Local planting guide · Pacific Northwest
zip 97207
Portland is in USDA hardiness zone 9a, with average winter lows of 20°F to 25°F. The local growing season runs roughly 03/13 through 11/19 (~247 days). This zip falls within the Pacific Northwest growing region.
- USDA zone
- 9a 20°F to 25°F
- Last spring frost
- 03/13
- First fall frost
- 11/19
- Growing season
- 247 days
- Compatible crops
- 61
- Growing region
- Pacific Northwest
Right now in Portland
Week 18 priorities
On the docket: transplant out after last frost · direct sow after last frost. See the full calendar →
Gardening in Portland
Portland sits in USDA hardiness zone 9a with minimum winter temperatures between 20 and 25 degrees Fahrenheit. The growing season stretches 247 days from the last spring frost on March 13 to the first fall frost on November 19, giving home gardeners a substantial window for fruit and vegetable production. The maritime influence of the Pacific Northwest shapes the local climate: winters are cold but not severe, summers are moderate compared to inland zones, and humidity remains relatively high through the year. This combination favors deciduous tree crops like apples, pears, peaches, and Japanese plums that need winter chill but benefit from protection against extreme heat. Asian persimmons, figs, pomegranates, and jujubes all thrive in Portland gardens, their hardiness limits rarely the constraint in this zone. The extended fall season gives time for late-maturing crops to mature before November frosts.
Regional context · Pacific Northwest
What the Pacific Northwest brings to Portland
Cool, wet winters and dry summers. Long, mild growing seasons west of the Cascades; short, intense ones east. Famous for berries, hazelnuts, apples, and pears.
Common challenges
Issues that most often defeat home gardeners in zone 9a, drawn from the broader USDA zone profile.
- ▸ Limited stone fruit options due to insufficient chill
- ▸ Hurricane and tropical storm exposure
- ▸ Citrus disease pressure
What defeats new gardeners in Portland
Late spring frosts regularly damage emerging fruit tree buds and flowers. March 13 marks the typical last spring frost, but freezes occasionally occur into late March, catching trees that have already broken dormancy in response to February and early March warmth. Powdery mildew and other fungal diseases thrive in Portland's humid springs and falls, particularly on apples and susceptible stone fruits, while overwatering in spring increases root rot risk. A third constraint is that Portland's moderate summers limit heat accumulation for crops requiring sustained warmth; the 247-day season is long, but temperatures rarely exceed the intensity of zone 9a climates inland.
Crops that grow in Portland
61 crops from our catalog match zone 9a, grouped by type.
Tree fruit
12 crops
zone 9a Apple
Malus domestica
zones 3a–9a
zone 9a Peach
Prunus persica
zones 5a–9a
zone 9a Japanese Plum
Prunus salicina
zones 5b–9a
zone 9a Fig
Ficus carica
zones 7a–10b
zone 9a American Persimmon
Diospyros virginiana
zones 4b–9a
zone 9a Asian Persimmon
Diospyros kaki
zones 7a–10a
zone 9a Pomegranate
Punica granatum
zones 7b–10a
zone 9a Jujube
Ziziphus jujuba
zones 6a–9b
Berries
5 crops
Nuts
4 crops
Vegetables
31 crops
zone 9a Tomato
Solanum lycopersicum
zones 3a–10b
zone 9a Sweet Pepper
Capsicum annuum
zones 4a–10b
zone 9a Hot Pepper
Capsicum species
zones 4a–10b
zone 9a Eggplant
Solanum melongena
zones 5a–10b
zone 9a Potato
Solanum tuberosum
zones 3a–9a
zone 9a Cabbage
Brassica oleracea var. capitata
zones 3a–9b
zone 9a Broccoli
Brassica oleracea var. italica
zones 3a–9a
zone 9a Cauliflower
Brassica oleracea var. botrytis
zones 3b–9a
Herbs
9 crops
zone 9a Basil
Ocimum basilicum
zones 4a–10b
zone 9a Parsley
Petroselinum crispum
zones 3b–9b
zone 9a Cilantro / Coriander
Coriandrum sativum
zones 3b–9b
zone 9a Dill
Anethum graveolens
zones 3b–9a
zone 9a Oregano
Origanum vulgare
zones 4a–9b
zone 9a Thyme
Thymus vulgaris
zones 4a–9a
zone 9a Rosemary
Salvia rosmarinus
zones 7a–10b
zone 9a Sage
Salvia officinalis
zones 4a–9a
Plan the year
Planting calendar for Portland
Year-view of seed starting, transplanting, planting, pruning, fertilizing, harvest, and pest-watch windows tuned to Portland's local frost dates.
Week ? · loading
This week in Portland, OR (zone 9a)
Quiet week in Portland, OR (zone 9a). this week is a good time to step back and plan ahead.
Nothing critical on the calendar this week.
303 bars · 61 crops
Calendar logic combines NOAA frost normals with crop-specific timing data. Local microclimate and weather always overrules the calendar; use this as a starting point.
Top pests for zone 9a
Ranked by how many crops in your zone they affect. Click through for IPM controls and signs to watch for.
Multiple species (Aphididae)
Small soft-bodied sap-sucking insects that reproduce explosively in spring. Excrete honeydew that supports sooty mold and attracts ants. Transmit viral diseases.
Odocoileus species
Whitetail and mule deer browse can devastate orchards and gardens, particularly in winter when food is scarce. Antler rub on young trunks kills saplings outright.
Meloidogyne species
Microscopic soil-dwelling worm that forms galls on roots, reducing vigor and yield.
