What irrigation problems are common in San Francisco?
The city has some conditions that make irrigation different from hot inland areas.
- Overwatering. Fog and cool temperatures mean plants need less water than a controller set to a standard schedule delivers. Soggy soil causes root rot and fungus.
- Wind. Wind pushes spray off target and wastes water. Low-angle nozzles and drip lines reduce this.
- Pressure differences. Water pressure can be high on low streets and weak on hills, so regulators or pressure-compensating parts may be needed.
- Old systems. Leaks, broken heads, and outdated timers are common in older yards.
- Mixed planting. Lawn, vegetables, and drought-tolerant plants on one valve cannot all be watered correctly.
Good zoning solves most of these. Our landscape design page explains how planting groups are planned so each zone makes sense.

