Frost dates and planting calendar
Winthrop and Twisp, WA
The typical last spring frost in Winthrop and Twisp is May 15, and the first fall frost is around September 22. Plant peas from Apr 3; plant tomatoes from May 20.
NOAA 1991–2020 frost normals, Winthrop station. Where these dates come from
About Winthrop and Twisp
Winthrop and Twisp sit in the Methow Valley at about 1,750 feet, on the dry east side of the North Cascades. Winters bring deep snow.
Chance of frost through the year
Frost over in 9 years out of 10: after Jun 1
Tomatoes go out May 20 – Jun 17, under frost cover at first
- Very likely
- Likely
- Possible
- Unlikely
In 9 years out of 10, the last spring frost has passed by Jun 1 and the first fall frost holds off until Sep 10.
What to plant now
Turn on JavaScript to see what's in season today. The full calendar is below.
Make a garden plan for Winthrop and Twisp Pick your plants and get a dated, printable to-do list.
Inland Northwest. Spokane, Ellensburg, the Okanogan, La Grande, north Idaho, the Magic Valley, eastern Idaho and other higher, colder interior valleys. Cold springs and an earlier fall mean a shorter season; quick-maturing varieties pay off.
Gardening in Wenatchee and the Okanogan. This is orchard country: hot, dry summers and cold winters. Gardens need irrigation, and the summer heat suits tomatoes, peppers and melons; the higher valleys around Winthrop and Twisp have shorter seasons.
How the season in Winthrop and Twisp compares
With 130 frost-free days, Winthrop and Twisp have the 75th-longest season of the 86 Oregon, Washington and Idaho towns we cover. They run from 72 days in McCall to 330 days in Brookings and Gold Beach.
The typical last frost here, May 15, is the latest of the towns we cover in Wenatchee and the Okanogan: 37 days later than Wenatchee and 5 days later than Leavenworth.
The gap between the typical last frost and the date it's over in 9 years out of 10 is 17 days, about average for the towns on this site. Frost after the typical date still happens about half the time, so plan on covering warm crops until June 1.
Even here, sweet potatoes and pumpkins need nearly the whole season, so plant them on time and pick shorter-season varieties when you can.
For a fall and winter garden, sow carrots by July 14 and set out kale plants by July 28. Fall crops here are timed to the first frost (September 22 on average) and to shortening days.
Planting calendar
Pick a group to see when each plant goes in, or search for one.
Salad greens 7 plants
- SpinachPlant seeds in the ground
- Plant Apr 3 – May 8
- Again for fall Jul 28 – Aug 18
- LettucePlant seeds or young plants
- Indoors Feb 20 – Mar 6
- Plant Apr 3 – May 29
- Again for fall Jul 28 – Aug 11
- Swiss chardPlant seeds in the ground
- Plant Apr 17 – Jun 12
- Again for fall Jul 14–28
- ArugulaPlant seeds in the ground
- Plant Apr 3 – May 15
- Again for fall Aug 4–25
- CeleryPlant young plants (starts)
- Indoors Mar 11–25
- Plant May 20 – Jun 24
- MâchePlant seeds in the ground
- Plant Apr 3 – May 8
- Again for fall Jul 21 – Aug 25
- RadicchioPlant seeds or young plants
- Indoors Mar 6–20
- Plant Apr 17 – May 22
- Again for fall Jun 16 – Jul 7
Cabbage family 9 plants
- KalePlant young plants (starts)
- Indoors Mar 6–20
- Plant Apr 17 – May 29
- Again for fall Jul 14–28
- BroccoliPlant young plants (starts)
- Indoors Feb 27 – Mar 13
- Plant Apr 17 – May 22
- Again for fall Jun 30 – Jul 14
- CabbagePlant young plants (starts)
- Indoors Feb 27 – Mar 13
- Plant Apr 17 – May 22
- Again for fall Jun 30 – Jul 14
- CauliflowerPlant young plants (starts)
- Indoors Feb 27 – Mar 13
- Plant Apr 17 – May 15
- Again for fall Jun 23 – Jul 7
- Brussels sproutsPlant young plants (starts)
- Indoors Feb 20 – Mar 6
- Plant Apr 17 – May 29
- Bok choyPlant seeds or young plants
- Indoors Feb 27 – Mar 13
- Plant Apr 3 – May 8
- Again for fall Jul 28 – Aug 11
- KohlrabiPlant seeds or young plants
- Indoors Mar 6–20
- Plant Apr 17 – May 29
- Again for fall Jul 21 – Aug 4
- CollardsPlant young plants (starts)
- Indoors Mar 6–20
- Plant Apr 17 – May 29
- Again for fall Jul 14–28
- Mustard greensPlant seeds in the ground
- Plant Apr 3 – May 15
- Again for fall Jul 28 – Aug 18
Root vegetables 7 plants
- RadishesPlant seeds in the ground
- Plant Apr 3 – May 29
- Again for fall Aug 11–25
- CarrotsPlant seeds in the ground
- Plant Apr 17 – Jun 12
- Again for fall Jun 30 – Jul 14
- BeetsPlant seeds in the ground
- Plant Apr 17 – Jun 12
- Again for fall Jul 14–28
- PotatoesPlant seed potatoes
- Plant Apr 17 – May 29
- TurnipsPlant seeds in the ground
- Plant Apr 3 – May 15
- Again for fall Jul 21 – Aug 4
- ParsnipsPlant seeds in the ground
- Plant Apr 17 – May 29
- Sweet potatoesPlant rooted cuttings (slips)
- Plant May 30 – Jun 20
Tight season: choose an early variety.