Multiple species (Chrysomelidae)
Tiny black or bronze jumping beetles that put hundreds of small holes in seedling leaves. Most damaging on direct-seeded brassicas and young eggplant.
Tetranychus urticae
Tiny mite that feeds on leaf undersides, causing stippling and webbing during hot dry weather.
Sylvilagus and Lepus species
Cottontails and jackrabbits strip bark from young fruit trees in winter and graze tender garden vegetables year-round, especially seedlings.
Popillia japonica
Defoliating beetle introduced to North America in 1916. Skeletonizes leaves of many fruit trees, berry canes, and pecan.
Multiple species (Aleyrodidae)
Tiny white moth-like flying insects that feed on plant sap and excrete honeydew. Transmit numerous viral diseases including tomato yellow leaf curl virus.
Top diseases for zone 9a
Ranked by how many crops in your zone they affect. Click through for symptoms, controls, and resistant varieties.
Pseudoperonospora cubensis (cucurbits) and others
Water mold (oomycete, not a true fungus) that thrives in cool damp conditions. Spreads rapidly through cucurbit and brassica plantings on wind-borne spores.
Pythium and Rhizoctonia species
Soil-borne complex of water molds and fungi that kill seedlings before or shortly after emergence. The single most common cause of seed-starting failures.
Cucumber mosaic virus, Tobacco mosaic virus, and others
Family of plant viruses producing mottled yellow-and-green leaf patterns. Vectored primarily by aphids; some are seed-transmitted or spread by handling tools and tobacco products.
Sclerotium rolfsii
Soil-borne fungal disease most damaging in warm humid Southern conditions. White mycelial fans and small mustard-seed-sized sclerotia at the soil line are diagnostic.
Fusarium oxysporum
Soil-borne fungal disease that plugs vascular tissue and kills affected plants. Persists in soil for many years; impossible to eliminate once established.
Calcium deficiency physiological disorder
Not a true disease but a calcium-uptake disorder caused by inconsistent soil moisture during fruit development. The dominant cause of damaged first-fruit on home tomato plantings.
Verticillium dahliae
Soil-borne fungal disease similar to fusarium wilt but with broader host range and cooler temperature optimum. Persists in soil for 10+ years.
Plasmodiophora brassicae
Soil-borne disease causing characteristic distorted club-shaped roots on brassicas. Persists in soil for 10-20 years; the dominant brassica pathogen in acidic poorly-drained soils.
Companion planting suggestions
Beneficial pairings drawn from companion data, filtered to crops that grow in zone 9a.
- Peach + Garlic
Garlic planted around peach trees suppresses peach borer and provides general fungal-pressure reduction.
- Fig + Rosemary
Rosemary tolerates the dry sites figs prefer and provides aromatic pest deterrence.
- Jujube + Thyme
Thyme groundcover suits jujube's low-water profile and deters cabbage moth and aphid populations.
- Rabbiteye Blueberry + Thyme
Thyme tolerates the acidic soil and full sun rabbiteyes need and supports beneficial insect populations.
- Blackberry + Garlic
Garlic between blackberry rows reduces fungal pressure on canes during humid weather.
- Everbearing Strawberry + Thyme
Creeping thyme suppresses weeds between strawberry plants without competing for moisture or nutrients.
Soil types reference
Soil texture and pH decide what grows easily on your specific lot. Find the closest match below for crop recommendations and amendment guidance.
Practical tips for Portland
Wait to plant warm-season annuals (tomatoes, peppers, basil) until mid-April to avoid frost damage after March 13. Choose cold-hardy, disease-resistant fruit tree varieties selected specifically for Pacific Northwest conditions rather than general zone 9a recommendations. Create good air drainage on slopes to allow cold air to flow downhill and reduce frost pocket formation; even a modest elevation change helps minimize losses to late March frosts.
Frequently asked questions
- What fruit trees grow best in Portland?
Apples, peaches, and Japanese plums are the most reliable. Asian persimmons, figs, pomegranates, and jujubes all succeed, though fig and pomegranate need sun exposure and good drainage. Pears are excellent but are prone to fire blight, a serious disease in Portland's humid springs.
- When is the last spring frost in Portland?
March 13 marks the typical last spring frost date based on NOAA Climate Normals 1991-2020. Tender plants like tomatoes and basil should not go in the ground until mid-April to account for variability.
- What's the biggest threat to Portland fruit growers?
Late spring frosts arrive just as fruit trees flower, damaging blooms and reducing fruit set. Fungal diseases (powdery mildew, rust, scab) are also persistent due to spring and fall humidity. Site trees in open locations with good air movement and choose disease-resistant varieties.
- Can I grow warm-climate crops like pomegranates here?
Yes, but with care. Pomegranates and figs need full sun (6+ hours), excellent drainage, and a warm microclimate. Plant against a south-facing wall, avoid low spots where cold settles, and select cold-hardy cultivars bred for zone 9a.
- How long is the growing season in Portland?
247 days from March 13 (last spring frost) to November 19 (first fall frost). This is plenty of time for full-season crops, though summer temperatures are cooler than inland zone 9a areas.
- Should I worry about deer in Portland gardens?
Deer browse is common in Portland gardens. Fruit trees are less vulnerable than tender perennials and vegetables, but young shoots may be browsed. Exclude deer with fencing (6 feet tall) or choose less-preferred crops like most fruit trees and pomegranates.
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Frost data: NOAA Climate Normals 1991-2020, station USW00024229. Local microclimates can shift these dates by a week or more.
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