Tomato leaves turning purple... Help!!
Hi. This is my second year starting from seed. I guess I got lucky last year because I didn't have any problems. This year, I've run into a few. Most concerning is that my tomato leaves are purple on the underside.
I started my seeds in coffee filters. Once they sprouted, I moved them to individual cups filled with seed starting mix. They were potted up when the first set of true leaves appeared. At this point, I used Miracle Grow Organic Choice potting mix.