Watering Schedule

Watering Schedule

Your outdoor monthly water allocation is based on drought tolerant landscape irrigated with a water efficient system such as drip. It is no longer based on warm season turf.

If you have a lawn and maintain your current watering schedule, you will likely be over your allocation and your water bill will go up.

The schedules below are a suggested weekly watering schedule for drip irrigation for drought-tolerant plants. 

Start with this schedule and adjust the times only if your plants show signs of stress. 

Drip Irrigation Schedules - Rainbird

You can download the schedule here for future use. 

Rainbird XFD
Emmiter Spacing 18''
Row Spacing 18''
0.6 GPH/PR=0.43''
Emmiter Spacing 12''
Row Spacing 18''
0.9 GPH/PR=0.96''
Month
Drought Tolerant Plants
(Moderate Water Use Kc=.5)
Drought Tolerant Plants
(Moderate Water Use Kc=.5)

January

1 day, 1 cycle of 50 minutes

1 day, 1 cycle of 22 minutes 

February

1 day, 1 cycle of 56 minutes

 1 day, 1 cycle of 25 minutes

March

2 days, 1 cycle of 39 minutes

2 days, 1 cycle of 17 minutes 

April

2 days, 1 cycle of 47 minutes

2 days, 1 cycle of 21 minutes 

May

2 days, 1 cycle of 56 minutes

2 days, 1 cycle of 25 minutes 

June

3 days, 1 cycle of 37 minutes

3 days, 1 cycle of 16 minutes 

July

3 days, 1 cycle of 38 minutes

3 days, 1 cycle of 17 minutes 

August

3 days, 1 cycle of 39 minutes

3 days, 1 cycle of 17 minutes 

September**

2 days, 1 cycle of 48 minutes

2 days, 1 cycle of 22 minutes 

October**

2 days, 1 cycle of 27 minutes

2 days, 1 cycle of 16 minutes 

November**

1 day, 1 cycles of 54 minutes

1 day, 1 cycle of 24 minutes 

December

1 day, 1 cycle of 44 minutes

1 day, 1 cycle of 20 minutes 

Drip Irrigation Schedules - NETAFIM Techline CV
NETAFIM Techline CV
Emmiter Spacing 18''
Row Spacing 18''
0.4 GPH/PR=0.3''
Emmiter Spacing 12''
Row Spacing 18''
0.6 GPH/PR=0.65''
Month
Drought Tolerant Plants
(Moderate Water Use Kc=.5)
Drought Tolerant Plants
(Moderate Water Use Kc=.5)

January

1 day, 1 cycle of 72 minutes

1 day, 1 cycle of 33 minutes 

February

1 day, 1 cycle of 80 minutes

 1 day, 1 cycle of 37 minutes

March

2 days, 1 cycle of 56 minutes

2 days, 1 cycle of 26 minutes 

April

2 days, 1 cycle of 67 minutes

2 days, 1 cycle of 31 minutes 

May

2 days, 1 cycle of 81 minutes

2 days, 1 cycle of 37 minutes 

June

3 days, 1 cycle of 53 minutes

3 days, 1 cycle of 24 minutes 

July

3 days, 1 cycle of 55 minutes

3 days, 1 cycle of 25 minutes 

August

3 days, 1 cycle of 56 minutes

3 days, 1 cycle of 26 minutes 

September**

2 days, 1 cycle of 69 minutes

2 days, 1 cycle of 32 minutes 

October**

2 days, 1 cycle of 52 minutes

2 days, 1 cycle of 24 minutes 

November**

1 day, 1 cycles of 78 minutes

1 day, 1 cycle of 36 minutes 

December

1 day, 1 cycle of 63 minutes

1 day, 1 cycle of 29 minutes 

Sprinkler System

This is a suggested weekly schedule for spray-head irrigation for drought-tolerant plants, not turf. Customer water rates are now calculated based on drought-tolerant plants and not turf.

It assumes heavy clay soils common to most of IRWD's service area. Generally, these are the MAXIMUM times you will need for full sun areas. Start with this schedule and adjust the times only if your plants show signs of stress. If stress occurs only in isolated areas, check the operation of your irrigation system before adjusting the times. 

Month
Drought Tolerant Plants

January

1 day, 2 cycles of 3 minutes

February

1 day, 2 cycles of 3 minutes

March

2 days, 2 cycles of 3 minutes

April

2 days, 2 cycles of 4 minutes

May

2 days, 3 cycles of 3 minutes

June

3 days, 2 cycles of 3 minutes

July

2 days, 3 cycles of 4 minutes

August

2 days, 3 cycles of 4 minutes

September**

2 days, 2 cycles of 4 minutes

October**

2 days, 2 cycles of 3 minutes

November**

1 day, 2 cycles of 4 minutes

December

1 day, 2 cycles of 3 minutes

 

*By "cycling" the irrigation controller to turn on for the recommended number of minutes an hour apart, deeper watering and healthier root growth are gained, while runoff is reduced.

** In September, plants' water needs drop by approximately 30 percent even if the temperature is hotter, because the days are shorter, so evaporation decreases. Also plants begin to go into a dormant phase where they need less water. In some years, humidity is also higher, increasing your level of discomfort, but decreasing plants' water needs as it slows the rate of evaporation. This rapid drop in water needs will continue in October and November.

 

 

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