Rainline Garden

When to plant eggplant in Walla Walla, WA

Start eggplant from seed indoors Feb 20 – Mar 6, then plant the young plants in the garden in Walla Walla May 1–22.

Tricky here Plant young plants (starts)

Why these dates

Walla Walla's typical last spring frost is March 27. Frost kills eggplant, and warm-season crops also need warm soil. Soil here stays cold for weeks after the last frost, so planting waits until about May 1.

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
Tricky here
Sun
Full sun; the hottest spot you have
Spacing
18 to 24 inches apart
Planting depth
Plant starts at the depth they grew in the pot
Frost
Killed by frost
First harvest
About 80 days after planting

Step by step

  1. Start seeds indoors Feb 20 – Mar 6 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 1–22, 18 to 24 inches apart. Plant starts at the depth they grew in the pot.
  4. Water deeply once or twice a week rather than a little every day, and mulch once the soil is warm.
  5. Harvest: Pick when the skin is glossy and springs back when pressed. Dull skin means it's overripe and seedy.

Varieties that do well here

  • Hansel (early, small fruit)
  • Fairy Tale
  • Orient Express

Watch out for

Flea beetles riddle young leaves, and cool nights stall growth. Keep row cover on until plants are growing strongly.

Needs even more heat than peppers. Small-fruited, early varieties do best west of the Cascades, helped by black plastic mulch or a warm wall. Hot eastern valleys grow them easily.

Common questions

When is the last frost in Walla Walla, WA?

Typically March 27. In 9 years out of 10, frost is over by April 22. These are 1991–2020 NOAA climate normals for Walla Walla Regional Airport.

Is it too late to plant eggplant in Walla Walla?

The spring planting window runs through May 22. Later plantings may not have time to produce before the first fall frost, which usually arrives around October 31.

When should I start eggplant from seed indoors in Walla Walla?

February 20 to March 6, which is 10 to 8 weeks before the May 1 planting date. Or buy young plants at a garden center instead.

Also plant in Walla Walla around the same time

Planting dates for eggplant in nearby areas

Full planting calendar for Walla Walla · Eggplant in every city