Phoenix Irrigation Changes Before Replanting a Yard

Audit the Existing Valve Groups

Phoenix’s Landscape Watering guide explains that trees, shrubs and succulents sharing a valve can have different needs. It discusses adjusting emitter output and distribution when plants cannot readily be separated. Ask the irrigation contractor to walk each zone while it runs and mark every outlet on a simple drawing.

Record plant size, emitter count and whether water reaches the intended area. Broken tubing, buried emitters and overspray should be priced as repairs before anyone promises savings from new equipment. Photograph the valve box and controller labels for future reference.

Protect the Plants That Stay

A mature tree may have depended on water from surrounding lawn or older irrigation. Tell the designer which trees are being retained and ask for an explicit transition plan before removing that supply. The city’s guide emphasizes that watering needs change as plants grow and with soil, season and establishment.

Ask how the proposed layout distinguishes newly installed plants from established ones. Specify whether each planting area gets its own valve or shares a schedule with adjusted emitters. Avoid a bid that lists drip conversion without explaining what continues to water the existing trees.

Create a Schedule You Can Adjust

Phoenix Water Smart recommends regular checks for irrigation leaks and sprinkler performance. Build those checks into the handoff: the contractor should demonstrate every zone, show how to stop watering after rain and explain which settings change through the year. Request a written starting schedule tied to the actual plants and site.

Do not copy one neighbor’s minutes into your controller. Different emitters deliver different amounts of water. Ask the provider to explain the relationship between emitter flow, runtime and frequency using your installed components rather than a generic lawn schedule.

Measure the Conversion After Installation

Keep utility usage records and note the date each area changes. Compare patterns over comparable weather and occupancy periods rather than judging the project from one bill. A leak repair, new planting and exceptionally hot spell can affect the same month.

The closeout package should include a zone map, component specifications, controller instructions and a follow-up visit after the plants have been observed. Make adjustments part of the scope, especially where retained trees and new small plants share space. This creates a maintainable system when a different gardener takes over.

• Which plants share each valve, and why?
• Which existing leaks will be repaired before programming?
• Who checks coverage and plant response after installation?

Sources And Local Resources

Official sources checked October 17, 2026. Confirm current requirements with the authority responsible for your property.

• Phoenix Landscape Watering GuidePlant-specific watering, valve grouping, emitter changes and seasonal adjustments.
• Phoenix Water Smart ConservationIrrigation leak inspections, overspray reduction and routine system checks.