Hi, In Jung's catalog on page 78 there are water filled insulating plant protectors, they are tepee type things. Supposedly protect to 16F. 3/$9.99 Has anyone tried them? In this area, it seems like just when the tomato plants start really rocking, we get a frost and bam. That's it. If I could get them started mid-April instead of mid-May....that would get me an extra few weeks before early frosts! Also. On page 74 they show a product called 'The Automator'. It is a 12" plastic tray that you place over the dirt-the tray has a hole in the center-you plant the seedlings inside, it holds 1/2 gallon of water and releases the water slowly through four holes in the pan. Sounds great in theory. But at $7.95 for 3, I am wondering if I can't make something similar out of aluminum pie tins for nothing, perhaps spray painted black so they aren't shiney and too reflective. Or, if the metal isn't a good idea, perhaps those disposable plastic paint-tray liners? Oh one last thing. To build a simple-seriously simple cold frame, I am contemplating surrounding the planting area with straw bales. Setting an old glass sliding door atop. It is so old there is no chance the glass is treated with UV film. I was going to keep a thermometer in it to test temps. for some time before planting. Think it should work? Thanks!