Washington · zones 6b–9a
When to plant strawberries in Washington.
Sow or transplant between Mar 31 to May 5 in a typical year, keyed to Washington's median last frost around Apr 14. A second, fall sowing fits Aug 19 to Sep 18. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Strawberries dates for a typical Washington season.
1 · Start indoors
Feb 17 to Mar 24
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Mar 31 to May 5
Keyed to the ~Apr 14 last frost. Sow 0" deep, 12" apart.
Fall round
Aug 19 to Sep 18
Counted back from the ~Oct 18 first frost.
Harvest
~90 days later
~1.5 lb per plant over ~8 weeks.
Washington spans more than one climate: Zone 8 is the most common zone, but the state runs 6b to 9a. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
Washington growing notes
Strawberries ripen at two different speeds on two sides of Washington.
Cool marine air stretches the harvest, Basin heat compresses it
Day-neutral strawberries keep flowering and fruiting through the season rather than setting one big flush, and Puget Sound's mild, cool summer, where daytime highs often stay comfortably below what a lot of strawberry country sees in midsummer, lets that continuous production run for months without the heat stress that would otherwise push a plant to shut down and rest. A west-side day-neutral bed can realistically produce from early summer into fall in a normal year.
East of the mountains, the same variety in the same window ripens fruit faster once Columbia Basin summer heat sets in, which sounds like an advantage until the fruit itself is judged: berries that size and color quickly in high heat often soften and lose flavor complexity compared to fruit that ripened more slowly under the west side's cooler conditions. Basin growers do better giving beds extra afternoon shade during the hottest stretch to slow that rush.
Frost at bloom is the one risk both sides share equally
An open strawberry blossom dies outright at 30 degrees regardless of which side of the state a garden sits on, while a bud that has not yet opened tolerates cold into the upper 20s, and both regions see a late frost slip in occasionally after an early warm spell has already pushed plants into bloom, even in Puget Sound's generally milder climate. Covering the row with a lightweight fabric any night the forecast reads 34 degrees or below removes the guesswork.
Ground-level temperature commonly runs colder than the forecast air temperature reported for a wider area, so a forecast sitting just above that mark can still frost a low, open bloom sitting a few inches off the ground; covering ahead of a marginal forecast rather than waiting to see costs little and protects blossoms that, on a day-neutral bed, keep opening in fresh flushes for months rather than setting just once.
Humidity favors the pest that changed picking schedules everywhere
Spotted wing drosophila is the rare fruit fly that does not wait for a berry to soften: it breeds fastest in the humid air common on the west side and lays into fruit still hard and barely starting to blush, unlike older species that only bother already-overripe fruit, which makes west-side beds a higher-pressure environment for this particular pest than the drier Columbia Basin. Picking often through peak season, rather than the once-weekly rhythm that worked against older pests, is the baseline defense either side of the mountains.
Removing any soft, damaged, or overripe berry from the bed at each picking matters as much as the schedule itself, since the pest breeds in exactly that kind of fruit left sitting in the row. Japanese beetles show up here too alongside aphids, and a weekly look at new leaf growth catches aphid colonies early enough to rinse off before they spread through the planting.
In Washington: watch for
The pests that find strawberries here.
A middle-length season, about 187 frost-free days, means strawberry, day-neutral overlaps spotted wing drosophila for a stretch each summer. Check plants every week or two and treat early.
Soft, quickly-rotting ripe berries with tiny larvae inside.
Organic fix: Pick often, chill fast, hang traps, exclude with fine netting.
Metallic beetles skeletonizing the leaves in summer.
Organic fix: Handpick into soapy water; neem.
White powder on leaves, or fuzzy gray rot on the fruit.
Organic fix: Prune for airflow, water at the base, spray neem.
Your season math: Washington gives strawberries about 187 frost-free days, and it needs roughly 90 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting strawberries in Washington: questions
When should I plant strawberries in Washington?+
In a typical Washington year, sow strawberries or set out transplants between Mar 31 to May 5, keyed to the state's median last frost around Apr 14. There's also a fall window: Aug 19 to Sep 18. Your exact dates shift with your ZIP code and microclimate.
When do I start strawberries seeds indoors in Washington?+
Start seeds inside about 6 weeks before set-out: roughly Feb 17 to Mar 24 for a typical Washington season.
What USDA zone is Washington?+
Washington spans zones 6b–9a, mostly zone 8. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many strawberries plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.