Trying to grow some dwarf tomatoes inside under grow lights and the leaves seem to be turning yellow. Soil temp is around 76 with the heating mat, I used Fox farms ocean forest potting soil about 18 days ago for the intermediate pots so they should have plenty of food. The lights are high and the ppfd seems to be in an acceptable range for their growth stage. Any advice would be appreciated!
by rileyluck
4 Comments
It looks like it may be nutrient burn based on the fact that the lower branches seem to be affected first.
Have you grown dwarfs under lights before?
Please get them off the heat mat. Those are great for encouraging germination, but are not useful during this stage of growth. In fact a heat mat is harmful to seedlings of this size.
Also, be sure you have a fan in the grow area. They need air circulation to develop strong stems. Sounds like you are on top of everything else (watering, fertilizing, light.) I’ll bet that addressing those two concerns will make a world of difference.
Best of luck for a good growing season. It’s excellent that you have gotten an early start!
It is pretty common to lose the bottom few sets of leaves. I usually pinch them off when I pot them up. I would trimm off the yellow leaves and keep an eye on it.