Using the natural "volunteerism" of plants to grow a garden. Every year I have volunteer plants whether tomato, potatoe, melons, lettuce etc. So I decided to up the ante and use that inclination to my benefit.
I am from Wyoming. We had a lot of snow, normal cold. In March I ordered 24" bubble wrap and taped strips together to make bubble wrap blankets. I lay these blankets on the snow to quick melt and earm the ground. The temperatures under the blanket reached 60 above easy on sunny days. The soil temp 58 to 62 in several weeks.
I took tomato seeds thr end of march and planted in small hills. I covered with bubble wrap. The third week of April seen tomatoes coming up. I thinned in May. I planted on the worse ground my mistake. My plants are loaded with fruit. Now it is freezing so I cover with floating row cover and bubble wrap.
Melons, cukes, etc all come up early direct seeded with bubble wrap. Watch the moisture is all. They dont freeze either. Tent bw as they grow.