How does the next paragraph end?

How to make a plastic sheet greenhouse
String up a clothesline between two bare trees, tightly, about head-high.
Drape a clear plastic sheet over the clothesline.
A standard 9'x12' size works okay, but for more space the bigger the better.
Clip it with clothes pins to keep it in place. Spread out the sides like an old army pup-tent and fasten them to the ground with rocks or bricks.