Tomato Seeding Fatalities - Knowledgebase Question

Denver, CO
Avatar for rpwind
Question by rpwind
April 7, 1998
I planted several varieties of tomato seeds in a seed starting mix. They are under fluorescent lights and recieved plain water until the second set of true leaves formed. The seeds all sprouted quickly and put up their first true leaves. Then several varieties ceased to grow, the seed leaves turned yellow and then the tips of the true leaves turned brown and withered. They refuse to either die or continue growing. What causes this and can it be fixed or prevented?

Answer from NGA
April 7, 1998
Your seedlings are pouting - are the tops of the plants about 6 inches below the artificial light source? Do you keep the lights on 14-16 hours each day? Do you keep the potting soil moist? Did you feed a diluted liquid fertilizer rather than full strength fertilizer? Was the seed starting mixture sterile? How's the temperature? Seedlings do best at 60F to 70F degrees. Try adjusting all of the elements listed above and see if the seedlings don't perk right up.

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