How to Grow Dill
'Bouquet' from Seed
The acid-green highlighter of the cutting garden — 90cm stems topped with large flat umbels of vibrant lime-green florets that intensify every surrounding colour; equally valuable as a culinary herb (fresh leaves, edible flowers, flavourful seed heads), an architectural cut flower filler, and a hoverfly haven that supports natural aphid control throughout the entire garden
Dill 'Bouquet' occupies a specific and underappreciated niche in the garden: it is simultaneously a culinary herb, a cut flower filler, and a wildlife plant of exceptional value. Most gardeners know dill from the kitchen — the feathery, anise-scented leaves that go into pickles, potato salad, and gravlax; the dried seed heads that flavour bread, soup, and cucumber. What is less commonly understood is that the cutting garden version of dill, 'Bouquet' in particular, produces something distinctly architectural and beautiful before it becomes culinary: flat-topped umbels of acid-green florets on strong branching stems, each head 10–15cm across, in a vibrant lime-yellow that acts as a natural "highlighter" in the border — intensifying the colours of everything growing beside it.
The 'Bouquet' variety was selected specifically for its more compact, earlier-flowering habit and its significantly larger umbel size compared to standard culinary dill. At 90cm — more stable in a windy UK garden than the 120–150cm of common culinary types — it produces the structural, architectural acid-green umbelliferous form that florists and flower arrangers prize, on stems sturdy enough not to collapse in a summer storm. And as the season progresses and the acid-green florets mature into golden-bronze seed heads, 'Bouquet' provides a completely different textural contribution: dried, aromatic, warm-toned seed heads that work in late summer arrangements in a way that the fresh flowers cannot.
Quick Facts at a Glance
Plant Type
Hardy Annual H3 — sow direct from March; self-seeds freely
Flowers / Seed heads
Acid-green umbels; mature to golden-bronze seed heads
Height
90cm — more compact than standard culinary dill; sturdier in wind
Dual use
Culinary herb + architectural cut flower filler
Key benefit
Hoverfly haven — absolute favourite of beneficial predatory insects
Difficulty
1 out of 5 — direct sow and stand back
Understanding the Variety
Dill (Anethum graveolens) is a member of the carrot family native to the Mediterranean and southwest Asia, cultivated continuously for at least 5,000 years for its culinary and medicinal properties. 'Bouquet' is a specific cultivar selected for its compact growth (90cm versus 120–150cm in wild types), early flowering habit, and particularly large, flat-topped umbels. These selection criteria make 'Bouquet' significantly better suited to the UK garden than generic culinary dill — shorter stems are more wind-resistant, earlier flowering means longer harvest windows, and larger umbel size makes each stem more useful as a cut flower.
The Acid-Green Highlighter Effect
The specific colour of Dill 'Bouquet' flower heads — a vibrant, slightly warm lime-green, technically described as acid-green or chartreuse — has a specific optical effect on neighbouring flowers. Yellow-green sits at the boundary between warm and cool on the colour wheel, which means it interacts positively with both warm (red, orange, terracotta) and cool (purple, blue, violet) neighbouring colours, making both appear more saturated and vivid by contrast. In a border, dill functions like a natural colour amplifier: the purples beside it look more purple, the reds more red, the blues more blue. In a vase, it provides the same effect — one or two stems of dill in a mixed arrangement changes the visual character of every other flower in it.
Hoverfly Haven — The Organic Gardener's Secret Weapon
Dill is the single most attractive plant for hoverflies (Syrphidae) in the British garden. Hoverflies — those bee-mimicking flies often seen hovering motionlessly then darting sideways — are the larvae of aphid predators: a single hoverfly larva consumes hundreds of aphids during its development. Growing dill specifically to attract hoverflies is a well-established practice in organic kitchen gardening, where it acts as a biological pest controller for surrounding vegetables. The accessible, open umbel flowers provide exactly the nectar and pollen that adult hoverflies require, and the flies then lay eggs among aphid colonies throughout the garden. The RHS Plants for Pollinators designation recognises this broader ecological role.
Sowing & Growing On
Direct Sow Preferred — Dill Has a Taproot and Resents Transplanting
Like all members of the carrot family, dill develops a taproot early and performs significantly better when direct-sown into its final position. Transplanted dill often bolts (rushes to flower and set seed without developing properly) or produces weak, floppy growth. If an indoor start is needed, use deep individual root trainers and transplant young.
-
Direct sow outdoors from March onwards, 5mm deep, in full sun. Sow thinly in drills or broadcast thinly. Soil can be poor to moderately fertile — very rich soil produces lush growth that bolts early. Well-drained soil is preferred; dill in waterlogged conditions performs poorly. Germination in 7–14 days when soil is at least 10°C.
-
Make successional sowings every 3–4 weeks through to July for continuous harvest. Dill matures and then bolts (sets seed) fairly rapidly once it has reached peak flowering — typically 8–10 weeks from sowing. Making 3–4 successional sowings through the growing season maintains a continuous supply of fresh foliage and flowers rather than a single flush followed by a gap.
-
Thin to 20–30cm apart when seedlings have 3–4 true leaves. Crowded dill produces tall, floppy plants with small umbels. Adequate spacing produces shorter, sturdier plants with the large flat-topped umbels that make 'Bouquet' valuable as a cut flower.
