Teeny Tiny Greenhouse
If you don’t need a greenhouse the size of well, a small house- or even as big as the greenhouse bins we saw earlier on this list, consider a soda bottle. Cut the bottom in half and place into dirt over the seedling.
The warmer air will become trapped in the bottle, and will also protect your little seed from wind, rain, and even other animals that might come through your garden. If you know a freeze is on the horizon, take some bottles outside and place them over your most precious little plants. This is sure to help them make it.