Rainline Garden

When to plant dill in Portland, OR

Plant dill from seed, directly in the garden in Portland, Mar 15 – May 17.

Easy Plant seeds in the ground

Why these dates

Portland's typical last spring frost is March 13. In the west-side valleys, the soil is usually ready for dill 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 inches apart
Planting depth
¼ inch deep
Frost
Handles light frost
First harvest
About 60 days after planting

Step by step

  1. Prepare the bed: loosen the soil and mix in an inch or two of compost.
  2. Plant seeds Mar 15 – May 17, ¼ inch deep, 12 inches apart.
  3. Keep the soil evenly moist until sprouts appear, which can take one to three weeks in cool soil.
  4. Harvest: Snip leaves any time. For pickling, cut the flower heads just as they open.

Varieties that do well here

  • Fernleaf (compact)
  • Bouquet
  • Mammoth

Watch out for

Tall plants flop in wind and rain. Grow 'Fernleaf', a compact variety, or give it a stake.

Doesn't like being transplanted; sow it where it will grow. Let a few plants flower to feed beneficial insects.

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 dill in Portland?

The spring planting window runs through May 17. Later plantings tend to struggle in summer heat.

How long until I can harvest dill?

About 60 days after planting. Snip leaves any time. For pickling, cut the flower heads just as they open.

Also plant in Portland around the same time

Planting dates for dill in nearby areas

Full planting calendar for Portland · Dill in every city