Why are the bottom leaves of my tomato plants turning yellow?

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Why are the bottom leaves of my tomato plants turning yellow?
If the edges of the leaves are brown, then maybe too much water or food, but if they just get pale and then fall off, not enough food, especially nitrogen, as the bottom leaves give up their nutrients for the rest of the plant.
Reply:too much water
Reply:yup; too much water, or maybe a little heavy on the fertilizer.
Reply:OK, this early in the year too much water is probably the answer...but here in Southern Illinois, we get a lot of tomato blight. That is a fungus that is in the soil and gets on the leaves when water splashes on the leaves from rain or watering. I have only lost a couple plants to the blight in 10 years. Solution:





1: Mulch around the bottom of the tomato plants. I use either grass clippings, (make sure there has been no "weed and feed" put on the grass) or I get a few bales of hay and spread it around. This way you can also pick tomatoes after it has rained and not get mud all over your shoes.





2: I pick all the leaves and stems off my tomato plants up to 1 foot off the ground. This takes some time, but the water will not splash up on the leaves, and I will have good tomatoes all summer and fall until the first heavy frost.





srockey
Reply:Either overwatered or not enough light at the bottom.
Reply:to much water- or it could be the bottom leaves are dying off-if your tomatoes are on there 3rd or 4 th set of leaves it would be Ok to "snip" the yellow ones off-don't pull them off that leaves a "bruise" mark on the stem and weakens the plant.
Reply:too much water. make sure your soil has good drainage. if not, you may want to try a raised bed. and as was suggested use a soaker hose. with a soaker hose and a raised bed it's almost impossible to overwater.
Reply:........once again...too much water. Tomato plants should be watered via soaker hose too. Like roses they are susceptible to fungus when the leaves do not dry thoroughly.
Reply:Water may be the cause, but the tomato plant leaves must not be to close to the ground. Fertilizers can cause yellowing too. Just pinch the leaves off, add a little dry mulch around the "stem" and it will do just fine.

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