Rainline Garden

When to plant bok choy in Wilsonville and Canby, OR

Plant bok choy in the garden in Wilsonville and Canby Mar 1 – Apr 5, either as seeds or as young plants started indoors Jan 25 – Feb 8. For a fall harvest, plant again Aug 20 – Sep 3.

Easy Plant seeds or young plants

Why these dates

Wilsonville and Canby's typical last spring frost is March 16. As a cool-season crop that handles light frost, this crop doesn't need to wait for that date. In the west-side valleys, though, the soil usually isn't ready to work until about March 1.

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 to part shade
Spacing
6 to 10 inches apart
Planting depth
¼ inch deep
Frost
Handles light frost
First harvest
About 45 days after planting

Step by step

  1. Start seeds indoors Jan 25 – Feb 8 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 Mar 1 – Apr 5, 6 to 10 inches apart. If you plant seeds instead, sow them ¼ inch deep.
  4. Water deeply once or twice a week rather than a little every day, and mulch once the soil is warm.
  5. Plant again Aug 20 – Sep 3 for a fall harvest.
  6. Harvest: Cut baby bok choy at about 6 inches tall, or whole heads at full size. Harvest before a flower stalk appears.

Varieties that do well here

  • Joi Choi
  • Toy Choy (baby size)
  • Mei Qing Choi

Watch out for

Flea beetles and slugs chew the leaves. Row cover and iron phosphate slug bait handle both.

Bolts as days lengthen, so get spring sowings in early. Fall crops are the easiest.

Common questions

When is the last frost in Wilsonville and Canby, OR?

Typically March 16. In 9 years out of 10, frost is over by April 7. These are 1991–2020 NOAA climate normals for Aurora State Airport.

Is it too late to plant bok choy in Wilsonville and Canby?

The spring planting window runs through April 5. If you miss it, plant again for fall from August 20 to September 3.

When should I start bok choy from seed indoors in Wilsonville and Canby?

January 25 to February 8, which is 5 to 3 weeks before the March 1 planting date. Or buy young plants at a garden center instead.

Also plant in Wilsonville and Canby around the same time

Planting dates for bok choy in nearby areas

Full planting calendar for Wilsonville and Canby · Bok choy in every city