dripline

Dripline is a term with two related meanings in horticulture and irrigation. In its most common sense it denotes the line on the ground directly beneath the outer edge of a plant's canopy—the dripline. That boundary roughly marks the extent of the plant’s foliar reach and is often used as a practical reference for designing planting layouts, applying mulch, and estimating the plant's root zone.

In horticulture, the dripline helps guide irrigation and fertilization. Water and nutrients are typically targeted within the dripline to efficiently supply the root system while limiting waste. The concept is used when selecting planting density, mulch depth, and protective measures against weed growth.

Drip irrigation line: In irrigation technology, drip line refers to a network of tubing with emitters that delivers water slowly at or near the soil surface. This system aims to provide uniform soil moisture with minimal evaporation and runoff. Typical components include a mainline or distribution pipe, submains, emitters (drippers) or perforated tubing, filters, pressure regulators, and a timer. Design considerations include emitter flow rate, spacing, crop needs, soil type, humidity, and sun exposure. Maintenance includes flushing to remove sediment, replacing clogged emitters, and inspecting for leaks.

Other usage: In building and architecture, the term dripline or drip line can describe the line along which rainwater drips from a roof edge, used in drainage planning and landscaping beneath eaves.