City guide · Zone 9a
What to plant in Seattle, Washington
A full-sun bed in Seattle: Gardenia 'Frostproof', Pink muhly grass, Foxglove beardtongue 'Husker Red', Threadleaf coreopsis 'Moonbeam', Angelina stonecrop 'Angelina'. Zone 9a, last frost around Mar 10.
Wet, mild winters and dry summers. Plants that like moisture need summer watering.
Preview: plant data is awaiting horticulturist review. A professional horticulturist hasn't reviewed our plant table yet. Lists still follow fixed rules for zone, sun, pets, deer and invasive status.
Seattle, Washington at a glance
- Hardiness zone (2023 USDA)
- 9a (ZIP 98101)
- Typical last spring frost
- Mar 10
- Typical first fall frost
- Nov 15
- Spring planting window
- After your last frost, until mid-April
- Fall planting window
- late October to mid-December
- Annual rainfall (approx.)
- 38 in
Frost dates are typical metro values, not forecasts. Mild, wet winters and dry summers: winter wet and summer drought matter more than cold for many plants. Our lists for Seattle use the rules for the Pacific Northwest.
Zone: USDA Plant Hardiness Zone Map, 2023 (USDA Agricultural Research Service; data by the PRISM Climate Group, Oregon State University). ZIP code to state data: GeoNames (geonames.org), CC BY 4.0.
A full-sun bed in Seattle
6 or more hours of direct summer sun, 12 × 6 ft.
12 × 6 ft · Zone 9a · 6+ hours of sun · Cottage
Gardenia jasminoides 'Frostproof'
Structure · Back of bed · 3-gallon pot · 2.5 ft apart · grows 3–4 ft tall · May–Jun
Can't find it? Use Upright rosemary 'Tuscan Blue' or Glossy abelia 'Kaleidoscope'.
Muhlenbergia capillaris
Grass · Back of bed · 1-gallon pot · 2.5 ft apart · grows 2.5–3.5 ft tall · Sep–Nov
Can't find it? Use Northern sea oats or Feather reed grass 'Karl Foerster'.
Penstemon digitalis 'Husker Red'
Filler · Back of bed · 1-gallon pot · 1.5 ft apart · grows 2–3 ft tall · May–Jun
Can't find it? Use Garden peony 'Sarah Bernhardt' or Hardy geranium 'Rozanne'.
Coreopsis verticillata 'Moonbeam'
Filler · Middle of bed · 1-gallon pot · 1.5 ft apart · grows 1.5–2 ft tall · Jun–Sep
Can't find it? Use Garden peony 'Sarah Bernhardt' or Hardy geranium 'Rozanne'.
Sedum rupestre 'Angelina'
Edge · Edge of bed · quart pot · 1 ft apart · grows 3–6 in tall · Jun–Jul
Can't find it? Use Cheddar pinks 'Firewitch' or Creeping phlox.
Kinds
5
Plants
30
Coverage
92%
Mulch
9 bags
Mulch: 0.67 cu yd at 3 in deep (9 bags of 2 cu ft). Plants cover about 92% of the 72 sq ft bed when mature.
A part-shade bed in Seattle
2 to 4 hours of direct summer sun, 12 × 6 ft.
12 × 6 ft · Zone 9a · 2–4 hours of sun · Classic
Buxus sinica var. insularis 'Wintergreen'
Structure · Back of bed · 3-gallon pot · 3.5 ft apart · grows 2–4 ft tall · Foliage plant
Can't find it? Use Sasanqua camellia 'Shishi Gashira' or Reblooming azalea 'Encore Autumn Amethyst'.
Holly fern
× 3
Cyrtomium falcatum
Grass · Middle of bed · 1-gallon pot · 2 ft apart · grows 1.5–2 ft tall · Foliage plant
Listed as invasive in Hawaii, New Jersey, South Carolina and Texas in our table. Don't plant it there.
Can't find it? Use Japanese painted fern 'Pictum' or Japanese forest grass 'Aureola'.
Astilbe chinensis 'Visions'
Filler · Middle of bed · 1-gallon pot · 1.3 ft apart · grows 1–1.5 ft tall · Jul–Aug
Can't find it? Use Hosta 'Patriot' or Hairy alumroot 'Caramel'.
