Rainline Garden

When to plant rhubarb in Wilsonville and Canby, OR

Plant rhubarb crowns in Wilsonville and Canby Mar 1 – Apr 12.

Easy Plant dormant crowns

Why these dates

Wilsonville and Canby's typical last spring frost is March 16. As a hardy perennial, 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
3 to 4 feet apart
Planting depth
Crown buds 1 to 2 inches below the surface
Frost
Hardy perennial; comes back every year
First harvest
Light picking in year two; full harvests from year three

Step by step

  1. Pick a sunny spot with soil that drains well, and mix in an inch or two of compost.
  2. Plant rhubarb crowns Mar 1 – Apr 12, 3 to 4 feet apart. Crown buds 1 to 2 inches below the surface.
  3. Mulch with compost each spring, and cut off flower stalks as soon as they appear.
  4. Harvest: Pull (don't cut) stalks when they're 10 to 15 inches long. Take no more than a third at once, and stop in early summer. Never eat the leaves.

Varieties that do well here

  • Victoria
  • Canada Red
  • Crimson Red

Watch out for

Crown rot in soggy soil. In wet west-side gardens, plant on a slight mound or in a raised bed.

Plant it where it can stay for a decade. Don't pick the first year, and never eat the leaves, which are poisonous.

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 rhubarb in Wilsonville and Canby?

The spring planting window runs through April 12. Potted plants can still go in later if you water them faithfully through their first summer. Fall planting also works well here.

How long until I can pick rhubarb?

Light picking in year two; full harvests from year three. Pull (don't cut) stalks when they're 10 to 15 inches long. Take no more than a third at once, and stop in early summer. Never eat the leaves.

Also plant in Wilsonville and Canby around the same time

Planting dates for rhubarb in nearby areas

Full planting calendar for Wilsonville and Canby · Rhubarb in every city