Roots growing from the stem?

Kivik, Sweden


I am quite new here. Been reading a lot of threads but never posted anything.
Here is my first contribution with a question.

I wanted to see what would happen if I put a tomato plant inside a sealed jar and just left if there.
Now it has started to grow roots directly out of the stem.

What is the reason/how can it happen?
Does it have to do with the high level of humidity inside the jar?

Thumbnail by Letsgetphil Thumbnail by Letsgetphil Thumbnail by Letsgetphil
Cleveland,GA/Atlanta, GA(Zone 7b)

Tomatoes are easily capable of growing roots from stem cuttings. Look for online articles on tomato stem cuttings. I am currently propagating stem cuttings from several heirloom plants where I had earlier growing problems and want more than one of those plants. I place a cup with water at the base of the plant and cut one or more suckers. This way I know the variety. A week or ten days later there are roots. I pot the suckers, keep them wet initially and slowly adapt them to life in soil. Then into the ground.

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