Late june. my tomatoe plants are turning yellow at the bottom of the plants. what is going on?

My plants are healthy but towards the bottom of the plants my leaves are turning yellow and dying. what should I do. am i watering them too much or what?

Late june. my tomatoe plants are turning yellow at the bottom of the plants. what is going on?
Do not use nitrogen on tomatoe plants at this stage as suggested...They need phospherous and potassium at this stage or you will get all leaves and no fruit... Sprinkle epsom salt around each plant at the rate of 2 tablespoons per plant foot height ..a 3 foot plant will take 6 tablespoons, but not piled around the stem but scattered loosely...This gives them magnesium and also aids them in getting the natural nitrogen from the soil, which is all the nitrogen it needs...Heres the formula for this..it recommends 1 spoon, but you cannot overuse it..this is at the healthy stage..you have yellowing leaves so they need the extra boost



http://www.epsomsaltcouncil.org/garden_u...
Reply:If the bottom leaves are turning yellow, and also curling UP on the edges - you're overwatering.



Also a possibility of too much fertilizer, though you haven't said you used any.
Reply:Or it could be blight. If the leaves are turning yellow and also have roundish black spots you will need to go to Lowes or a garden store and buy the spray to treat your plants.
Reply:It might be not enough nitrogen. Could be too much water. I would suggest sid dressing with some compost, and giving them a little fertilizer. And water a bit less often, but deeper.
Reply:Yes, Too much water. I live in Michigan where we have had rain almost everyday in June and many plants lower leaves are turning yellow.