16+ Showy, Colorful Annual Flowers Screaming “LOOK At The Flowers”

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“Look, Look, Look at the Flowers.” Who doesn’t want their garden beds or window boxes filled with annual flowers to scream as people pass by?

A garden with annual plants can be as simple or complex as one wishes.

Colorful Million Bells "Calibrachoa" a Great Annual Flower!Pin

All these factors can enter into your garden plan:

  • Combining and contrasting a variety of colors
  • Graduating heights
  • Varying round and spike flower forms
  • All combined in creating flower color producing focal points of interest

Disney World plants annuals to create gorgeous flower beds and hanging baskets!

The plant care information you need is in the list of best annual flowers below. For more details on each of these popular annuals follow the links for each plant.

Your experience this growing season will be of untold value. Next year and each season you’ll discover new combinations which suggest themselves.

Growing annuals is one of the finest ways to become an established gardener.

Once you sow annual seeds and watch them grow to flowering plants – You’re hooked!

Check Out: Annual Flowers for Shade | The Best Spiller Annuals For Containers

16+ SHOWY Annual Flowers

Ageratum (Ageratum) 6”-12” inches:


Ageratum is one of the best purple-blue annual flower options. The low compact forms are excellent as edging plants, for planting in containers or in plant boxes.

Tall forms are fine for cutting. Sow seed early indoors to get enjoy the bloom. Grows well in full sun or partial shade.

More on Floss Flower Ageratum Care

Baby Blue Eyes Flowers (Nemophila) 8″-12″ inches

Pretty Baby Blue Flowers on The Nemophila plantPin

California native and a “blue” flowering garden favorite. Plants reach 8″ to 12″ inches tall with a blue, cup-shaped flower produced on sprawling stems against a background of soft, feathery foliage.

It is one of the earliest annuals to bloom and one of the easiest to grow. It blooms heavily in poor soil.

Plants begin to bloom in February in most areas.

It is a good choice for hanging baskets in the shade and for containers in the shady patio.

More On Baby Blue Eyes Nemophila Care

Bachelor’s-Button (Centaurea) 12”- 30″ inches:

Close Up of Blue Bachelor button flowersPin

Bachelors-buttons or cornflowers are long-lasting flowers in the garden and when cut. The newer strains are double with bright clear colors.

A June sowing will flower in late fall. For earlier bloom, sow seed outdoors in late fall.

More on Bachelor Button Flower Care

Celosia (Celosia) 10″-36″ inches:

Blooming Celosia plant the Cockscomb flowerPin

Celosia or cockscomb is fantastic in form, crested typos resembling a cockscomb. The plume types are like ostrich feathers.

Flower heads may be dried by hanging head down in a dry, warm, dark place for two weeks. Celosias like light soil, full sun.

Click To Learn about Celosia Plant Care and Celosia argentea care.

China-Aster (Callistephus) 18”-30” inches:

Colorful China Asters in full bloom.Pin

China-asters are valued highly as cut flowers. Base-branching types grow to 20” inches tall, are compact, and seldom need staking.

For a long season of bloom, grow early and late varieties. It is best to select wilt-resistant strains.

Learn more on China-Aster (Callistephus)

Cleome (Cleome) 48” inches:

Cleome bloom Spider flowerPin

Cleome or spider-flower produces a bold effect in the garden. Plants tend to be leaf-less at the base, use other annuals in front of them.

Sow seed in open ground. Long willowy seedpods add interest to plants. Space 2’ feet apart.

Details on Cleome Plant Care

Cosmos (Cosmos) 30”-48″ inches:

cosmos blooms attractive annual flowers for colorPin

Plant early strains as late types may not flower before frost. Keep faded flowers cut to prolong bloom or let a few go-to seeds that attract goldfinches.

Use yellow and orange forms more often than they are at present.

More on Cosmos Plant and Flower Care

Dahlia (Dahlia) 18″-60″ inches:

Annual Flowering DahliaPin

Many types of dahlias easily grow from seed. The compact hybrids are particularly useful. Foliage is attractive; colors are fresh and clear.

Dahlia bulbs or tubers may be dug in the fall and stored in a cool place over winter. More on the winter storage of Dahlia bulbs.

New Guinea Impatiens (Impatiens) 10″-24″ inches:

popular annual flower the impressive New Guinea ImpatiensPin

Bright glowing 1″-2″ inch flowers and magnificent multicolor foliage make it a popular annual. Used outdoors as a bedding plant or in hanging baskets in shade.

Sports showy, oversized, flowers and variegated leaves. Thrives in many garden locations because it tolerates and even prefers partial sun.

Few types of bedding, landscape, and potted plants rival these plants’ popularity.

Learn More about New Guinea Impatiens Plant Care

Marigold (Tagetes) 6″-36″ inches:

always popular annual flower the marigoldPin

Marigolds, one of the most dependable annual flowers and a garden favorite. The wide variety of types available suggests limitless uses in the garden.

A border of marigolds looks fascinating with the diverse forms and colors available.

