Herb · Apiaceae
Caraway
Carum carvi
Sited in full sun across its two-year cycle, caraway spends year one on leaf and root and sets fragrant seed in year two.
Full sun
Every 3–7 days
50–77°F · 10–25°C
70–90 days
Overview
Caraway is a cold-hardy biennial in the carrot family, raised for the warm, gently anise-scented seed that flavors rye bread, cheese, and long-simmered dishes. It runs on a strict two-year cycle: a low rosette of feathery foliage builds reserves in the first season, and only in the second does the plant throw up flowering stems and set seed. The root is a thick, parsnip-like taproot, which is precisely why caraway will not tolerate being lifted and moved once established.
The Persian cumin nickname misleads; this is a separate species, Carum carvi, with a flavor entirely its own. It grows easily across cool temperate gardens in USDA zones 4 to 9, asking only for full sun, steady moisture while the slow seed works its way up, and the patience to let that first leafy year run its course.
Care
The short version: site it in full sun on fertile, free-draining soil held near neutral, keep moisture even while the slow seed germinates, then wait out a leafy first year before the seed crop ripens in the second.
Light
Caraway needs full sun to ripen a worthwhile seed crop, though it will tolerate partial sun. More direct light drives stronger flowering stems in the second year, and stronger stems carry a fuller seed set.
Water
Hold the soil evenly moist and well drained, never saturated. The seedbed especially must stay damp right through the slow germination, since a dry spell at that stage is the surest way to lose the stand before it forms. Once plants are up, water every 3 to 7 days, dialing it up or down for heat and rainfall.
Soil
Set caraway into fertile, well-drained loam worked through with organic matter. It performs near neutral, within pH 6.0 to 7.5, and a deep, loose bed lets the long taproot drive straight down rather than fork.
Temperature
A cool-temperate herb, caraway sits comfortably between roughly 50°F and 77°F (10°C to 25°C). It takes the winters of zones 4 to 9 in stride, overwintering as a rosette before flowering the following season.
Humidity
Ordinary outdoor humidity of 40% to 60% suits it well, so this is not a figure to manage. Good air movement around the plants counts for more than any reading on a gauge.
Feeding
Caraway is a light feeder, so a balanced fertilizer or a dressing of compost in spring during active growth covers its needs. Keep nitrogen modest, since an excess drives soft leafy growth at the expense of the seed you are growing for.
Pruning
Very little is called for. Clear the spent flower and seed heads once you have harvested, deadhead if you want to rein in self-seeding, and work carefully around the central taproot crown so you do not disturb it.
Repotting
Caraway seldom needs repotting and resents root disturbance, so sow it directly where it is to grow rather than moving transplants. If you must use a container, pick a deep one and leave the taproot intact.
Size & spacing
Plants reach 12 to 30 inches (30 to 75 cm) once the flowering stems rise in the second year. Allow roughly 10 to 12 inches (25 to 30 cm) between them so air circulates freely and the rosettes are not left crowding one another.
When to plant
Caraway runs on a two-year clock, so commit to the long game from the outset. Direct sow in spring the moment the soil can be worked, or steal a head start in early fall. The plant establishes and builds foliage through the first year, flowers in late spring of the second, and 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 gives little trouble, and what does arise tends to sit at one of two pressure points: the taproot below ground, or thin and tardy germination at the very start. Match the symptoms below to what you see and act early, while a response still changes the outcome.
Taproot riddled with rusty tunnels and the plant stalls
Larvae of the carrot root fly mine straight into the storage root, severing the tissue the plant relies on for water and reserves, so growth above ground grinds to a halt. Lift a suspect plant and the diagnosis is plain: winding rust-colored galleries and small white maggots. Destroy any infested plants, screen the survivors under row cover set in place from sowing onward, and shift your Apiaceae beds annually so egg-laying females lose the scent trail.
Fix:
- Remove and destroy infested plants
- Use floating row covers from sowing
- Rotate Apiaceae crops to a new bed each year
Sparse, sluggish emergence after sowing
Caraway is naturally slow off the mark, so a thin, gappy stand almost always traces back to a seedbed that dried out before the embryo could break dormancy, or to spent seed with little viability left. Two to three weeks along you may count only a scattering of seedlings even where the soil is warm. Hold even moisture across the bed until emergence, break up any surface crust that blocks the shoots, and resow shallow with fresh seed if the first attempt thins out.
Fix:
- Keep the seedbed consistently moist until germination
- Resow with fresh seed at a shallow depth
- Avoid letting the surface crust over
Foliage chewed and stripped by green caterpillars
Those fat green caterpillars ringed with black and yellow are parsley worms, the larval stage of the black swallowtail. On a settled plant with reserves to spare, the leaf loss reads far worse than it actually costs. Rather than killing them, lift each one onto a sacrificial host plant, since they pupate into the swallowtail butterflies that pollinate 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 long-trusted kitchen spice, so caraway is safe on your own plate. For animals the picture differs: ASPCA classes the plant as toxic to dogs, cats, and horses, because its carvone and limonene oils can bring on mild vomiting and diarrhea. Keep the scented foliage and any harvested seed clear of curious pets.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Mild
A cat that samples the scented leaves out of curiosity tends to drool, then vomit, with loose stools trailing behind. The reaction stays mild and generally resolves without intervention.
Dogs Mild
A dog lured in by the aroma typically ends up with a queasy stomach after working on the leaves or seed, vomiting and diarrhea being the usual outcome.
Horses Toxic
Carvone and limonene irritate the equine digestive tract, so a horse that grazes the plant can show drooling, colicky discomfort, and loose droppings.
Rabbits Caution
Strong essential oils readily upset a rabbit's delicate gut flora, so the aromatic leaves are better withheld than offered as forage.
Livestock Caution
Grazing stock seldom choose the pungent foliage on their own, yet a heavy mouthful could trigger the same mild digestive upset seen in other animals.
Birds Caution
Concentrated plant oils sit poorly with birds, so pet birds should be kept clear of the foliage and above all the oil-dense seed.
People Edible seeds safe
The ripe seed is a culinary spice folded into bread, cheese, and stews without issue. Treat it as food rather than dosing on the concentrated oil and it poses no concern.
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
The bulk of caraway in cultivation is the standard biennial, but two named forms are worth knowing if you want seed sooner or a heavier yield.
Annual caraway (var. annua, e.g. 'Sprinter')
This form completes flowering and seed set in a single season, sparing you the wait into a second year.
'Arterner'
A German biennial line selected for heavy seed yield and a high essential oil content.
Companions
Plant near
Peas: Traditional interplanting companion; its deep taproot helps loosen and break up soil for neighboring plants.
How to propagate
Caraway is raised from seed, and there is really only one sound method, dictated by that long taproot that refuses to be moved.
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 directly into its final position, because the long taproot will not forgive transplanting. Drill the seed in early spring once the soil is workable, or in early fall, and expect emergence in one to three weeks. Through its first season the plant puts its energy into a leafy rosette, holding back flowers and seed for the second.
Myths
Caraway and cumin are the same spice.
The Persian cumin nickname is what seeds the confusion, yet caraway stands as its own species, Carum carvi, where true cumin is Cuminum cyminum. Their seeds differ in shape and the flavors are distinct, which is why one cannot substitute for the other.
Caraway is completely harmless to pets.
ASPCA records caraway as toxic to dogs, cats, and horses. The carvone and limonene oils it carries can provoke mild vomiting and diarrhea, so keep both the plant and any harvested seed beyond a pet's reach.