THE GUIDE
The Pacific Northwest Plant Guide
Twelve PNW garden plants — vegetables, fruits, and shrubs — each with its own focused growing guide. Planting dates, varieties that work in cool summers, and the regional gotchas that make Pacific Northwest gardening different.
A tomato that won’t ripen. A pepper that won’t grow. A rhododendron with curling leaves.
PNW gardening runs on a different rhythm than most of the gardening internet assumes. Cool summers, mild winters, acidic soils, and reliable rainfall add up to a region where some plants thrive (kale, lettuce, blueberries, garlic) and others struggle no matter how careful you are (peppers, eggplant, beefsteak tomatoes).
This guide covers the twelve plants Pacific Northwest gardeners ask about most. Each has its own focused article with planting dates, varieties that work in our cool summers, sun and water needs, and the most common diagnostic patterns to watch for. For diagnostic help when something is currently going wrong, see the diagnosis guide.
Vegetables
- Tomato — a regional anxiety. Cool summers slow ripening; choose early varieties.
- Pepper — stubbornly heat-loving in a region that doesn’t reliably deliver heat. Small-fruited types work; bell peppers struggle.
- Squash & zucchini — summer squash thrives despite the powdery mildew. Winter squash needs short-season varieties.
- Cucumber — easier than squash but still mildew-prone. Pickling varieties tolerate PNW conditions better than slicers.
- Lettuce — PNW is excellent lettuce country. Plant for spring and fall, skip July–August.
- Kale — a marvel here. Survives PNW winters with minimal protection; tastes sweeter after frost.
- Garlic — PNW signature crop. Plant cloves in October, harvest in July. Hardneck varieties dominate.
Fruits
- Strawberries — Junebearers thrive here; everbearers struggle. Slugs are the persistent enemy.
- Blueberries — PNW is blueberry country. Soil pH and rainfall are nearly ideal — assuming you pick the right cultivar.
Flowers and shrubs
- Dahlia — Seattle’s flower. Slug protection at sprout time is the make-or-break decision.
- Rhododendron — the PNW signature shrub. Mostly forgiving, but specific — wrong pH or soggy roots will kill them.
- Hydrangea — bloom color depends on soil pH. Pruning at the wrong time eliminates next year’s flowers.
When something goes wrong
Each plant article above includes the most common problems for that plant. For diagnostic depth — what symptoms mean across all plants, what causes them, and how to fix them — see the diagnosis guide.
For the underlying patterns shared across plants:
- Watering problems — over and under
- Sunlight issues — too little is the dominant PNW problem
- Nutrient deficiencies — and why pH lockout is the common PNW issue
- Pests — slugs, caterpillars, beetles
- Diseases — fungal, bacterial, viral
- Environmental stress — heat, frost, transplant shock