How to grow Dill in Australia
Dill is a fast annual herb with feathery, aniseed-scented leaves for fish, potatoes and salads, and seed heads for pickling. In most of Australia it grows best through the cooler months, as heat makes it run to seed quickly. Sow it where it is to grow, and sow a little every few weeks for a steady supply.
📖 Our full guide: How to Grow Dill in Australia: Sowing, Pots and Harvesting
At a glance
When to sow by region
| Region | When to sow | Regional note |
|---|---|---|
| South East Queensland | March to September | |
| Northern Rivers NSW | March to September | |
| Sydney & Coastal NSW | March to September | |
| Melbourne & Victoria | March to September | Sow from March to September. Dill prefers the cool season and bolts quickly in heat, so Melbourne's cool climate gives it a long season. |
| Adelaide & SA | March to September | |
| Perth & WA | March to September | |
| Tasmania | September to January | Sow Sep to Jan. Mild summers give a long leaf season before seeding. |
| Canberra & ACT | March to September | Dill sow Mar to Sep; cold-tolerant annual; self-seeds readily; avoid hot months; grow for foliage and seeds. |
| North Queensland | May to September | Dry season May to Sep. Dill bolts in tropical heat; sow in cooler months. |
| Darwin & Top End | May to September | Dry season May to Sep. Dill bolts in tropical heat; sow in cooler months. |
Not to be confused with: Fennel, which has similar feathery leaves but is a taller, longer-lived plant, and Florence fennel, grown for its swollen bulb.
Where to plant
Grow dill in a warm, sunny, sheltered spot with fertile, free-draining soil. It dislikes cold, soggy ground. The tall, hollow stems are easily flattened by strong wind, so a spot beside a fence or among taller plants helps. Gardening Australia notes that leafy annual herbs such as dill do well where they get morning sun, which also suits warmer areas, as afternoon heat speeds up bolting.
Dill has a taproot and does not like being moved, so sow it where it will grow.
- South East Queensland, the Northern Rivers, Sydney, Adelaide and Perth: sow from March to September. Summer sowings bolt within weeks.
- Melbourne and Canberra: sow from March to September. The cool climate gives a long leaf season; in Canberra it often self-seeds.
- Hobart: sow from September to January. Mild summers give a long leaf season before the plants seed.
- North Queensland and Darwin: sow in the dry season, May to September, as dill bolts quickly in tropical heat.
How to plant
- Weed the bed, fork it over and rake it to a fine surface.
- Sow seed thinly in shallow drills about 1 cm deep, in rows about 30 cm apart, and barely cover it.
- Keep the soil moist until seedlings appear, usually in one to two weeks. In cool weather, water deeply at sowing and then lightly each day until they emerge.
- Thin seedlings to about 20 to 25 cm apart.
- Sow a short row every three to four weeks for a constant supply of young leaves.
- If you raise seedlings in punnets, plant them out young, within about four weeks of sowing, before the taproot gets long.
Watering and feeding
Keep the soil evenly moist, and water more in dry, warm spells. Dill that dries out bolts early and stops making leaves. Potted dill dries out quickly, so check it often.
Dill needs little feeding. A light liquid feed every few weeks is plenty. Rich soil and heavy feeding give soft, floppy growth.
Pruning and care through the year
- Pick leaves regularly, which keeps the plant bushy and delays flowering.
- Stake tall plants or tie them loosely to a cane in windy spots.
- Let a few plants flower. The flat yellow umbels draw bees, hoverflies and tiny parasitic wasps, which help control aphids and caterpillars in the vegetable garden.
- Dill self-seeds readily if seed heads are left to drop. Pull unwanted seedlings while small.
- Dill and fennel are close relatives. Keep them apart if you save seed, as they can cross when they flower together.
Harvesting
Start picking leaves about six to eight weeks after sowing, once plants are leafy and about 30 to 40 cm tall. Snip from the top and outside, and always leave at least a third of the plant. The leaves wilt quickly once cut, so use them fresh.
For seed, let the flower heads ripen until the seeds turn brown. Cut the whole stem, put the head in a paper bag and hang it upside down until the seeds dry and drop. Store dry seed in an airtight jar for pickling and cooking.
Growing in pots
Dill grows well in a pot at least 25 cm deep, which gives the taproot room. Sow directly into the pot in a quality potting mix, keep it in a sunny, sheltered spot, and water often, as pots dry out fast and dry dill bolts.
Companion planting
Flowering dill is one of the best plants for bringing helpful insects into a vegetable garden. Keep it apart from its close relatives.
Good companions
- Cabbage Dill flowers bring in hoverflies and parasitic wasps that prey on aphids and caterpillars on the cabbage family.
- Onion A low, upright crop that grows in the same cool season and does not shade the dill. The pairing is traditional rather than proven.
- Corn Tall corn gives some shelter from wind for dill's hollow stems, and dill flowers bring in beneficial insects.
Keep apart
Avoid planting these close to dill.
Pests and diseases
Dill has few problems in cool weather. Pests build up in spring and early summer.
Pests to watch for
- Aphids Clusters of small green or black insects on the soft stems and young leaves, which curl. Hose them off or squash them, and let beneficial insects build up.
- Slugs Seedlings eaten off at ground level, with slime trails, mostly after rain.
- Caterpillars Leaves stripped by green caterpillars. Pick them off by hand.
Diseases to watch for
- Powdery mildew White powdery patches on the leaves, mostly as plants age and in warm, dry weather. Keep plants watered and pick affected leaves.
Common questions
Why does my dill keep going to seed?
Dill bolts in heat and when it dries out. Sow it in the cooler months, keep the soil moist, pick leaves often, give it morning sun rather than hot afternoon sun, and sow a fresh row every three to four weeks so there is always young dill coming on.
When should I plant dill in Australia?
From March to September in most regions, from September to January in Hobart, and in the dry season (May to September) in the tropics. Summer sowings in warm areas bolt within weeks.
Can I transplant dill?
It is best sown direct, as it has a taproot that dislikes disturbance. If you raise it in punnets, plant the seedlings out young, within about four weeks of sowing.
How do I harvest dill seed?
Let the flower heads ripen until the seeds turn brown. Cut the stems, put the heads in a paper bag and hang them upside down until the seeds dry and drop, then store them in an airtight jar.
Can I grow dill in a pot?
Yes. Use a pot at least 25 cm deep with quality potting mix, sow directly into it, and water often, as dry dill bolts quickly.
Can you plant dill and fennel together?
It is best not to. They are close relatives and can cross when both flower, which spoils saved seed.
Sources we checked: Gardening Australia: Dill (plant finder); Gardening Australia: Cool season herbs; Gardening Australia: Winter herbs; RHS: Dill, grow your own.