Onion family 4 plants
Peas and beans 4 plants
- PeasPlant seeds in the ground
- Plant Apr 3 – May 15
- Bush beansPlant seeds in the ground
- Plant May 22 – Jul 3
Frost possible until about Jun 1: keep frost cover handy.
- Pole beansPlant seeds in the ground
- Plant May 22 – Jun 26
Frost possible until about Jun 1: keep frost cover handy.
- Fava beansPlant seeds in the ground
- Plant Apr 3 – May 8
Tomatoes and summer crops 6 plants
- Sweet cornPlant seeds in the ground
- Plant May 22 – Jun 26
Frost possible until about Jun 1: keep frost cover handy.
- TomatoesPlant young plants (starts)
- Indoors Mar 25 – Apr 8
- Plant May 20 – Jun 17
Frost possible until about Jun 1: keep frost cover handy.
- PeppersPlant young plants (starts)
- Indoors Mar 21 – Apr 4
- Plant May 30 – Jun 20
Frost possible until about Jun 1: keep frost cover handy.
- EggplantPlant young plants (starts)
- Indoors Mar 21 – Apr 4
- Plant May 30 – Jun 20
Frost possible until about Jun 1: keep frost cover handy.
- TomatillosPlant young plants (starts)
- Indoors Mar 25 – Apr 8
- Plant May 20 – Jun 17
Frost possible until about Jun 1: keep frost cover handy.
- Ground cherriesPlant young plants (starts)
- Indoors Apr 1–15
- Plant May 20 – Jun 17
Frost possible until about Jun 1: keep frost cover handy.
Squash, cucumbers and melons 5 plants
- CucumbersPlant seeds or young plants
- Indoors Apr 22–29
- Plant May 20 – Jun 17
Frost possible until about Jun 1: keep frost cover handy.
- Zucchini and summer squashPlant seeds or young plants
- Indoors Apr 22–29
- Plant May 20 – Jun 17
Frost possible until about Jun 1: keep frost cover handy.
- Winter squashPlant seeds or young plants
- Indoors Apr 22–29
- Plant May 20 – Jun 10
Frost possible until about Jun 1: keep frost cover handy.
- MelonsPlant seeds or young plants
- Indoors May 2–9
- Plant May 30 – Jun 20
Frost possible until about Jun 1: keep frost cover handy.
- PumpkinsPlant seeds or young plants
- Indoors Apr 22–29
- Plant May 20 – Jun 10
Tight season: choose an early variety.
Herbs 13 plants
- BasilPlant young plants (starts)
- Indoors Apr 18 – May 2
- Plant May 30 – Jun 27
Frost possible until about Jun 1: keep frost cover handy.
- CilantroPlant seeds in the ground
- Plant Apr 3 – May 22
- Again for fall Aug 4–18
- ParsleyPlant seeds or young plants
- Indoors Feb 20 – Mar 6
- Plant Apr 17 – Jun 5
- DillPlant seeds in the ground
- Plant Apr 17 – Jun 19
- ChivesPlant seeds or young plants
- Indoors Feb 20 – Mar 6
- Plant Apr 17 – Jun 12
- MintPlant young plants
- Plant Apr 17 – Jun 12
- RosemaryPlant young plants
- Plant Apr 17 – Jun 5
- ThymePlant young plants
- Plant Apr 17 – Jun 12
- OreganoPlant young plants
- Plant Apr 17 – Jun 12
- LavenderPlant young plants
- Plant Apr 17 – Jun 12
- SagePlant young plants
- Plant Apr 17 – Jun 12
- Lemon balmPlant young plants
- Plant Apr 17 – Jun 12
- TarragonPlant young plants
- Plant Apr 17 – Jun 12
Berries 10 plants
- StrawberriesPlant young plants
- Plant Apr 17 – May 29
- BlueberriesPlant potted or bare-root bushes
- Plant Apr 17 – Jun 5
- RaspberriesPlant bare-root canes
- Plant Apr 17 – May 29
- BlackberriesPlant bare-root or potted canes
- Plant Apr 3 – May 22
- GrapesPlant bare-root or potted vines
- Plant Apr 3 – May 29
- Hardy kiwiPlant potted vines
- Plant Apr 17 – Jun 5
- HoneyberriesPlant potted bushes
- Plant Apr 3 – May 29
- CurrantsPlant bare-root or potted bushes
- Plant Apr 3 – May 29
- GooseberriesPlant bare-root or potted bushes
- Plant Apr 3 – May 29
- ElderberriesPlant bare-root or potted shrubs
- Plant Apr 3 – May 29
Perennial vegetables 5 plants
- AsparagusPlant dormant crowns
- Plant Apr 17 – May 29
- RhubarbPlant dormant crowns
- Plant Apr 3 – May 15
- ArtichokesPlant young plants (starts)
- Plant Apr 17 – May 29
- SorrelPlant seeds or young plants
- Plant Apr 3 – May 29
- HorseradishPlant root cuttings
- Plant Apr 3 – May 15
Fruit and nut trees 11 plants
- Apple treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Pear treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Plum treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Cherry treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Fig treesPlant potted trees
