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[Tomato Dirt #87] Small Tomatoes? Weak Plants? Check for This Deficiency in Your Tomatoes
August 20, 2015

Tomato Dirt Newsletter
Volume 5, Number 14

Dear Tomato Dirt reader,

Welcome back to Tomato Dirt! Once or twice a month, we’ll send you this newsletter packed with tips about growing tomatoes and using them.

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FEATURE: Small Tomatoes? Weak Tomato Plants? Check for Phosphorus Deficiency

Image: UMD Extension

Phosphorus plays a key role for healthy tomato plants. It helps convert nutrients into usable building blocks (proteins and nucleic acids), which allow the tomato plant to grow.

And phosphorus converts energy. It serves as a go-between for two kinds of energy in the metabolic process: high energy (ATP) and low energy (ADP).

If your tomato plant can’t convert nutrients to energy building blocks or can’t gain and release energy, then the plant can’t grow.

One big tip that your tomato plants are phosphorus-deficient are reddish-purplish leaves. But look for these other symptoms in your tomato plants too:

  • Your tomato plant grows slowly.
  • It may be dwarfed, stunted, or stressed.
  • As the growing season progresses, the tomato plant will appear to be younger than it is.
  • Once-healthy plants lose vigor.
  • Fruit will be smaller and there will be less of it.

If you suspect your tomato plants are phosphorus-deficient, use a simple soil test to find out the nutrient’s levels. You can amend the soil easily (here’s how.)

Learn more about phosphorus deficiency in tomatoes

… and get more helpful tips about other problems on tomato leaves on our Tomato Problems Pinterest Board.

Tomato Growing Tip #14: When to Use a Do-It-Yourself Soil Test to Save Money

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Get more tips for growing tomatoes on our Tomato Growing Tips Pinterest board.

Use These to Check for and Correct Tomato Deficiencies

Luster Leaf Rapitest Soil Test Kit Tomato-Tone Organic Fertilizer for all your tomatoes

More Tomato Problems and What To Do About Them

Sunscald: Why Too Much Sun Can Be Hazardous to Your Tomatoes’ Health Why a Tomato Cracks and What to Do About It Powdery Mildew: How to Identify and Treat it in Tomatoes Why Is There a Hard Core in Tomato Centers?

That’s it for now. More next time!

Until then, happy gardening!

Kathy with Tomato Dirt
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