
- Dieffenbachia killipii – Panama
- Dieffenbachia lancifolia – Colombia
- Dieffenbachia leopoldii – Colombia
- Dieffenbachia longispatha – Honduras, Nicaragua, Costa Rica, Panama, Colombia, Venezuela
- Dieffenbachia lutheri – Panama
- Dieffenbachia macrophylla – Peru
- Dieffenbachia meleagris – Ecuador
- Dieffenbachia nitidipetiolata – Panama
- Dieffenbachia obliqua – Peru
- Dieffenbachia obscurinervia – Panama
- Dieffenbachia oerstedii – southern Mexico (Veracruz, Tabasco, Campeche, Oaxaca, Chiapas), Central America (all 7 countries), Colombia
- Dieffenbachia olbia – Peru
- Dieffenbachia paludicola – northwestern Brazil, the Guianas, Venezuela
- Dieffenbachia panamensis – Panama
- Dieffenbachia parlatorei – Colombia, Venezuela
- Dieffenbachia parvifolia – northwestern Brazil, Bolivia, Ecuador, Peru, Venezuela
- Dieffenbachia pittieri – Panama
- Dieffenbachia seguine – West Indies, south to Brazil and Bolivia
- Dieffenbachia shuttleworthiana – Colombia
- Dieffenbachia standleyi – Honduras
- Dieffenbachia tonduzii – Nicaragua, Costa Rica, Panama, Colombia, Ecuador
- Dieffenbachia weberbaueri – Peru
- Dieffenbachia weirii – Colombia
- Dieffenbachia wendlandii – southern Mexico (Querétaro, Veracruz, Oaxaca, Chiapas) south to Panama
- Dieffenbachia williamsii – Bolivia
- Dieffenbachia wurdackii – Peru