How to grow caraway
Family Apiaceae. Hardy to USDA hardiness zone 3a+ (U.S. Department of Agriculture). Full sun. Ready in 365 days (biennial, seed in year two).
Sun
Full sun
Spacing
6-8 in
Days to harvest
365 days (biennial, seed in year two)
Hardiness
Zone 3a+
What growers actually recorded
Loading zone 7b results…
When to plant caraway
- Direct sow: ~-2 weeks after last frost.
Companion plants for caraway
Plant with: Pea, Onion.
Avoid near: Fennel, Dill.
Common pests & problems
Rarely bothered; carrot rust fly on occasion since it shares the family.
Feeding & fertilizer
N-P-K ratio: Low N, higher P (3-6-6)
Organic options: Compost only in bed prep · Bone meal at sowing · Skip nitrogen top-dress
When to feed: Feed the bed, not the plant. Carrots/parsnips fork or hair-root with fresh manure.
Watch for: Forked roots = too much N or fresh manure; use only well-aged compost.
N = nitrogen (leaves), P = phosphorus (roots and flowers), K = potassium (fruit and disease resistance). How to read a fertilizer label →
Grower's tip
It's biennial: leaves the first year, seed heads the second. Mark the row so it isn't tilled under before it flowers.
When to plant caraway in your zone
Free month-by-month sowing and transplanting lists, built from frost dates for your USDA (United States Department of Agriculture) hardiness zone.
Soil & water for caraway
Soil & pH
6.0-7.0
Well-drained loam. A biennial that spends its first year as a low rosette and bolts to seed in year two.
Light compost application; caraway does not need heavy feeding.
Watering
1 in / week
Even moisture in year one while the rosette establishes; taper as seed heads mature in year two.
Water when soil dries at 2 in; reduce once seed heads begin browning to avoid mold.
Knowing when to harvest
- In its second year, seed heads turn brown and seeds begin to dry, usually mid-summer.
- Cut whole umbels into a paper bag before seeds shatter, since caraway drops seed readily once fully ripe.
- First-year roots can be harvested and eaten like a small parsnip if the plant is not being kept for seed.
Storing & keeping
Dry cut heads 1-2 weeks in a warm, airy spot, thresh, and store seed airtight in a cool, dark place for up to 3 years.
What to expect
Per plant: 0.5-1 oz of seed per second-year plant
Troubleshooting caraway
No seed produced in year one
Likely cause: Caraway is a true biennial and will not flower until its second season
What to do: Overwinter the rosette (mulch in cold zones) and expect seed the following summer, not the planting year.
Seed heads mold before fully dry
Likely cause: Humid weather combined with watering too close to harvest
What to do: Cut heads as soon as most seeds have browned and finish drying indoors rather than leaving them exposed to rain.
Varieties worth growing
Common caraway (species type)
Grown almost exclusively as the straight species; named cultivars are not common in seed catalogs.
Growing caraway in containers
5-gallon pot workable, but the two-year cycle means the pot is committed for two full seasons before any seed harvest.
Nutrition
Beta-carotene, vitamin K, luteolin (parsley). A nutrient bargain per square foot.
Common questions
Why hasn't my caraway flowered in its first summer?
Caraway is biennial and only flowers and sets seed in its second year; the first year is spent building a root and leaf rosette.
Where these numbers come from
- USDA Plant Hardiness Zone Map (2023 revision). Zone assignment and the 30-year normals behind every cold-hardiness figure.
- NOAA NCEI 1991-2020 Climate Normals. Frost dates, growing-season length, and the probability bands on both.
- Cornell, UMN, and UC Davis Cooperative Extension crop guides. Spacing, days to maturity, soil pH targets, and per-plant yield ranges.
- USDA FSIS / FDA Produce Safety guidance. Wash, cure, and cold-storage handling numbers.
Ranges are regional guidance, not a promise for your yard. Your own logged results always override the published range.