2) Disease: Tomato Diseases such as blight can also cause tomato leaves to turn yellow. Following the tips my Free Tomato Disease checklist can help to prevent blight and other diseases from happening. If you don’t have one you can get a copy here bit.ly/tomatossq.
3) Lack of Water: Before you try anything else, check around the base of your plants to see if the soil is moist. Yellow leaves caused by a lack of water is the easiest cause to fix.. Just add water. If you want a longer term solution to watering (and disease and nitrogen) check out this video I posted on Facebook:
As always the very best protection against yellowing leaves, browning leaves, spotting leaves and so on, is to make sure your soil is right.
The fastest, easiest, most affordable way to do that is Terra Fresh Home and Garden. You can learn more and get some of your very own here!
I hope you have a beautiful evening and we’ll talk to you soon!
Lex (the tomato guy)