I have always had a veg. garden or helped my father when I was a child. It was some thing that he did with me and I did with my son. Now I have a 6 year old grand child who enjoys getting her hands dirty. But she had a teacher say they start thier plants in a hot bed. So I have some old windows that I am building two hot beds (36"X60") with an apex roof. But need to know when to start the seeds, how much water, sunlight, and everthing else about starting seeds in a hotbed. Is it better to have the beds on the ground or can I put them up on legs so I don't have to bend over all the time.