If you go out to the vegetable garden one day and find the bottom leaves of your tomato plant are turning yellow, don't go into a panic. There are many reasons why tomato leaves turn yellow, and usually it is a fairly easy fix.Some situations that can cause yellow leaves are under-watering and over-watering, nitrogen deficiencies in the soil, a lack of sunlight on the bottom leaves, or a possible disease. Let's discuss each one of these, and … [Read more...]