When to start planting? One year I started my plants at the first of April. Than 2 mo.s later my buddy started his first of June and by his caught up to mine. I felt like I wasted 2 mo.s. That was out side with no greenhouse (GH). I will be using a GH this year, But, I don't want to waste 2 mo.s again. PLEASE, SEND ME YOUR INPUT ON WHEN TO START outside in a GH. Green Blessings and peace out.