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.

Is there still time to do winter chores this March?

With the snow soon to begin melting with warmer temps, fortunately you haven’t missed out on too many garden activities, you just going to have to be ready to do some of the chores in a quick fashion because it’s going to change quickly when it does.

Prevention Spraying with Dormant Oil and Copper Fungicide as long as the buds are hard and it’s a day above 40 you can still spray with the dormant rates on the label. If you miss it follow labels instructions on what to do for the different stages of growth for the plants you are spraying for.

Applying Crabgrass Control. You actually have a lot of time for this as in before May. In fact it would be easier to apply and activate when the irrigation water comes on in April vs applying it when the Forsythia bloom and timing it with rain to activate it.

Dormant Pruning for Roses
This can be done as long as the leaf buds have not begun to pop. The basics for pruning roses are to cut them back to 2 feet then remove diseased, damaged, dead and crossing canes. For climbing roses, go ahead and leave tall just remove the diseased, damaged, dead and crossing canes.

Dormant Pruning Fruit and Berries
This can also be done while the buds are hard. To check this you want to feel the bud with your finger. If it’s hard and doesn’t give or squish under light pressure you are good.

Fertilizing your lawn, trees, shrubs and perennials.
Feeding your plants is a good thing but wait until April like normal because the plant will be awake enough to feed upon the fertilizer as well it is easier to water in with your watering systems.

Cutting back ornamental grasses
Cut them down as soon as the snow melts because once it warms up enough they will begin to grow again for the season and you will only be able to cut them back to as far as they have emerged to.

Cutting back perennials
Either pull off the dead material with your hand or cut it down. Unlike grasses it easier to see the new foliage emerge that you work around it and completely remove all the dead stuff.

Spraying weeds
Round up, Burn Out and other similar herbicides actually work best when temps are in the sixties, so there is plenty of time for this. No need to jump the gun. If the winter weeds are bothering you too much, you can always pull or hoe them out after the snow has cleared.

Applying Pre-emergents
This can be down actually any time of year but it is easier to do when the water is on to water the product in. Just remember to weed or spray the area really good beforehand.

Planting trees, berries and fruit trees
Your time will be short for bare root stuff but potted and B&B trees you have plenty of time.

Planting shrubs and perennials
Most of these plants are potted and can be planted year round. So once the ground is workable again until it’s over 90 you can plant these.

Planting annuals
Annual flowers like petunias and marigolds its best to plant those more toward May when the ground warms up. Primroses and pansies would be good to plant when the snow clears.

Pruning Videos for Berries Bushes

Here are some videos on pruning berries going into spring. Enjoy!

When to prune grasses back and how to do it?

A common question we get is when to prune your grasses for winter. In reality it can be as soon as that plant dies back to the ground. I personally use the grass’ foliage as a winter interest, so I will wait until the winter winds beat then up into a mess. Then I tie a string around the top and cut back to within an inch or two of the ground. For evergreen grasses, I just clean out the dead foliage. With Pampass grass, I wait until spring, using it’s foliage as a mulch to help it survive winter since it’s more tender than other grasses like Switch grass, Japanese Silver grass or Fountain grasses in our area. Below is a video I did to demonstrate how to cut back the different types of grasses.

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.

7 Ways to Make Next Spring Easier

Fall is a great time to start spring off right, be doing a few preventatives.

1. Prevent aphid problems with the Bonide Annual Tree and Shrub Insect Control.  By applying in August/September this gives the insecticide time to move up the tree and prevent attacks in Spring.

2. Prevent weeds in from growing in winter and early spring by applying a pre-emergent herbicides.  Pre-emergent herbicides prevent weed seeds from germinating.  Applying now, after clean weeding a flower bed will help prevent winter weeds from germinating and popping up in early spring. Products to look into are Greenlight Amaze, Preen, Round Up Extended Control. Make sure to follow their watering instructions on these product's labels for best results.

3. Prevent drought stress by applying Bonide Wilt Stop to your soft needle and broad leaf evergreens. It works like like lip balm for our lips to keep their leaves from drying out. Also mark when to water your evergreens in your calendar, it would be best to set it to once a month November through March.  Use a sprinkler on a hose to water since the irrigation is turned off at that time of year. Yews, photinia, boxwoods, arborvitae, rhodies and others benefit from a monthly drink.

4. Help gain an upper hand with root weevil,  by applying Bonide Eight Granules to kill the overwintering larva in the soil, thus reducing their population to help to keep them in check next year.

5. Green up your yellow trees and shrubs that normally should be green by applying the G&B Acid Planting Mix and G&B Harvest Supreme as a mulch or top dressing. By putting about 2 inches thick to slowly leach nutrients into the soil over winter and spring to catch these plants up on nutrients.

6. Clean up disease issues by spraying areas of the yard that had disease issues like rust, powdery mildew, leaf spot, peach leaf curl in November or February with a dormant application of Bonide Liquid Copper Fungicide. This sanitizes the plants to give a fresh start next spring.  For best results make sure to clean up the diseased leaves as well as when you spray, spray the entire plant including the trunk.

7. Get your lawn off to a great start in spring by applying a fall feeding of a Fertilome Winterizer or Fertilome Greenmaker in September/October.  These fertilizers will slowly feed throughout winter to build up the lawns nutrient reserves for a lush push of green growth in spring.

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. 

Tune your Irrigation System for Success

Tuning your irrigation system allows for a more efficient use of water and it's easy.  It also helps prepare your plants for different weather shifts and you apply water based on that irrigation zones conditions.  Both Hunter and Rainbird have free apps to set your run times more appropriately for established yards. Also we have set up links to help determine your yards conditions. Remember that new plantings their first year will need to be babied a bit more but they don't need daily water. 

A link to Hunter's App

A link to Rainbird's App

Things to know as you tune your irrigation timer
-The soil type of your yard: Sand, clay, silt or a mix of the three (loam).  This will help identify how your yard behaves in drainage and moisture retnetion.  Sand has very good drainage and can handle longer run times of sprinklers but needs more frequent runs.  Clay soils hold moisture very well however it does not take to long run times well, short bursts work best to prevent run off and water waste. How to tell soil texture by feel.

-The exposure of that sprinkler zone.  Full sun, afternoon sun or wind exposed sprinkler zones dry out faster through evaporation than afternoon shade, mostly shade and wind protected zones.  Thus as you adjust your sprinkler zone times based on their separate exposures. This can be determined by taking time to walk around the house a couple of times of day and observe what area is sunny and what area is in shade at what time of day and for how long. Do this on a lazy day off.

-Your type of sprinklers.  Different sprinkles types throw out water at different rates. Common sprinkler types are rotors, impacts, sprays, bubblers and multi-streamrotors. Also if you have drip, what size of emitters are your using. Irrigation System Component Video can help you identify what type of sprinklers you have.

-The grade of the yard. Is it flat or does it slope up or down? The slope of your yard also affect how sprinklers work as well as how water will travel in the yard.  Here is a video to determine slope.

by Alex Job