Potassium: The Importance Of Potassium For Plants

the importance of potassium for plants

It’s simple, you need potassium for plants if you want healthy plants. It’s vital that you have the right amount of potassium in your soil because large amounts are absorbed from the plant root zone during crop production.

Garden potassium is usually applied as potash, which helps plants in making good use of the available water.

Being able to make efficient use of water supports plants in growing in a healthy and uniform manner. While the role of potassium is vital to all plants, it is especially necessary for food crops. Research has shown potassium:

  • Improves water use efficiency
  • Increases resistance to diseases and insects
  • Helps stimulate early growth
  • Increases the production of protein
  • A healthy balance of potassium enhances the quality and size of produce.

What Happens When Plants Don’t Get Enough Potassium?

Without enough potassium, plants experience a nutrient deficiency and show it with stunted growth. Furthermore they produce fewer flowers, vegetables and fruits, resulting in reduced crop yield.

A plant not receiving enough potassium may have scorched looking leaves that curl up at the tips. The leaves may also appear crinkly, dry and white spotted around the edges.

Overall plant growth slows without potassium, and plants suffering with potassium deficiency symptoms will quickly succumb to high temperatures and high winds.

How Can You Give Your Plants A Dose Of Potassium?

While commonly found in soil, most soil does not have enough potassium to keep plants strong and healthy.

Additionally, sometimes the soil may hold a high potassium level but not in a form that plants can easily use and absorb. Supplement the needed plant nutrients with a good quality fertilizer.

Limited Sources Of Potassium

You’ll find a limited number of usable fertilizer materials to supply K when needed.

  • Potassium Chloride – mined from underground deposits in Saskatchewan
  • Potassium-Magnesium Sulfate – used when the need for magnesium exist. Many gardeners get the magnesium from epsom salt and swear it’s their secret weapon.
  • Potassium Nitrate
  • Potassium Sulfate

To give your plants a boost of potassium, you can use either a liquid foliar spray or a solid fertilizer for a quick fix. Follow directions to apply your fertilizer correctly to provide a potassium boost.

Remember that chemical and synthetic fertilizers do not typically provide ongoing nourishment for your plants, but if your plants are potassium deficient these products will provide a bit of a jumpstart. For ongoing nutritional support, you must take care to amend your soil regularly with organic compost for steady, slow release nourishment.

Some substances you may wish to add include:

  • Composted manure
  • Muriate of potash
  • Sulfate of potash
  • Wood ash
  • Greensand

Take care to check soil pH and get a soil test before you add any nutrient solutions or amendments. Remember that amending without understanding what you’re correcting is very likely to make matters worse [nutrient burn] instead of better.

[Read: Why Is Phosphorus Important In Plant Growth]

The Role Of Potassium – What Does It Do?

When you give your plants a dose of commercial fertilizer, the potassium it contains should help plants to perk up fairly quickly. The reason for this is that the plant nutrients found in chemical fertilizers are water-soluble. This means they dissolve rapidly in water and plant uptake is absorbed almost immediately.

Potassium works by controlling plant stomata. These are the cells that control water within the plant structure. If your plant has not had enough potassium, the stomata will not use water efficiently. This means that your plant will become vulnerable to heat stress with plant tissues having less disease resistance.

Smart Fertilizer sharesPotassium triggers activation of enzymes and is essential for ATP production – Adenosine Triphosphate. ATP is an important energy source for many chemical processes taking place in plant issues.

When you provide your plants with a potassium concentration, it stimulates the stomata to work efficiently. Additionally, the potassium provides nourishment for necessary enzymes.

All of these factors work together to help the plant make the most of the nutrients in the soil to keep leaves and roots healthy and produce more flowers, fruits or veggies. Just remember that water-soluble nutrients are only helpful in the short-term.

Long-term correction of potassium deficiency must be addressed with ongoing use of organic soil amendments.

No Matter What You Are Planting, It Needs Potassium!

From lawns to roses, tomato plants and food crops, all plants need a generous amount of easily absorbable potassium to grow big and strong and produce abundantly. With a healthy amount of potassium, plant growth is properly regulated and plants can thrive and produce in abundance.

Sources: 1 | 2 | 3 | 4

 

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