When to plant celeriac in New York, New York
March 30 – April 13
Transplant outdoors · typical New York yearClimate basis: NOAA station New York Cntrl Pk Twr, NY (USW00094728), 5 mi (8 km) from downtown New York (ZCTA 10007 centroid), elevation 130 ft, on the 1991–2020 climate normals. Transplant celeriac outdoors from approximately the dates above, anchored to the median last spring 32°F freeze (March 30). One year in ten still freezes after April 9.
The New York year
- indoors under lights
- in the garden
- frost-free season
- 1-in-10 years still freeze to Apr 9
Every method, with its sources
Start seeds indoors
Jan 19 – Feb 2The UC Master Gardener Program of Sonoma County (University of California Cooperative Extension) says to "Sow seed indoors as early as 10 weeks before the average last frost date in spring," so the sowing span opens ten weeks before the last frost and runs two weeks; no competing extension figure was found, so this stands without reconciliation. Anchored to the median last spring freeze (Mar 30). University of California Cooperative Extension, UC Master Gardener Program of Sonoma County
Transplant outdoors
Mar 30 – Apr 13The same UC Master Gardener page states plants "can go into the garden 10-12 in. apart on the average date of last frost," a point rule that opens a 14-day transplanting span at the last frost date; the page's alternative air- and soil-temperature condition is not frost-anchored and was therefore not encoded. Anchored to the median last spring freeze (Mar 30). University of California Cooperative Extension, UC Master Gardener Program of Sonoma County
Variety assumption: Assumes a standard 100-to-120-day celeriac variety grown from transplants; germination is slow, so the long indoor lead time is part of the published rule rather than an added buffer.
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 (1)
- University of California Cooperative Extension, UC Master Gardener Program of Sonoma County: Celeriac (accessed 2026-07-25)"Sow seed indoors as early as 10 weeks before the average last frost date in spring."