DegenMJanswered grow question 2 years ago I'm fairly convinced the heat outside killed these and here's why: 1) I repeated the "experiment" with 3 new seeds inside, and all three sprouted four days later. 2) I checked those that were still in the rooters from 12 days ago and they've made no progress at all, so I threw all the old seeds out and replaced them with new seeds. It seems the solution in this case is germinating these inside at a steady 70-75F temperature instead of outside where the temperature fluctuates 75F-90F.