Learn how to capture the power of the sun to warm your pit greenhouse.
The ideal greenhouse is a dome shape.
A greenhouse should be oriented to receive the most light.
A pit greenhouse relies on ground and solar heat instead of manmade devices.
ILLUSTRATION: KEN KERN
Plants process various colors differently during photosynthesis.
A heliodon is a simulated sun machine.
A model of your greenhouse will provide valuable information on yearly solar exposure.