Details on Marigold Plant Care

Million Bells (Calibrachoa) 2″-9″ inches:

Popular and colorful annual flower 'Million Be;;s" great for hanging basketsPin

Heavy blooming perennial in mild climates, grown as an annual in colder zones. Small petunia-type blooms in various flower colors.

Blooms from spring until the first light frost. Considered full sun plants needing a minimum of 6 hours daily.

Million Bells need generous quantities of water.

More on Calibrachoa Million Bells Care

Moss Rose (Portulaca) 6″ inches:

Assorted bloom colors of Portulaca flowers - pink, red, yellowPin

Portulaca plants and flowers are very undemanding. The double flowers resemble a rose. Full sun and summer heat gives plenty of summer flowers in white, yellow, pink, rose, orange, or scarlet.

Flowers last only one day but bloom constantly. Pretty growing in hanging baskets, in a pot, or planter. Loves sunshine!

Also, check out the Portulaca relative – Rock Purslane aka Calandrinia

Nasturtium (Nasturtium) 12″-15″ inches:

Nasturtium flowersPin

Nasturtiums are valuable plants for dry, sandy, or gravelly locations. If soil is too rich there will be more leaves than flowers.

Train tall types on wires or allow them to fall over the edge of boxes or walls. Use leaves in salads.

Learn more on Nasturtium Plant Care

Nicotiana (Nicotiana) 15″-30″ inches:


Most nicotiana or flowering tobacco flowers open late in the day and remain until morning. White varieties (Nicotiana Sylvestris) show up particularly well at night.

A few varieties remain open during the day. The fragrant flowers of Nicotiana alata are best seen against the background of taller plants.

Care Details on Flowering Tobacco – Nicotiana alata

Petunia (Petunia) 12″-24″ inches:

Always beautiful Red Annual Petunia Flower Pin

To ensure good clear colors, petunias should be sown each year.

Don’t make the mistake of using self-sown plants that may appear in spring as colors will be inferior.

The seed is very fine and is best started early indoors or outdoors in a cold frame.

Details On Petunia Plant Care

Snapdragon (Antirrhinum) 6”-36” inches:

colorful blooms of snapdragon plants in full displayPin

Snapdragon plants and their flowers are almost unsurpassed as cut flowers. In the garden, their bloom spikes are a great asset.

The blooms offer a contrast to the rounded forms of most flowers. Pinch plants several times to encourage branching; for continuous bloom pick flowers.

Sweet-Alyssum (Lobularia) 2”-10” inches:

beautiful sweet alyssum flowers in purplePin

Sweet-Alyssum blooms fast from seed sown in open ground. Shear tops to plants for flowers throughout summer.

Some varieties are neat and compact. Others varieties are useful as trailing plants for window boxes or walls. Prefers sun.

Learn Sweet Alyssum Plant Care

Perennial Sweet-Pea (Lathyrus) 12″-72″ inches:

Close up of the colorful sweet pea blooms LathyrusPin

Plant perennial Sweet Peas very early outdoors. Best to prepare soil carefully in the fall. Plant seed as soon as soil thaws.

Plants grow best during cool, moist weather. Grow in an open sunny location in rich soil, and provide support.

Wishbone Flower (Torenia) 8″ – 10″ inches:

purple wishbone flowers up closePin

A fantastic summer annual. Small single flowers in such quantity the whole plant is covered in flowers.

Not only they good bloomers, but Torenia also blooms for a long time.

In general, enjoy Torenia wishbone flowers from the early summer until fall. Removing flowers as they start to fade will encourage new blooms.

Verbena (Verbena) 6″-18” inches:

Annual flowers of the Verbena plant, good for ground cover.Pin

Verbena plants are particularly useful as ground covers or for low masses in mixed borders.

Seeds are slow to germinate and best started early indoors.

The colors are intense and include red, pink, and purple as well as white and pastels.

Details on:  Verbena Care and Trailing Verbena Care

Annual Vinca (Catharanthus) – 12″ – 24″ inches:

Vinca Periwinkle with its pretty flowers, easy care annual flowerPin

The rose periwinkle, tolerates summer heat, is drought tolerant, grows in poor soils, and still flowers profusely.

A perfect potted patio plant. Flower colors range from white through pink, rose, and lavender.

Details on Vinca Periwinkle Plant Care and Caring for Trailing Vinca

Zinnia (Zinnia) 12″-48″ inches:

Annual zinnia flowers an must for every summer flower gardenPin

Consider Zinnias as almost basic to all summer gardens. They are long-lasting in the garden and as cut flowers and demand little special attention.

Seed may be sown directly in the open ground. There is a type for almost every purpose.

More On Zinnia Plant Care

More Annuals To Consider


Annual flowers make colorful blooming beds large or small. Use low-growing annuals to continue the display of color when the shrubs finish flowering.

Annuals are indispensable for window boxes, or container gardens on porches or terraces., patios, decks, and terraces. There are flowering annuals for every possible garden use.

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