Beaverton, Oregon planting calendar and frost dates
Beaverton is in USDA hardiness zone 9a. The last spring frost typically comes around April 1 and the first fall frost around November 6, giving about 222 frost-free days a year.
- Typical last frost
- April 1
- Typical first frost
- November 6
- Frost-free season
- 222 days
Frost dates in Beaverton
Last spring frost
- March 5Risky: frost later than this in 9 years out of 10
- April 1Typical: a later frost in half of years
- April 26Safe: a later frost only 1 year in 10
First fall frost
- October 19Risky: frost earlier than this 1 year in 10
- November 6Typical: an earlier frost in half of years
- December 1Late: frost before this in 9 years out of 10
The growing season between the typical last and first frosts is about 222 days. Frost here means a low of 32°F at the weather station. A hard freeze (28°F), which damages most hardy crops too, typically ends around February 26 and returns around November 30.
NOAA U.S. Climate Normals 1991-2020 for Beaverton 2 Ssw, 1 miles WSW of the city center. Low-lying and rural spots often frost later in spring and earlier in fall than airports and city centers.
What to plant each month in Beaverton
January
Start indoors: broccoli, cabbages, cauliflower, collard greens, kale, leeks, onions, oregano, parsley, petunias, ranunculus, rosemary, snapdragons
February
Start indoors: black-eyed susans, broccoli, cabbages, cauliflower, chives, cilantro, collard greens, ginger, leeks, lettuce, marigolds, nasturtiums, oregano, parsley, petunias, ranunculus, rosemary, sage, snapdragons, spinach, swiss chard
Plant or sow outdoors: black-eyed susans, blueberries, garlic, grapes, grass seed, hollyhocks, kale, onions, peas, poppies, raspberries, rhubarb, strawberries, turnips, wildflowers
March
Start indoors: cilantro, eggplants, ginger, marigolds, nasturtiums, peppers, ranunculus, zinnias
Plant or sow outdoors: beets, black-eyed susans, blackberries, blueberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, collard greens, dahlias, dill, figs, garlic, gladioli, grapes, grass seed, hollyhocks, kale, leeks, lettuce, onions, parsley, peas, poppies, radishes, ranunculus, raspberries, rhubarb, roses, snapdragons, spinach, strawberries, swiss chard, turnips, wildflowers
April
Start indoors: basil, cantaloupes, celery, cucumbers, eggplants, peppers, pumpkins, tomatoes, watermelons, winter squash, zucchini
Plant or sow outdoors: asparagus, beets, carrots, chives, cilantro, dahlias, dill, figs, garden mums, gladioli, grapes, green onions, lavenders, leeks, lettuce, lilies, marigolds, mints, nasturtiums, oregano, parsley, petunias, potatoes, ranunculus, rosemary, roses, sage, snapdragons, spinach, sunflowers, sweet corn, swiss chard, thyme, zinnias
May
Start indoors: cantaloupes, cosmos, cucumbers, okra, pumpkins, watermelons, winter squash, zucchini
Plant or sow outdoors: asparagus, basil, cantaloupes, cucumbers, eggplants, ginger, green beans, green onions, kentucky bluegrass, peppers, perennial ryegrass, pumpkins, st. augustinegrass, sweet peas, tall fescue, tomatoes, watermelons, winter squash, zucchini
June
Plant or sow outdoors: basil, bermudagrass, cantaloupes, celery, centipedegrass, cosmos, cucumbers, eggplants, green beans, green onions, okra, peanuts, peppers, pumpkins, st. augustinegrass, sweet potatoes, tomatoes, watermelons, winter squash, zoysiagrass, zucchini
July
Plant or sow outdoors: bermudagrass, celery, centipedegrass, cosmos, okra, peanuts, sweet potatoes, zoysiagrass
Plant for fall: brussels sprouts, potatoes, sweet corn
August
Plant or sow outdoors: bermudagrass, centipedegrass, zoysiagrass
Plant for fall: bearded irises, beets, broccoli, brussels sprouts, cabbages, carrots, cauliflower, collard greens, lettuce, peas, radishes, snapdragons, spinach, sweet corn, swiss chard, turnips
September
Plant for fall: azaleas, bearded irises, beets, broccoli, cabbages, carrots, cauliflower, clematis, coneflowers, crocuses, daffodils, daylilies, grass seed, hostas, hydrangeas, kale, lettuce, lilies, ornamental alliums, peonies, radishes, roses, saffron, snapdragons, spinach, swiss chard, tulips, turnips
October
Plant for fall: cabbages, cauliflower, crocuses, daffodils, daylilies, grass seed, hostas, hyacinths, kale, lilies, ornamental alliums, peonies, radishes, saffron, spinach, tulips
November
Plant for fall: crocuses, daffodils, garlic, hyacinths, lilies, ornamental alliums, peonies, tulips
December
Start indoors: onions
Frost dates and zones by ZIP code in Beaverton
Beaverton's 6 main ZIP codes take their frost dates from 3 different NOAA stations: the typical last frost ranges from March 13 in 97225 to April 16 in 97006. The hardiness zone is 8b in 97006, 97007, 97225, and 9a in 97003, 97005, 97008.
