Photo by treehugger.com

If you’re considering building a greenhouse, then give some thought to the underground greenhouse known as the Walipini. This type works well even in colder climates as it taps into the thermal mass of the earth to regulate the temperature. On the cost front, you can build a 20 foot by 74 foot underground Walipini greenhouse for around $250-$300, not including labor costs.

For a detailed explanation of the Walipin greenhouse, visit treehugger.com here…

Build A $300 Underground Greenhouse For Year-Round Gardening