Q: I have a problem growing vegetable seeds. I buy seeds from good brands because I want to grow varieties that I can’t find as plants at the store. I use good soil in trays, and I follow all the directions. The problem is that the stems of the seeds grow as though they are vines. Before there is even a leaf, the stem grows to be at least six inches long. The plants just flop all over each other. Eventually, I plant the tomatoes because they can grow roots from the stems, but I have to tie the other plants to stakes to get them to stand up. They grow slowly, but by the end of summer, most of them have produced some fruit. What am I doing wrong?…