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Vegetable Crop Calendars (A–C)Carrot Planting Calendar and Succession Timing
Carrots are slow to germinate and easy to lose to a dry crust, so good timing means more than picking a date. It means planning moisture, soil and repeat sowings.
Key points
- Sow carrots a few weeks before last frost when soil is workable.
- Keep the seedbed moist until sprouts appear.
- Sow short rows every two to three weeks.
- Count back from first frost for the last fall sowing.
- Use loose soil and avoid excess nitrogen.
When can you start sowing carrots?
Carrots can be sown a few weeks before your average last spring frost, once the soil can be worked. Seed is slow in cool soil, sometimes taking a couple of weeks to emerge, but cold alone rarely kills it. Check your state guide for the recommended lead time.
Soil temperature affects speed. A thermometer in the seed row tells you more than the weather forecast.
If spring is short in your area, think of carrots as a fall crop first. Many gardeners find that roots maturing in cool autumn weather are sweeter and less likely to turn bitter than those grown in summer heat. Be realistic about what the seed needs. Old seed loses vigor, so buy fresh packets each season or test an older packet on a damp paper towel before committing a whole row to it.
How do you keep carrot seed moist long enough?
The hardest part of carrots is keeping the surface damp through the long germination period. A crust that forms on bare soil can block tiny seedlings. Water lightly and often, or lay a board or burlap over the row and check daily, removing it as soon as sprouts appear.
Sow shallow, and cover with fine material rather than clods. Consistent moisture matters more than heavy watering.
Some gardeners mix carrot seed with sand to sow more evenly, which reduces later thinning. Whatever method you choose, aim for even spacing at planting.
- Prepare a fine, stone-free seedbed.
- Sow shallow and firm lightly.
- Keep the surface moist until emergence.
- Remove any cover at first sprouts.
How do you plan succession sowing?
A short row every two to three weeks gives you tender roots for months. Stop sowing a spring series when the days get hot enough that seedlings struggle, and start again in summer so roots mature in the cool part of fall.
For example, if your first fall frost usually arrives in late October, you would count back from that date using the days to maturity on your packet, add a margin and sow a late batch. Dates here are only an illustration, so use your own frost data.
Carrots left in the ground can be mulched deeply and harvested into winter in many regions. Check your state guide for how late you can harvest. Mark each sowing date on a stake. When harvest time comes, you will know which row is ready without digging test roots.
What soil makes straight roots?
Loose, deep, stone-free soil grows straight roots. Compacted or rocky soil causes forking and stunted roots. Take a soil test and follow local recommendations, avoiding fresh manure or excess nitrogen, which often cause hairy or forked roots. Nutrient management rules vary by state.
Raised beds or deeply loosened rows help in heavy clay. Short, round varieties are an option for shallow or heavy ground.
A soil test reveals pH and nutrient levels. Your extension office can explain which amendments are worthwhile and when to apply them. Deeply loosened soil lets roots go straight down. Remove stones from the top foot or so before sowing, and avoid walking on prepared rows.
When do you thin and weed?
Thin seedlings once they are a couple of inches tall to the spacing your guide gives. Crowded carrots stay thin. Weeds are a major competitor in the early weeks, since carrot seedlings grow slowly, so keep rows clear by hand or shallow cultivation.
Water thinned rows afterward, because disturbed roots can attract pests.
Mulch lightly between rows once seedlings are established to hold moisture and reduce weeding, keeping the mulch away from the crown.
What problems affect carrots?
Carrot rust fly, leaf diseases, cracking and green shoulders are common complaints. Row cover can keep adult flies from laying eggs, and hilling soil over shoulders prevents greening. Rotation helps reduce disease.
If a pesticide is ever considered, read the label, observe pre-harvest intervals, protect pollinators and check applicator licensing rules. Ask your extension office what is active in your area.
Store harvested carrots cool and humid, with tops removed. For canning or freezing, use only tested procedures from the National Center for Home Food Preservation or extension. Rotate carrots with unrelated crops, and avoid planting them where related crops such as parsnip or celery grew recently.
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.