Rain barrel collection for garden irrigation

Collecting rainwater from your roof provides free, chemical-free water that plants prefer over chlorinated tap water. A typical 1,000-square-foot roof section collects approximately 600 gallons from 1 inch of rainfall. Standard rain barrels hold 50-65 gallons ($50-120) and connect to downspouts with diverter kits. For raised bed irrigation, gravity-feed rain barrels directly into soaker hoses or drip lines. Since rain barrels provide low pressure (about 0.5 PSI per foot of elevation), elevate the barrel on cinder blocks or a platform (3-4 feet high) to increase gravity flow. For drip systems requiring higher pressure, use a small transfer pump ($30-50) or a battery-operated barrel pump. A single 55-gallon barrel provides enough water for 2-3 deep waterings of a 4x8 bed. Link multiple barrels in series for larger storage. Screen the inlet to prevent mosquito breeding and debris entry. Check local regulations, as some areas restrict rainwater collection. In most states, residential collection for garden use is legal and encouraged. First-flush diverters prevent initial dirty roof runoff from entering the barrel.