Tomato Quirks Part 2 – Bumpy Stems

Tomato Quirks Part 2 - Bumpy Stems

This is Part Two of a seven part series on Tomato Quirks. If you missed the previous article on catfacing, please check it out: Tomato Quirks Part 1 – Catfacing.

You go out to your garden, begin checking out your tomatoes plants, and picking some great looking tomatoes. Then all of a sudden you notice that the main stem of your plants are covered in little tiny bumps. Don’t worry too much, those bumps are not a big threat in most cases.

What Are These Bumps On My Tomato Plant?

Bumpy Stems on Tomato PlantIf you look closely at a tomato stem, you will notice hundreds, if not thousands, of little tiny hairs.

These hairs will turn into roots when buried underground. That is why it is advantageous to plant tomatoes deep.

By planting your tomatoes deep, those hairs will grow into roots, creating a stronger and healthier root system.

When these hairs are above ground, they will form tiny bumps (often called Tomato Stem Primordia) on the stems of the plant.

The Tomato Stem Primordia are the earliest stage of development of the roots. The bumps are caused by high humidity, predominantly wet weather, or overwatering. The bumps themselves are not harmful to your tomato plants, and are usually deemed as normal.

Watch Plants Closely If You Find Bumps On The Stems

Bumps on the stems can also be a sign of root problems, so keep a close check on your plants. This is usually not the case, but it doesn’t hurt to watch for any signs of wilting, browning leaves, or that the plant’s growth is hampered.

Example of Tomato Stem Primordia

Part Three of Tomato Quirks will discuss green shouldered tomatoes. Be sure not to miss it by subscribing to our RSS feed or by bookmarking us.

Tomato Quirks Part 1 – Catfacing

Tomato Quirks Part 3 – Green Shoulders

Tomato Quirks Part 4 – Sunscald

Tomato Quirks Part 5 – Splits & Holes

Tomato Quirks Part 6 – Spotted Tomatoes

Tomato Quirks Part 7 – Leaf Roll

Grow Fantastic Tomatoes

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3 Comments on Tomato Quirks Part 2 – Bumpy Stems

  1. What if its a root problem? Do I get rid of the whole plant?

    • Hi Elle – What kind of root problem are you having? Generally, bumpy stems are not that big a deal and is fairly common during very damp weather conditions.

      If your tomato plant has a severe root problem then more than likely it will not grow and produce properly. If that’s the case you are probably better off just pulling the plant up and starting over with a new one. I would suggest finding out what caused the root issue in the first plant. If it’s something like root-knot nematodes then you should address that issue (or whatever the issue is) before planting again.

      Hope this helps!

  2. This blog was… how do I say it? Relevant!! Finally I have found something that helped
    me. Kudos!

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