Tomato Plants With Yellow Leaves

I have a small greenhouse that I start over 400 tomato plants in for sale. This spring we have had some pretty nasty weather and some warm days, too. Since I have transplanted all the plants into 3.5 inch pots, some are doing great and some are turning yellow and their growth seems to be stunted.

Although I am a smoker, I always wash my hands and wear disposable gloves every time I transplant my plants. I have only 2 or 3 weeks before I'll start to sell my plants and I want to make sure they are the best around, as they usually are. I have repeat customers that rely on my quality plants. My greenhouse pots are all new and my soil is MiracleGro potting mix.

Could I have over watered them? The greenhouse gets up to about anywhere from 60-100 degrees during the day and at night I use 4/100 watt bulbs to keep them warm. Sometimes I've had to cover them with sheets of white plastic so they don't get too cold. I am sending pictures of a good plant and some yellowing plants. I was thinking of re-transplanting the yellow ones, but that's probably 60 plants. Please help me.

Hardiness Zone: 4a

By Billie Oneil from Sheridan, WY

Answers:

Tomato Plants With Yellow Leaves

Some tomato plants nearly shut down in high heat. They might fare a lot better out in the open than in the greenhouse since it gets so hot in there in the daytime. (05/07/2009)

By Joy