2023 Irrigation Shut Off Dates for the Area and End of Season Watering Tips

October brings the end to the irrigation water season, and we wanted to share when several of the local irrigation districts are ending the irrigation water season and some tips for your landscape to make it through winter better.

Irrigation Districts
Benton Irrigation District Oct 13th
Badger Mountain Irrigation District Oct 20th
Columbia Irrigation District Oct 13th
City of Pasco Irrigation Oct 16th
City of Richland Irrigation Oct 16th
East Columbia Irrigation District Oct 23rd
Franklin County Irrigation District Oct 23rd
Kennewick Irrigation District Oct 11th
South Columbia Irrigation District Oct 23rd

Before the water goes off
-Ensure everything in the yard gets a good drink; nothing is dry or wilting.
-Deep soak evergreens, and then make a recurring phone/calendar reminder to check the evergreens once a month through March.
-Make a fix list to repair before spring if sprinklers or valves are leaking, broken, or haven’t worked correctly.
-Review this list of plants that do well getting a drink in winter.

After the irrigation, the irrigation water is off.
-Clean your filters. That way, they are good to go in spring.
-Get your sprinkler lines blown out
-Disconnect your hoses from outdoor faucets
-Drain garden hoses when not in use
-Clean your sprinkler screens, inspect the sprinklers for wear and tear like springs, nozzles, or threads repair if needed
-Put your irrigation timer either in standby mode or off, depending on model or brand recommendations for winter storage. There is no need to have your valves turned on and off all winter.
-Consider upgrading your irrigation timer if it’s hard to program for modern smart controllers that use phone apps for programming vs the mystery dial.

What can be planted in fall?

Fall is upon us and it’s time for planting. Here is what you can plant now and into winter as well as a few tips to make sure things go well.

You can plant plants rated zone 6 or lower for they can withstand our winters. You can plant trees, shrubs, perennials, roses and evergreens.

Even though the irrigation systems are going offline. Plants aren’t using much water. Until deciduous plants drop their foliage check on them for moisture weekly. After they drop their foliage check monthly to see if they need a drink. Evergreens need water on a monthly basis. Water on days where the highs are above 35 degrees.

For roses you want to mulch their crowns as a precaution against sudden cold snaps.

You can plant in fall and into winter you want to avoid cold snaps where on daytime temps don’t rise above freezing. It’s hard on you and the plants when the ground is frozen.

When does the irrigation water go off for 2018?

October 2018 is here and for irrigation water, it’s the end of the season. Here are the end dates for the different irrigation districts.

Badger Mountain Irrigation District Oct 19th
Benton Irrigation District Oct 12th
City of Pasco Irrigation Water Oct 15th
Columbia Irrigation District Oct 15th
East Columbia Irrigation District Oct 22nd
Kennewick Irrigation District Oct 10th
Quincy-Columbia Basin Irrigation District Oct 24th
Roza Irrigation District Oct 18th
South Columbia Basin Irrigation District Oct 23

What we recommend doing before the water turns off is to make sure all you trees and shrubs get a good drink. Then after the irrigation water shuts off, especially for evergreens is that they get checked for moisture monthly and watered if dry. An easy way to remember is to put a reminder on your phone’s calendar.

Do you have scale?

Scale is a sap sucking insect that resembles an oyster shell that either cover branches like the tree pictured above or on the foliage of arborvitae.  They can be challenging to control for when their shells are soft, insecticides work; when they are hard they do not.  For deciduous trees you can use a systemic insecticide like the Bonide Annual Tree and Shrub insect control.  For evergreens it would be better to use a horticultural oil like Bonide All Seasons Oil or Malathion to kill the scales.  

An few signs you have scale is if you see shells on branches (not normal), the foliage is sticky or there are a lot of flies hanging around you plants (this also is a sign of aphids too).

It’s time to feed your plants!

Early April is when the irrigation water come back online is a great time to feed you trees, shrubs, and perennials.

For your plants you can use granulated fertilizers or fertilizer spikes.  Which ever is easiest for you to apply.  I find it faster and easier to use granulated; this is mainly because I have a lot of shrubs and my soil is very rocky.   I just measure the size of plant and give it the appropriate amount listed on the label and then onto the next plant. Once I am done fertilizing I run my irrigation system to activate the fertilizer. 

Three of my favorite plant foods for trees, shrubs and perennials are the Fertilome Azalea, Camelia and Rhododendron Food, the Fertilome Start n Grow and the G&B Paradise (organic).  The Fertilome Azalea, Camelia and Rhododendron Food is great for plants that like acidic conditions like Rhodies, Dogwoods and Maples; you apply this one three times a year April, Memorial Day and Mid August.  The Start-N-Grow is a good universal plant food full of trace elements that you only have to apply twice a year April and July. Paradise is a granulated organic fertilizer that is full of enzymes and trace elements to feed plants, apply in April, June and August. Any of them will yeild happy well fed plants!

Here is an idea to control Bermudagrass

Bermudagrass is problem for a lot of Tri-City lawns.  It is the grass with deep roots and runs it's tendrils throughout the yard spreading where ever it feels like it.   Bayer has come out with Bermudagrass Control for lawns, it is a growth regulator that supresses the growth of the Bermudagrass and lets your preferred lawn to choke it out.  Timing is critical on applying it, you want to hit the Bermudagrass when it begins to emerge in early April, then repeat applications on a monthly basis until it is no longer trying to grow.  Easy to apply with the Read to Spray Bottle (RTS), just hook to a hose and begin spraying only the affected areas of the lawn.  Be sure to let the product dry completely after application, before letting kids or pets back on the lawn.   We stock it regularly here at Job's.

My Hibiscus aren’t awake yet! Are they OK?

The dayliies are up, the black eyed Susans are waking up, even the salvias are peeking out of the ground, however the Hibiscus are still the cut back stalks that you left them back in February.  Did they survive the winter?

The answer is yes, they most likely did survive the winter. They just are waiting for the ground to warm up a little more before they show sings of life.  Wait until Mid May to see what peeks up.