How to Grow Dill

Dill (Anethum graveolens) is an aromatic herb prized for its feathery leaves (dill weed) and its distinctive seeds (dill seed), both of which are used extensively in pickling, Scandinavian cooking, and as a fresh herb with fish, potatoes, and vegetables. It's a tall, fast-growing annual that reaches 2–5 feet in height, producing umbrella-shaped yellow flower clusters that are ornamentally striking as well as culinary useful.

Dill is a cool-season herb that grows best in spring and fall, bolting in summer heat. Like cilantro, it has a taproot that resists transplanting, so direct sowing where it will grow is strongly recommended. Succession planting every 2–3 weeks through the cool season ensures a continuous supply of fresh dill weed. Allow at least one plant to self-sow — dill volunteers reliably and becomes self-sustaining in an established herb garden.

Growing Tips

Harvest dill weed in the morning after dew dries for the most aromatic leaves. Cut fronds from the top 4–6 inches of the plant, leaving at least 2/3 of the plant intact. Fresh dill is best used immediately — it loses most of its aroma within hours of cutting, which is why homegrown fresh dill is so superior to store-bought.
For pickling dill, harvest when plants are in full flower — the flowers and seed heads at this stage have the most intense dill flavor that survives heat processing. The timing coincides with cucumber harvest season, which is conveniently natural.
Stake tall dill plants (over 3 feet) in exposed beds where wind can topple them. Use a single bamboo cane per plant with a loose tie around the main stem at mid-height. Staking is optional in sheltered spots or when plants grow close together and support each other.
Never plant dill near fennel — the two cross-pollinate readily, producing seeds with muddy, unpleasant flavor from both. Keep them at opposite ends of the garden. Dill also reportedly deters aphids when planted near brassicas, though evidence for this is limited.
Harvest dill seeds when the seed heads turn brown and seeds begin to loosen but before they fall. Cut seed heads and hang in paper bags to finish drying. Fresh dill seed is far more aromatic than commercially dried seed — use within 1 year for best pickling results.

Companion Planting

Dill's flower umbels are among the most effective structures for attracting parasitic wasps and beneficial predatory insects. However, dill and fennel should be separated as they cross-pollinate, and dill near peppers may inhibit growth in some studies. The planner helps you assign dill to a dedicated herb zone where it can self-sow season after season.

FAQ

When should I plant dill?

Direct-sow dill in early spring 3–5 weeks before your last frost date, and succession-sow every 2–3 weeks through spring for a continuous supply. For a fall crop, sow 6–8 weeks before your first fall frost. In warm climates (Zones 7+), fall through early spring is the primary growing season as summer heat causes immediate bolting.

Can I grow dill in a container?

Yes — grow dill in a deep container (at least 12 inches) to accommodate its taproot. Use a well-draining potting mix and place in full sun. Choose compact varieties like 'Fernleaf' dill (18 inches) rather than standard tall varieties (3–5 feet) for container growing. Water consistently as containers dry out faster than garden beds.

Why does my dill keep bolting?

Bolting is triggered by heat above 75°F and long days. This is natural and cannot be fully prevented — dill is programmed to complete its life cycle quickly. To extend the leaf harvest: use slow-bolt varieties like 'Fernleaf', provide afternoon shade as temperatures warm, and succession-plant every 2–3 weeks so fresh plants are always ready as older ones bolt.

Can I use dill flowers?

Yes — dill flowers are edible and commonly used in pickling. The flowers and immature seed heads are used in dill pickles and have an intense dill flavor that survives heat processing. The flowers also attract beneficial predatory wasps and make beautiful cut flowers. Pollinators are strongly attracted to dill flowers, making it a valuable companion plant for the broader garden.

How do I dry and store dill?

For dill weed: bundle stems with a rubber band and hang upside down in a warm, dry, well-ventilated location for 1–2 weeks. Dried dill loses 50–70% of its aroma compared to fresh, but is far better than commercial dried dill. Alternatively, freeze fresh dill by spreading on a sheet pan, freezing solid, then transferring to a bag — frozen dill retains most of its aroma. Store dried dill in an airtight container away from heat and light for up to 1 year.