Herb · Apiaceae
Caraway
Carum carvi
Hand it full sun and a patient first year, and caraway rewards you with fragrant seed the next.
Full sun
Every 3–7 days
50–77°F · 10–25°C
70–90 days
Overview
Caraway is a tough biennial herb out of the carrot family, grown for warm, faintly anise-flavored seed that turns up in rye bread, cheese, and slow-cooked dishes. It runs on a two-year cycle: a low rosette of feathery leaves goes up the first season, then the flowers and seed wait for the second. The thick, parsnip-like taproot explains why this plant hates getting moved once it has dug in.
Don't let the nickname Persian cumin fool you, because this is its own plant, Carum carvi, carrying a flavor all its own. It grows readily in cool temperate gardens across USDA zones 4 to 9, asking only for full sun, steady moisture while the slow seed wakes up, and the patience to ride out that first leafy year.
Care
The short version: give it full sun, fertile well-drained soil leaning neutral, and even moisture while the slow seed germinates, then wait out a leafy first year before the seed crop rolls in during year two.
Light
Caraway craves full sun to ripen a worthwhile seed crop, though it will scrape by in partial sun. The more direct light it soaks up, the sturdier the flowering stems and the fuller the year-two harvest.
Water
Keep the soil evenly moist and well drained, never sitting wet. The seedbed especially has to stay damp through that slow germination, since an early dry spell is the fastest way to lose your stand. Water every 3 to 7 days once the plants are up, dialing it to the heat and rain.
Soil
Set caraway into fertile, well-drained loam packed with organic matter. It favors ground close to neutral, around pH 6.0 to 7.5, and a deep, loose bed lets that long taproot drive straight down.
Temperature
This cool-temperate herb feels right between roughly 50°F and 77°F (10°C to 25°C). It shrugs off the cold of zones 4 to 9, riding out winter as a rosette before blooming the next year.
Humidity
Average outdoor humidity of 40% to 60% suits caraway just fine, so skip fretting over the number. Good airflow around the plants counts for far more than any reading on a gauge.
Feeding
Caraway is a light feeder, so a balanced fertilizer or a scoop of compost in spring during active growth does the job. Hold back on nitrogen, which pushes soft leafy growth and shortchanges the seed you actually want.
Pruning
Not much calls for your attention here. Snip off the spent flower and seed heads after harvest, deadhead if you'd rather rein in self-seeding, and keep clear of the central taproot crown as you work.
Repotting
Caraway hardly ever needs repotting and resents root disturbance, so direct-sow it where it's meant to grow instead of transplanting. If a container is your route, pick a deep one and never break up that taproot.
Size & spacing
Plants climb to 12 to 30 inches (30 to 75 cm) once the flowering stems shoot up in year two. Hand each one about 10 to 12 inches (25 to 30 cm) of elbow room so air flows freely and the rosettes stay uncrowded.
When to plant
Caraway keeps a two-year clock, so settle in for the long game. Direct sow in spring the moment the soil can be worked, or jump ahead with an early fall sowing. The plant roots in and grows leaves the first year, blooms in late spring of the second, then ripens its seed by mid to late summer.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Direct sow in spring as soon as soil can be worked, or in early fall.
- Harvest: Blooms late spring to early summer of the second year; harvest seeds when they turn brown in mid to late summer of year two.
Hardiness
USDA hardiness zones: 4–9
Temperature: down to -34°C
Troubleshooting
Caraway is a relaxed herb, and most of its trouble surfaces either underground at the taproot or as patchy, foot-dragging germination right at the start. Match what you spot below and act early, while stepping in still changes the outcome.
Plants stall while rusty tunnels riddle the taproot
Blame carrot root fly, whose larvae chew into the root and drag down the entire plant. Dig one up and rust-colored tunnels wind through the flesh alongside small white maggots. Yank and bin every infested plant, throw row cover over the survivors right from sowing, and shift your Apiaceae crops to a fresh bed each season so the flies lose the trail.
