How long do carrot seeds take to germinate?
Carrot seeds sprout in 10-21 days at an optimal soil temperature of 55-75 °F. Use the planner to estimate days and a sprout date for your soil temperature.
Quick answer
Germination planner
Temperature range & printable card
Notes & troubleshooting
A cool-season crop, direct-sown (carrots do not transplant well). The seed is slow and the bed surface must stay consistently moist for the full 1-3 weeks — the most common cause of failure is a dry crust.
If they will not sprout
- Dry-out: never let the surface crust dry; cover with a board or shade cloth until sprouting.
- Slow start: carrots are naturally slow (up to 3 weeks); do not give up early.
- Old seed: carrot seed is short-lived (~3 years); use fresh seed for even stands.
Sources & how the planner works
The germination range (40-95 °F), optimal band (55-75 °F), 10-21 days to germinate, and 1/4 in sowing depth are curated from the sources below and last reviewed 2026-06-18.
The germination planner is DETERMINISTIC interpolation over the cited temperature ranges, not a prediction model. Below the minimum soil temperature, seeds are flagged as unlikely to germinate (and may rot); within the optimal band they sprout fastest (toward the low day count); between minimum and optimal they sprout slower (toward the high day count); above the maximum, germination drops or seeds go dormant. The 'sow date -> sprout window' is simply the sow date plus the expected day range for the chosen temperature band. It is general guidance, not a zone-based planting calendar.
General seed-starting guidance only. Soil temperature (not air temperature) drives germination; use a soil thermometer for best results. Verify timing for your specific variety and region; extension services publish local recommendations.