Rainline Garden

When to plant oregano in Portland, OR

Plant young oregano plants in Portland Mar 15 – May 10.

Easy Plant young plants

Why these dates

Portland's typical last spring frost is March 13. In the west-side valleys, the soil is usually ready for oregano around March 15.

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
12 to 18 inches apart
Planting depth
Plant at the depth it grew in the nursery pot
Frost
Handles light frost
First harvest
Pick lightly the first year, freely after that

Step by step

  1. Pick a sunny spot with soil that drains well, and mix in an inch or two of compost.
  2. Plant young oregano plants Mar 15 – May 10, 12 to 18 inches apart. Plant at the depth it grew in the nursery pot.
  3. Water sparingly once established. Rich soil makes the flavor milder, so skip the fertilizer.
  4. Harvest: Cut stems just before flowering, when flavor peaks. Dry bunches upside down in a shady, airy spot.

Varieties that do well here

  • Greek oregano (strongest flavor)
  • Italian oregano
  • Golden oregano

Watch out for

Few pests. Plants sprawl and get woody; cut them back by half in early summer.

A hardy perennial that thrives on neglect. Flavor is strongest just before it flowers.

Common questions

When is the last frost in Portland, OR?

Typically March 13. In 9 years out of 10, frost is over by April 1. These are 1991–2020 NOAA climate normals for Portland International Airport.

Is it too late to plant oregano in Portland?

The spring planting window runs through May 10. Later plantings tend to struggle in summer heat.

How long until I can pick oregano?

Pick lightly the first year, freely after that. Cut stems just before flowering, when flavor peaks. Dry bunches upside down in a shady, airy spot.

Also plant in Portland around the same time

Planting dates for oregano in nearby areas

Full planting calendar for Portland · Oregano in every city