If you sow directly into the ground saving plastic bottles might be the perfect mini greenhouse for you, too. When our new sprouts start coming up in the Spring they have several elements to overcome. First, we have bugs that love our fresh little green shoots. You see the new sprouts with beautiful leaves coming out of the ground. To return the next morning to one stumpy green stem. We have also had hail the size of quarters and some cold nights. The plastic bottles have protected them and now that some have reached the top they are ready for the world.
We mainly cover all beans and peas. Use 2L clear plastic or juice bottles with the bottoms cut off & paper removed. Remove lid and push directly over the new sprout. Re-purpose those bottles into MINI GREENHOUSES!