The Large Garden Drip Irrigation Kit is a strong drip irrigation system that directly applies water to the rows at the soil level. This irrigation kit also reduces water loss through evaporation. Each dripper emits water at 0.6 GPH (1 gallon per minute over the 100' line). For example, a mulched perennial garden needs 10-15 minutes of irrigation every 24 hours or 10-15 gallons per day for the 100' line.