Here is a system that I have been using for many years. Two cedar tree posts. wire strung between, a soaker hose, and a sheet of clear plastic tented over the wire. I prepare the soil, plant my seedlings. (Squashes shown.) The sides of the plastic are buried to hold them in place. This will hold unless you have extreme wind. I will keep this on until the end of May , lifting once or twice for weeding. My plants will be ready to bear fruit shortly after. I will plants seeds in a few weeks, and again in the middle of July. I get 3 consecutive planting in to keep us in squash all season. Easy and cheap.