YOUGROWGIRL has this great information on building a homemade drip irrigation system. From this site, "One of the best ways to provide a steady water supply to your plants without your constant attention is the gradual watering system or drip irrigation. Through this method a device is employed that slowly delivers water into the soil directly around the roots. Commercial watering spikes can be purchased from you local garden centre however, using recycled materials you can make your own drip irrigation system for free. "Click here for instructions.---
http://www.yougrowgirl.com/garden/dripsystem.php
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