Water-Wise Irrigation

Watering your landscape efficiently is one of the biggest ways to save. That’s why it’s so important to use the right kind of irrigation in different areas of your water-wise landscape. Maximize watering efficiency and wave goodbye to waste by customizing your irrigation system to your soil, microclimates, slope and available water pressure.

Turf Areas

Create a zone of its own. Turf areas should be separate from plant beds, with only one type of sprinkler head for matched precipitation. Never mix different types of sprinkler heads in the same zone.

Be in control. Install a weather-based smart irrigation controller to save water and dollars—you can get a rebate!

Water with the weather. Install a rain sensor that automatically shuts o your sprinkler system when it rains. Once installed, apply for a rebate at ThorntonWater.com/rebates.

Cycle and soak. Divide watering time into shorter cycles, with an hour between each cycle, to prevent runoff, promote deeper root growth and maintain a lush, healthy lawn.

Never water midday. Program your controller to run between 6 p.m. and 10 a.m. to reduce water evaporation and enhance water absorption.

Twice a week is enough. Add a third day of watering when temperatures rise.

Give your system a tuneup. Fix broken heads and leaks, correct head spacing, make sure heads have matched precipitation rates and minimize overspray.

Adjust monthly. Consult the Thornton Watering Guide to find out how much water your landscape really needs.

Sprinkler Head Options

Pop-Up Spray Heads

Best suited for small- to moderate-sized lawn areas (7-10 feet wide up to 30-45 feet wide) and irregular or curvilinear areas.

Pop-up spray heads have a high water delivery rate of 1-2½ inches per hour. At the typical rate of 1½ inches per hour, the zone would receive a half inch of water in just 20 minutes.

Rotor Heads

Mechanically rotate to distribute a spray of water. Impact and gear driven heads are most common.

Best suited for large lawn areas, generally 18-24 feet or larger.

Rotors are more uniform in water distribution than pop-up spray heads and take much longer to water, delivering water at a rate of one-fourth to three-fourths of an inch per hour. (At the typical rate of a half inch per hour, it would take 60 minutes to apply a half inch of water.)

Rotary Nozzles

Multi-trajectory rotating streams provide unmatched water distribution uniformity for significant water savings.

They have a lower application rate, which reduces runoff from compacted clay soils and slopes.

Almost any type of sprinkler head can be retrofitted with a rotary nozzle, including spray heads and traditional rotors. Rotary nozzles can apply water to distances ranging from 4-30 feet.

Thornton Watering Guide
Sprinkler Type Rotors Fixed spray nozzles Rotary nozzles Manual sprinklers
May 15 mins / 3 cycles 33 mins / 3 cycles 42 mins / 3 cycles 23 mins
June 22 mins / 3 cycles 48 mins / 3 cycles 61 mins / 3 cycles 34 mins
July 24 mins / 3 cycles 52 mins / 3 cycles 65 mins / 3 cycles 36 mins
Aug 20 mins / 3 cycles 44 mins / 3 cycles 55 mins / 3 cycles 31 mins
Sept 14 mins / 3 cycles 31 mins / 3 cycles 39 mins / 3 cycles 22 mins

TOTAL MINUTES PER ZONE, PER WATERING DAY.
We recommend Cycle and Soak (Break watering times into THREE short cycles) when possible. Reduce minutes if adding a third watering day.

Plant Beds

Group plants according to water and sunlight requirements.

Drip Irrigation

Drip emitters slowly release water directly to the base of plants, allowing it to soak in slowly while cutting back on runoff, evaporation or wind exposure.

How to install it

Use a drip manifold or convert high volume spray heads using a Rainbird 1800-RETRO Spray Kit or Drip Retrofit Kit that will decrease water pressure to the zone. Lay down a half inch poly tubing around the plant bed area. Punch the emitters directly into the lateral dripline next to plant. If your plants aren’t close to the mainline, attach a quarter inch micro tubing to the emitter and extend tubing to the base of the plant.

Micro-Spray Irrigation

Micro-spray systems slowly emit large droplets or fine streams of water just above the ground, allowing it to cover several plants and soak in with less runoff, evaporation or wind exposure than traditional sprinklers.

How to install it

Use a drip manifold or convert high volume spray heads using a Rainbird 1800-RETRO Spray Kit or Drip Retrofit Kit that will decrease water pressure to the zone. Lay down a half inch poly tubing around the plant bed area. Punch a barbed connector directly into the lateral dripline every 5 to 6 feet. Attach a quarter inch micro tubing to the connector and extend tubing to the micro sprinkler. Insert a drip steak into the ground with micro sprinkler 7 to 9 inches above ground.

Soaker Hose Irrigation

Soaker hoses have perforations or holes that slowly deliver a higher water-to-soil flow rate, allowing it to soak deep, establishing root systems with minimal waste.

How to install it

Place your soaker hose on top of the soil. Put mulch over the soil and hose to deter evaporation.

Manual Watering

Use a hose-end sprinkler that sprays close to the ground and emits larger droplets to minimize loss due to wind and evaporation.

How to install it

Install a timer between the spigot and your hose to make manual watering more efficient.

Trees And Shrubs

Trees and shrubs located in turf areas do well with normal lawn irrigation, but they will need one to three additional deep watering sessions when the weather heats up in July and August.

You’ll want to water newly-planted trees and shrubs frequently, until root systems are established.

Drip irrigation is an efficient way to water isolated shrubs and smaller trees (less than 4 inches trunk diameter), but it’s not appropriate for larger trees. Adjust the number of drip emitters used for each plant and the flow rate for each emitter based on the size of the plant. The goal is to adequately water the root zone (not the trunk) without wasting water.

Money-Wise Tip

Changing watering systems can be spendy. Save water and dough by converting an already existing zone using a low-pressure drip conversion kit. Pick one up at your local garden center, or ask an irrigation specialist about water-effiecient options that work swimmingly with your existing system.

Get Inspired
Download The PDF