Rainline Garden

When to plant cucumbers in Yakima, WA

Plant cucumbers in the garden in Yakima May 8 – Jun 5, either as seeds or as young plants started indoors Apr 10–17.

Moderate Plant seeds or young plants

Why these dates

Yakima's typical last spring frost is May 8. Frost kills cucumbers, so planting starts once frost risk drops, around May 8. Keep row cover or a frost blanket handy for the first couple of weeks, since a late frost is still possible.

Columbia Basin and low eastern valleys. Hot, dry summers and quick spring warm-up. Warm crops go in earlier than west of the Cascades, and irrigation matters more than rain.

Difficulty
Moderate
Sun
Full sun
Spacing
12 inches apart on a trellis
Planting depth
1 inch deep
Frost
Killed by frost
First harvest
About 60 days after planting

Step by step

  1. Start seeds indoors Apr 10–17 in trays or small pots under a grow light or in your sunniest window. Or skip this step and buy young plants (starts) at a garden center.
  2. Harden off the young plants: about a week before planting, set them outside for a few hours a day, a little longer each day.
  3. Plant them in the garden May 8 – Jun 5, 12 inches apart on a trellis. If you plant seeds instead, sow them 1 inch deep.
  4. Water deeply once or twice a week rather than a little every day, and mulch once the soil is warm.
  5. Harvest: Pick slicers at 6 to 8 inches, before they yellow. Check plants every day or two in midsummer.

Varieties that do well here

  • Marketmore 76
  • Lemon
  • Diva

Watch out for

Powdery mildew in late summer. Grow them up a trellis for airflow and water at the base.

Need warm soil and warm nights. Floating row cover helps in cool springs.

Common questions

When is the last frost in Yakima, WA?

Typically May 8. In 9 years out of 10, frost is over by May 27. These are 1991–2020 NOAA climate normals for Yakima Air Terminal.

Is it too late to plant cucumbers in Yakima?

The spring planting window runs through June 5. Later plantings may not have time to produce before the first fall frost, which usually arrives around October 4.

When should I start cucumbers from seed indoors in Yakima?

April 10 to April 17, which is 4 to 3 weeks before the May 8 planting date. Or buy young plants at a garden center instead.

Also plant in Yakima around the same time

Planting dates for cucumbers in nearby areas

Full planting calendar for Yakima · Cucumbers in every city