I recently transplanted a bunch of corn flowers and they are turning purple and red. I also have lupins, tomatoes, and sun flowers turning red and purple. When I transplanted them i dug the hole twice as deep and filled the difference with soil, 3 in 1 and 1/8 of a teaspoon of organic 4-4-4 fertilizer and lightly watered it before placing in the seedlings. They were all hardened off prior and had not been fertilized in ten days. Last fertilizer i used was a 2-2-2 fish emulsion at half strength. I thought I might have over fertilized but I have some that haven't been transplanted that look the same. What could the problem be and what can I do?