posted 14 years ago
How established are your plants? What kind of plants are you growing? Is your soil sandy, loamy, or clay?
Off the cuff I'd say that if you really feel the need to irrigate, just get yourself some soaker hose and bury it under the mulch, yet still on the surface of the soil. Much less disturbance and you don't have to worry about your water line being too deep in the soil.
http://www.greenshireecofarms.com
Zone 5a in Central Ontario, Canada