When to plant bush beans in Gresham, OR

Plant bush beans from seed, directly in the garden in Gresham, May 10 – Jun 21.

Easy Plant seeds in the ground

Why these dates

Gresham's typical last spring frost is March 16. Frost kills bush beans, and warm-season crops also need warm soil. Soil here stays cold for weeks after the last frost, so planting waits until about May 10.

West-side valleys. The Willamette Valley, Puget Sound and southern Oregon valleys. Long frost-free seasons, but soil stays cold and wet into May, so warm crops wait for warm soil, not just the last frost.

Difficulty: Easy
Sun: Full sun
Spacing: 3 inches apart
Planting depth: 1 inch deep
Frost: Killed by frost
First harvest: About 55 days after planting

Step by step

Prepare the bed: loosen the soil and mix in an inch or two of compost.
Plant seeds May 10 – Jun 21, 1 inch deep, 3 inches apart.
Keep the soil evenly moist until sprouts appear, which can take one to three weeks in cool soil.
Harvest: Pick when pods are pencil-thick and before the seeds bulge. Picking often keeps plants producing.

Varieties that do well here

Provider (sprouts in cooler soil)
Blue Lake 274
Royal Burgundy

Watch out for

Seeds rot in cold, wet soil, the most common Northwest bean failure. Wait for warm soil.

Seeds rot in cold, wet soil. Wait until soil is consistently above 60°F.

Common questions

When is the last frost in Gresham, OR?

Typically March 16. In 9 years out of 10, frost is over by April 12. These are 1991–2020 NOAA climate normals for Portland-Troutdale Airport.

Is it too late to plant bush beans in Gresham?

The spring planting window runs through June 21. Later plantings may not have time to produce before the first fall frost, which usually arrives around November 20.

How long until I can harvest bush beans?

About 55 days after planting. Pick when pods are pencil-thick and before the seeds bulge. Picking often keeps plants producing.