Grow caraway for its fragrant leaves in the first year and its familiar seeds in the second. Caraway ( Carum carvi ) is a cool-season biennial: it builds a low rosette of foliage during its first growing season, then sends up flowering stems and produces seed before completing its life cycle. Because the plant forms a long taproot, sowing seeds directly where the plants will grow is usually the simplest approach.
How to grow caraway from seed
Plant caraway in spring as soon as the soil can be worked. In areas with mild winters, sowing in late summer or early fall can also give plants time to establish before cold weather. Caraway seed planting works best in a permanent garden bed, since seedlings can be difficult to transplant without disturbing their roots.
Prepare the bed by loosening the soil and removing weeds. Sow seeds about ¼ inch deep in rows, then water gently. Keep the soil evenly moist while the seeds germinate, which commonly takes one to three weeks depending on soil temperature and conditions. Once seedlings are established, thin them so they have room to mature.
A practical caraway plant spacing is about 8 to 12 inches between plants, with roughly 12 to 18 inches between rows. Follow the spacing on your seed packet if it differs, since varieties and growing conditions can vary. Crowded plants may compete for light and moisture, and adequate spacing makes it easier to weed and inspect the bed.
Caraway sunlight and soil
Caraway grows best in full sun, meaning a spot that receives about six or more hours of direct sunlight a day. In regions with hot summers, some afternoon shade may help plants cope with heat, though too much shade can weaken growth and reduce flowering.
Choose well-drained soil. Caraway tolerates a range of ordinary garden soils, but it performs poorly where water stands around the roots. If your soil is heavy clay, improve drainage by working in organic matter or use a raised bed. A moderately fertile bed is usually sufficient; excessive fertilizer can encourage leafy growth at the expense of sturdy stems and seed production.
Water young plants regularly so they establish deep roots. Later, water when the soil begins to dry, especially during prolonged dry weather. Caraway is not a wet-soil plant, so avoid frequent watering that leaves the bed continually saturated. A light layer of mulch can help conserve moisture and suppress weeds, but keep it from pressing against the plant’s crown.
Caring for a caraway biennial
The biennial life cycle explains why caraway may not produce seeds in its first year. During that season, the plant forms a cluster of finely divided leaves close to the ground. It may remain green through a mild winter or die back temporarily in colder weather, then resume growth when conditions improve.
Keep weeds under control, particularly while seedlings are small. Once the plants have filled out, their foliage helps shade the soil, but weeds can still compete for water and nutrients. A modest compost dressing can support growth in poor soil; routine heavy feeding is unnecessary.
Caraway can reseed if mature seeds fall into the bed. If you want new plants in a different location, collect seed before it drops. If you prefer a tidy garden, remove unwanted seedlings while they are small. Leave selected plants in place through winter if you want to harvest seeds the following season.
Harvesting leaves and seeds
You can pick a few young leaves during the first year once the plants have enough foliage to recover from cutting. Use the leaves sparingly at first; their flavor is delicate, with a mild, aromatic character. Avoid stripping a young plant, since it needs its leaves to build the roots and energy reserves required for the next year’s growth.
In the second growing season, caraway produces upright stems topped with clusters of small flowers. This stage is known as caraway flowering. The flowers attract pollinating insects, and after pollination they develop into the ribbed fruits commonly called caraway seeds.
To harvest caraway seeds, watch the seed heads as they mature. The clusters gradually change from green to brown, and the seeds darken as they ripen. Cut the heads when most seeds are brown but before they begin falling. Place the stems in a paper bag or hang them upside down over a clean cloth in a dry, airy spot. Once fully dry, rub or shake the heads to release the seeds, then remove bits of stem and store the seeds in an airtight container away from heat and light.
If you wait too long, ripe seeds may scatter on the ground. Harvesting slightly before every seed head is completely dry helps limit losses; the cut stems can finish drying indoors. Save only fully dry seeds for storage, since moisture can cause them to deteriorate.
Common growing problems
Poor germination often results from dried-out soil during the germination period or seeds sown too deeply. Keep the seedbed lightly moist and cover seeds only shallowly. If seedlings emerge unevenly, allow the remaining seeds time to sprout before deciding that the sowing has failed.
Plants that produce leaves but few seeds may still be in their first year, or they may be growing in too much shade. Since caraway is a biennial, patience is part of the harvest. Give plants a sunny site, adequate room, and well-drained soil, then allow them to complete their second season.