Lenten rose
× 7
Helleborus × hybridus
Filler · Middle of bed · 1-gallon pot · 1.5 ft apart · grows 1–1.5 ft tall · Feb–Apr
Can't find it? Use Hosta 'Patriot' or Hairy alumroot 'Caramel'.
Carex morrowii 'Ice Dance'
Edge · Edge of bed · 1-gallon pot · 1.3 ft apart · grows 0.75–1 ft tall · Foliage plant
Can't find it? Use Japanese sedge 'Evergold' or Hairy alumroot 'Caramel'.
Kinds
5
Plants
27
Coverage
83%
Mulch
9 bags
Mulch: 0.67 cu yd at 3 in deep (9 bags of 2 cu ft). Plants cover about 83% of the 72 sq ft bed when mature.
A shady bed in Seattle
Under 2 hours of direct summer sun, 12 × 6 ft.
12 × 6 ft · Zone 9a · Under 2 hours of sun · Classic
Aucuba japonica 'Variegata'
Structure · Back of bed · 3-gallon pot · 4.5 ft apart · grows 4–6 ft tall · Foliage plant
Can't find it? Use Dwarf yaupon holly 'Nana' or Sweetbox.
Autumn fern
× 7
Dryopteris erythrosora
Grass · Middle of bed · 1-gallon pot · 1.5 ft apart · grows 1.5–2 ft tall · Foliage plant
Can't find it? Use Japanese forest grass 'Aureola' or Japanese painted fern 'Pictum'.
Astilbe chinensis 'Visions'
Filler · Front of bed · 1-gallon pot · 1.3 ft apart · grows 1–1.5 ft tall · Jul–Aug
Can't find it? Use Hairy alumroot 'Caramel' or Astilbe 'Fanal'.
Brunnera macrophylla 'Jack Frost'
Filler · Front of bed · 1-gallon pot · 1.5 ft apart · grows 1–1.5 ft tall · Apr–May
Can't find it? Use Hairy alumroot 'Caramel' or Lenten rose.
Carex morrowii 'Ice Dance'
Edge · Edge of bed · 1-gallon pot · 1.3 ft apart · grows 0.75–1 ft tall · Foliage plant
Can't find it? Use Japanese sedge 'Evergold' or Coral bells 'Palace Purple'.
Kinds
5
Plants
30
Coverage
82%
Mulch
9 bags
Mulch: 0.67 cu yd at 3 in deep (9 bags of 2 cu ft). Plants cover about 82% of the 72 sq ft bed when mature.
Guides for zone 9
Questions and answers
- What hardiness zone is Seattle, Washington in?
- Central Seattle (ZIP 98101) is in zone 9a on the 2023 USDA map: the coldest night of an average winter falls between 20°F and 25°F. Suburbs can be half a zone colder.
- When is the last frost in Seattle?
- Typically around Mar 10 in spring and Nov 15 in fall. These are typical dates; any one year can be two weeks earlier or later.
- When should I plant shrubs and perennials in Seattle?
- In spring, after your last frost, until mid-April; in fall, late October to mid-December. Fall planting gives roots a cool, moist season to settle before summer.
- How many plants do I need for a 12 × 6 ft bed in Seattle?
- Our full-sun bed list for Seattle uses 30 plants of 5 kinds, plus 9 bags of mulch.
How this page was made
This page was generated from FloraVista's plant table by fixed rules: the rules engine composed each list for the city's 2023 USDA zone, its region's summers and its state's invasive lists. The frost dates and rainfall are approximate metro values. No person or chat model chose these plants, and no named expert has reviewed this page.
Data status: the plant table is awaiting review by a horticulturist. Check each plant with a local nursery or extension office before you buy.
Sources
- Missouri Botanical Garden Plant Finder, state extension services and the USDA PLANTS database (zones, size, sun, water, bloom, native range)
- ASPCA toxic and non-toxic plant lists (dog and cat toxicity)
- Rutgers NJAES and regional extension deer-resistance ratings
- State noxious-weed and invasive-plant lists and the Invasive Plant Atlas of the US
- Typical US garden-centre listings (pot size and price band)
- USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture. Data by the PRISM Climate Group, Oregon State University.
- ZIP code to state data: GeoNames (geonames.org), licensed under CC BY 4.0.
Generated . How FloraVista chooses plants