Fix:
- Remove and destroy infested plants
- Use floating row covers from sowing
- Rotate Apiaceae crops to a new bed each year
Sparse seedlings creep up after sowing
Caraway takes its time to sprout, so a thin, gappy stand usually points to a seedbed that dried out before the seed could break ground, or seed that was simply too old. Even in warm soil, two to three weeks on you might count only a scattering of seedlings. Keep that bed evenly moist until they emerge, break up any surface crust, and sow fresh seed shallow to fill the gaps if the first run disappoints.
Fix:
- Keep the seedbed consistently moist until germination
- Resow with fresh seed at a shallow depth
- Avoid letting the surface crust over
Green caterpillars chew the leaves to ribbons
Those plump green caterpillars striped with black and yellow are parsley worms, the larvae of the black swallowtail. On a settled plant the chewing looks scarier than it really is. Pick them off by hand and shift them onto a sacrificial plant instead of squashing them, because they grow up into pollinators that earn their keep in the garden.
Fix:
- Handpick the caterpillars
- Relocate them to a sacrificial plant since they mature into pollinators
- Tolerate minor damage on established plants
Toxicity
The ripe seed is a much-loved kitchen spice, so caraway sits safely on your own plate. The plant itself tells a different story for animals: ASPCA lists it as toxic to dogs, cats, and horses, since its carvone and limonene oils can spark mild vomiting and diarrhea. Keep the aromatic foliage and harvested seed well clear of curious pets.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Mild
A nosy cat that samples the fragrant leaves may start drooling and then lose its meal, with loose stools trailing after. The signs stay mild and tend to clear up without help.
Dogs Mild
Dogs lured in by the scent often end up with a queasy stomach after gnawing the leaves or seed, and vomiting plus diarrhea are the usual outcome.
Horses Toxic
Those same carvone and limonene oils irritate a horse's gut, so a grazing horse can drool, turn colicky, and pass loose droppings.
Rabbits Caution
Strong essential oils upset a rabbit's digestion quickly, so leave the aromatic leaves off the menu instead of handing them over as forage.
Livestock Caution
Grazing animals seldom go looking for the pungent foliage, yet a big mouthful could trigger the same mild stomach upset other animals get.
Birds Caution
Concentrated plant oils hit birds hard, so steer pet birds clear of the foliage and above all the oil-rich seed.
People Edible seeds safe
The ripe seed is a kitchen spice that flavors bread, cheese, and stews without any fuss. Enjoy it as food rather than dosing on the concentrated oil, and you've nothing to worry about.
Aromatic foliage and seeds may tempt pets, so keep harvested seed and plants out of reach.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
United Kingdom
Animal PoisonLine: 01202 509000 (fee applies)
Australia
Animal Poisons Helpline: 1300 869 738
Varieties
Most caraway is the standard biennial, but a couple of named types are worth knowing if you want seed sooner or a fatter harvest.
Annual caraway (var. annua, e.g. 'Sprinter')
Flowers and sets seed in its very first season, sparing you the usual wait until the second year.
'Arterner'
A German biennial selection prized for a heavy yield of seed and essential oil.
Companions
Plant near
Peas: Traditional interplanting companion; its deep taproot helps loosen and break up soil for neighboring plants.
How to propagate
Caraway grows from seed, and there's really one good way to handle it, thanks to that long taproot that won't put up with a move.
SeedEasy
Direct sow in early spring once soil is workable, or in early fall · Germinates in 1-3 weeks; forms a leafy rosette the first season and produces seed in the second season
Sow caraway right where it will live, because that long taproot won't forgive being lifted and moved. Scatter seed in early spring once the soil works easily, or sneak in a fall sowing, and watch for sprouts within one to three weeks. The plant raises a leafy rosette its first season and holds back its flowers and seed for the second.
Myths
Caraway and cumin are the same spice.
Blame the nickname Persian cumin for the confusion, because caraway stands as its own species, Carum carvi, while true cumin is Cuminum cyminum. The two carry differently shaped seeds and separate flavors, so swapping one for the other simply won't fly.
Caraway is completely harmless to pets.
ASPCA flags caraway as toxic to dogs, cats, and horses. Its carvone and limonene oils can spark mild vomiting and diarrhea, so park the plant and the harvested seed well beyond a pet's reach.