- Plant Apr 17 – Jun 12
- Peach treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Hazelnut treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Persimmon treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Asian pear treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Quince treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
- Mulberry treesPlant bare-root or potted trees
- Plant Apr 3 – May 29
Native plants 15 plants
- HuckleberriesPlant potted shrubs
- Plant Apr 3 – May 29
- Oregon grapePlant potted shrubs
- Plant Apr 3 – May 29
- Red-flowering currantPlant potted shrubs
- Plant Apr 3 – May 29
- ServiceberryPlant bare-root or potted shrubs
- Plant Apr 3 – May 29
- CamasPlant bulbs
- Fall Sep 25 – Oct 31
- ThimbleberryPlant bare-root or potted plants
- Plant Apr 3 – May 29
- SalmonberryPlant bare-root or potted shrubs
- Plant Apr 3 – May 29
- SalalPlant potted shrubs
- Plant Apr 3 – May 29
- KinnikinnickPlant potted plants
- Plant Apr 3 – May 29
- Western columbinePlant potted plants or seeds
- Plant Apr 3 – May 29
- Douglas asterPlant potted plants
- Plant Apr 3 – May 29
- Oregon sunshinePlant potted plants or seeds
- Plant Apr 3 – May 29
- Pacific ninebarkPlant bare-root or potted shrubs
- Plant Apr 3 – May 29
- Sword fernPlant potted plants
- Plant Apr 3 – May 29
- Oregon irisPlant potted plants or divisions
- Plant Apr 3 – May 29
Flowers 13 plants
- DahliasPlant tubers
- Plant May 20 – Jun 17
Frost possible until about Jun 1: keep frost cover handy.
- SunflowersPlant seeds in the ground
- Plant May 22 – Jul 3
Frost possible until about Jun 1: keep frost cover handy.
- Sweet peasPlant seeds in the ground
- Plant Apr 3 – May 8
- TulipsPlant bulbs
- Fall Sep 25 – Oct 31
- DaffodilsPlant bulbs
- Fall Sep 25 – Oct 31
- ZinniasPlant seeds in the ground
- Plant May 22 – Jul 3
Frost possible until about Jun 1: keep frost cover handy.
- PeoniesPlant bare-root divisions
- Fall Sep 25 – Oct 31
- CosmosPlant seeds or young plants
- Indoors Apr 10–24
- Plant May 22 – Jul 3
Frost possible until about Jun 1: keep frost cover handy.
- NasturtiumsPlant seeds in the ground
- Plant May 22 – Jul 3
Frost possible until about Jun 1: keep frost cover handy.
- MarigoldsPlant seeds or young plants
- Indoors Apr 8–22
- Plant May 20 – Jun 24
Frost possible until about Jun 1: keep frost cover handy.
- CalendulaPlant seeds in the ground
- Plant Apr 17 – Jun 5
- Again for fall Jul 14–28
- RanunculusPlant soaked corms
- Plant Apr 17 – May 22
- SnapdragonsPlant seeds or young plants
- Indoors Feb 6–20
- Plant Apr 17 – May 29
- Start seeds indoors
- Plant in the garden
- Plant again for fall
- Today
- Frost possible
- Frost likely
New to this? Read the beginner's guide or look up a term in the glossary.
ZIP codes that use these dates: 98862, 98856, 98833. Look up another ZIP.
Where these dates come from
The frost dates for Winthrop and Twisp come from the NOAA weather station in Winthrop, at 1,750 feet. It's the closest weather station to Winthrop and Twisp with NOAA's 1991–2020 frost records. It's a NOAA cooperative station, not an airport station.
They're NOAA's 1991–2020 climate normals: 30-year averages, not a forecast. How we pick each town's station.
Common questions about frost in Winthrop and Twisp
When is the last frost in Winthrop and Twisp?
May 15 in a typical year. Frost is over by June 1 in 9 years out of 10, Tender plants like tomatoes wait longer than that, for warm soil: see the tomato question below.
When is the first frost in Winthrop and Twisp?
Around September 22. It comes as early as September 10 in 1 year out of 10.
When can I plant tomatoes in Winthrop and Twisp?
Set out tomato plants May 20 – Jun 17, after starting seeds indoors Mar 25 – Apr 8. Keep frost cover handy until about Jun 1.
When should I plant garlic in Winthrop and Twisp?
Plant garlic cloves Sep 25 – Oct 31, and harvest next summer when the lower leaves turn brown.
How long is the growing season in Winthrop and Twisp?
About 130 frost-free days, shorter than most of the 86 Oregon, Washington and Idaho towns we cover.