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![Dripwall Delta](https://farmhack.org/sites/default/files/reference%20design%20delta%20dripwall%20heat%20movers_0.png)
Dripwall Delta
The Dripwall delta collects solar heat in a drip of water and transfers that heat under the soil to keep roots warmer. It is a season extender that lets you start seedlings a lot earlier and also the heat stored under the soil protects seedlings from night frost.