Indoor seedlings turn yellow or dry up
(Kalamazoo, MI, USA)
Every time I start plants indoors from seed, they start out very good and even get to several inches tall. Then all of a sudden some turn yellow then brown, then burn up. I have asked advice from several growers for the past three years. I rarely get a helpful answer. This happens when I plant outdoors also, but I have more control over it. Right now it is my tomatoes and cucumbers that are affected. Is it the soil or too much light? Can some one give me some advice on this problem. Thank you.