| ZIP code | Zone | Weather station | Typical last frost | Typical first frost |
|---|---|---|---|---|
| 97003 | 9a | Portland-Hillsboro Airport, 2.3 mi ENE | Apr 16 | Oct 23 |
| 97005 | 9a | Beaverton 2 Ssw, 2.7 mi SSW | Apr 1 | Nov 6 |
| 97006 | 8b | Portland-Hillsboro Airport, 2.3 mi ENE | Apr 16 | Oct 23 |
| 97007 | 8b | Beaverton 2 Ssw, 2.6 mi ENE | Apr 1 | Nov 6 |
| 97008 | 9a | Beaverton 2 Ssw, 1 mi WSW | Apr 1 | Nov 6 |
| 97225 | 8b | Portland International Airport, 5.9 mi NE | Mar 13 | Nov 19 |
Planting dates for popular crops in Beaverton
| Plant | Start indoors | Plant or sow outdoors | Fall planting |
|---|---|---|---|
| Tomatoes | Apr 2 to 16 | May 28 to Jun 11 | — |
| Strawberries | — | Feb 18 to Mar 4 | — |
| Lettuce | Feb 4 to 18 | Mar 25 to Apr 8 | Aug 7 to Sep 11 |
| Cilantro | Feb 18 to Mar 4 | Apr 1 to 8 | — |
| Basil | Apr 9 to 23 | May 28 to Jun 4 | — |
| Potatoes | — | Apr 4 to 11 | Jul 17 to 24 |
| Garlic | — | Feb 18 to Mar 4 | Nov 6 to 20 |
| Onions | Dec 10 to Jan 21 | Mar 4 to 18 | — |
| Cucumbers | Apr 30 to May 14 | May 28 to Jun 11 | — |
| Pumpkins | Apr 30 to May 14 | May 28 to Jun 11 | — |
| Peppers | Mar 12 to Apr 9 | May 28 to Jun 11 | — |
| Carrots | — | Mar 11 to Apr 1 | Aug 14 to Sep 4 |
| Sweet Potatoes | — | Jun 30 to Jul 7 | — |
| Watermelons | Apr 23 to May 7 | May 28 to Jun 11 | — |
| Sweet Corn | — | Apr 4 to 18 | Jul 31 to Aug 14 |
| Green Beans | — | May 28 to Jun 11 | — |
| Zucchini | Apr 30 to May 14 | May 28 to Jun 11 | — |
| Broccoli | Jan 14 to Feb 4 | Mar 4 to 18 | Aug 21 to Sep 18 |
| Peas | — | Feb 18 to Mar 4 | Aug 14 to 28 |
| Spinach | Feb 18 to 25 | Mar 25 to Apr 8 | Aug 28 to Oct 2 |
| Sunflowers | — | Apr 4 to 25 | — |
| Zinnias | Mar 4 to 11 | Apr 1 to 15 | — |
| Tulips | — | — | Sep 25 to Nov 20 |
| Daffodils | — | — | Sep 25 to Nov 6 |
| Grass Seed | — | Feb 18 to Mar 4 | Sep 25 to Oct 9 |
Nearby cities
- Tigard, OR zone 9a, last frost Mar 13
- Hillsboro, OR zone 8b, last frost Apr 16
- Portland, OR zone 9a, last frost Mar 13
- Vancouver, WA zone 8b, last frost Mar 13
- Gresham, OR zone 8b, last frost Mar 13
- Salem, OR zone 8b, last frost Apr 3
Planting in OregonAbout zone 9aPrintable calendar for Beaverton
Questions
When is the last frost in Beaverton?
Around April 1 in a typical year, based on NOAA's 1991-2020 records for Beaverton 2 Ssw. There is still a 1 in 10 chance of frost after April 26.
What planting zone is Beaverton in?
USDA hardiness zone 9a (2023 map), with parts of the city in zone 8b. The zone tells you which perennials survive the winter; planting dates depend on frost dates instead.
When should I plant tomatoes in Beaverton?
Start seeds indoors April 2 to 16 and set plants out May 28 to June 11.
When is the first frost in Beaverton?
Around November 6 in a typical year, and before October 19 about 1 year in 10.