I have never grown celeriac, but a good rule of thumb is to transplant when 4 TRUE leaves develop.

Sarah

Hi tournesol,

I'm growing Celeriac for the first time this year as well. How long did it take for your seeds to sprout?

I'm also interested in the time to plant outdoors. Can these be planted out before the last frost date?

Jon

tournesol and jon, i grow celeriac just about every year from seed. I would transplant 3" seedling into individual pots now (i use square ones about 3.5"), put those into a flat and under lights. they'll develop a good root system and they sure look sweet, like miniature greenhouse foliage plants. then, whenever the soil and temps are right outside in your zone, you can plant them out. they're reasonably cold hardy and I wouldn't worry about a maverick frost, though if it's severe you might cover them up. it's good to get them out as early as possible, so you have nice big knobs by the end of summer and early fall. the one thing they need is constant moisture, so be sure to mulch them fairly heavily. GaryStPaul

Thanks garystpaul.

My seeds sprouted today, that's seven days since I planted them. Good Luck tournesol.

Jon