Noxious Weeds
- Property owners are responsible for controlling noxious weeds. For a list of noxious weeds in Kittitas County, contact the Kittitas County Noxious Weed Control Board
Resources created by the Master Gardeners of Kittitas County:
Garden Calendars
- January Garden Calendar
- February Garden Calendar
- March Garden Calendar
- April Garden Calendar
- May Garden Calendar
- June Garden Calendar
- July Garden Calendar
- August Garden Calendar
- September Garden Calendar
- October Garden Calendar
- November Garden Calendar
- December Garden Calendar
Helpful Brochures and Publications
- 100 Cold Hardy Trees shrubs and Perennial for Kittitas County
- Apples for the Home Orchard
- Butterfly Gardening
- Coconut Coir
- Composting
- Crabapples–newly revised
- Fairy Gardens
- Firewise Landscaping
- Foodscaping
- Growlights
- Herbs for Kittitas County
- Kitchen Garden
- Lilacs for Kittitas County
- Maple Trees
- Mushroom Cultivation
- Native Plants in the Home Landscape
- Orchard Mason Bees
- Pain Free Gardening
- Poisonous Plants
- Pollinators and You
- Raised Bed Gardening
- Roses
- Seasonal Garden Guidelines
- Soil Identification and Improvement
- Succulent Success
- Tips for Strips
- Training
- Vegetable Gardening in Upper County
- Vegetable Harvest
- Welcome to Kittitas County
- Windbreaks
- Xeriscaping: Art of the Arid Landscaping
General Gardening Information
USDA Plant Zones
- Cle Elum is in Zone 4 (-30ºF minimum temperature)
- Ellensburg is in Zone 5 (-20ºF minimum temperature)
Growing season averages
- 120 days in lower county
- 90-120 days in upper county
Elevation
- Ellensburg 1,520 feet
- Cle Elum 1,930 feet
Precipitation, annual average
- Easton: 53.5″
- Cle Elum: 37.2″
- Ellensburg: 9″
- Vantage: 6.9″
Frost
Average last spring frost
- Ellensburg: May 1
- Cle Elum: May 24
Average first fall frost
- Ellensburg: September 25
- Cle Elum: September 11
Winds
Out of the west and Northwest. The strongest winds come in late spring, decreasing in the summer months. Wind flow should be taken into consideration when planning your planting beds and garden.
Lawn Seed
Mixes of bluegrass and fine-leaf fescues make superior quality lawns and are best suited for our area.
Soil
Alkaline-soils tend to be on the higher side of the pH scale. A list of soil testing labs is available from our office.