You are basically creating a terrarium effect, and most icicles are longer than they tell you, so give them at least 4" dirt. Let me see if I have a jug of milk, chuckl
Ok, you want the top so cut in a way it is still attached, this is so the water doesn't linger in the bottom and rot your dirt and plants, mist the seeds and place where soil temps are above 60*. Does that soil temp sound right
@Weedwhacker?