When to plant dill in Pittsburgh, Pennsylvania
April 10 – April 17
Direct-sow outdoors · typical Pittsburgh yearClimate basis: NOAA station Emsworth L/d Ohio Rvr, PA (USC00362574), 6 mi (10 km) from downtown Pittsburgh (ZCTA 15222 centroid), elevation 717 ft, on the 1991–2020 climate normals. Direct-sow dill from approximately the dates above, anchored to the median last spring 32°F freeze (April 24). One year in ten still freezes after May 11.
The Pittsburgh year
- indoors under lights
- in the garden
- frost-free season
- 1-in-10 years still freeze to May 11
Every method, with its sources
Direct-sow outdoors
Apr 10 – Apr 17Illinois: sow in spring one to two weeks before the last frost; Oklahoma State's Table 1 agrees (one or two weeks before). Anchored to the median last spring freeze (Apr 24). University of Illinois Extension · Oklahoma State University Extension
Start seeds indoors
Not calculatedDill is tap-rooted and resents transplanting; the cited guides time direct sowing only.
Transplant outdoors
Not calculatedThe cited extension guides do not time an outdoor transplanting window for this crop.
Fall planting
Not calculatedNo source-backed fall planting rule exists for this crop in the registry, so no fall window is calculated.
Variety assumption: Leaf harvest begins about 40–55 days from sowing.
These windows describe typical years (1991–2020 climate normals), not this year's forecast. Freezes happen outside them — especially in frost pockets, valleys, and urban edges. Watch the forecast before committing tender plants.
Crop rule sources (2)
- University of Illinois Extension: Dill (Herbs) (accessed 2026-07-24)"Sow the seeds in the spring one to two weeks before the last frost."
- Oklahoma State University Extension: Culinary Herbs for Oklahoma Gardens: Culture, Use and Preservation (accessed 2026-07-24)Table 1 planting times relative to last spring frost for common herbs.