-
Water during dry spells to prevent premature bolting. Dill that experiences drought stress will rush to set seed before reaching the ideal foliage and flower stage. Regular watering during dry periods — particularly in the 4–6 weeks before flowering — maintains quality and delays bolting. Once the umbels are developing, bolting is inevitable and desirable — the seed heads are the final harvest.
Harvest & Uses
Foliage Harvest — Leaves at Any Stage
Dill leaves (dill weed) can be harvested from the moment plants reach 15cm tall — simply snip the feathery fronds with scissors. For the most intense flavour, harvest before the flowers develop. Once the plant flowers, leaf production decreases and the flavour in remaining leaves intensifies and becomes slightly coarser. Fresh dill leaf is best used immediately; it loses much of its delicate flavour when dried. Freeze in ice cube trays of water for preserving.
Flower Head Harvest — For Cutting and Arranging
Cut flower heads when the central florets have fully opened but before the outer florets begin to fade — typically when the umbel is fully flat and the acid-green colour is at its most vivid. Vase life 5–7 days. Remove all leaves below the waterline. The acid-green colour fades to yellow-green and then gold over the days in the vase — the full progression from acid-green to warm gold is attractive at every stage and can be used at multiple points in an arrangement's lifecycle.
Seed Head Harvest — Golden Bronze Late Summer
Allow some stems to fully mature — the umbels dry from green to golden-yellow to warm bronze as the seeds ripen. Cut when the first seeds have turned brown. Hang upside down in paper bags to collect seeds as they fall. The dried seed heads themselves (without the seeds) provide beautiful structure in dried and late-season arrangements — warm, golden, aromatic, and architecturally distinctive. The seeds are the most intensely flavoured part of the plant for culinary use.
Culinary Uses
Fresh dill leaf: classic with smoked salmon, gravlax, potato salad, cucumber, yoghurt, and egg dishes. Dill flowers: edible, milder than the leaves, excellent sprinkled over potato salad or used as a garnish on chilled soups. Dill seeds: more intensely flavoured than the leaves; essential in pickles (particularly cucumber pickles and gherkins), rye bread, and Scandinavian cooking generally. The seeds store well for 2–3 years in a sealed container.
Self-Seeding — A Permanent Dill Colony
Dill self-seeds prolifically in most UK gardens. Allow a few stems to fully mature and drop their seeds in autumn, and a new generation of plants will appear in the same spot the following spring without any further intervention. Once established in a suitable position, dill tends to perpetuate itself indefinitely, requiring only thinning each spring. The self-sown plants often appear earlier and more vigorously than sowings from purchased seed.
Caterpillar Food Plant
Dill is a host plant for the caterpillars of several butterfly and moth species, including the Swallowtail butterfly (where present in the UK) and several hoverfly species whose larvae feed on aphids. In the broader ecological context, growing dill provides food web support beyond just adult pollinators — it supports the caterpillar stage of several beneficial and aesthetically valued species. The aromatic foliage also deters a range of common garden pests from surrounding plants.
Sowing & Harvest Calendar
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 🌱 Direct sow |
|
|
|
|
|
|||||||
| 🌼 Flower heads |
|
|
|
|
||||||||
| 🟡 Seed heads |
|
|
|
Common Problems & Solutions
| Problem | Likely Cause | What to Do |
|---|---|---|
| Bolting before reaching good size | Drought stress; transplant shock; hot weather | Water consistently during dry spells, particularly in the 4–6 weeks before flowering. Direct sow rather than transplanting — transplanted dill bolts far more readily than direct-sown plants. In very hot summers, partial shade through the hottest part of the day can delay bolting slightly. Successive sowings every 3–4 weeks ensure a continuous supply even when individual plants bolt early. |
| Floppy, lax stems | Overcrowding; over-rich soil; too much shade | Thin to 20–30cm apart — crowded dill produces weak, tall, floppy stems. Full sun is essential. Avoid planting in recently manured or heavily fertilised soil — the resulting lush, soft growth is less structurally stable. 'Bouquet' is significantly sturdier than standard culinary dill types, but adequate spacing and lean soil are still important. |
| Carrot fly damage to roots | Carrot fly larvae | Dill shares the carrot fly vulnerability common to all umbellifers. Avoid sowing in rows near cultivated carrots or parsnips, which attract carrot fly. Do not thin in warm afternoon weather when carrot fly is most active — the crushed foliage smell attracts the fly. Cover with fine insect mesh if carrot fly is a persistent problem in the area. |
| Self-seeding too aggressively | Ideal conditions; large seed production | Deadhead most flower heads before the seeds fully ripen if self-seeding is unwanted. Leave 2–3 heads per plant to ripen for a controlled self-seeding colony and seed harvest. Dill's self-seeding is generally moderate rather than problematic in a managed garden, and the resulting seedlings are easy to thin or relocate while young. |
Plant Specifications
The three-harvest plant — acid-green flower heads, golden seed heads, and aromatic leaves from a single March sowing
Direct sow in full sun from March. Sow again in April. And May. Make three or four successional sowings and have a continuous supply of feathery foliage, acid-green flower heads, and eventually warm golden seed heads from June through October. Let some stems self-seed. The hoverflies will find it within days of flowering. The kitchen will thank you for the seeds come pickle season.
Shop Dill 'Bouquet' Seeds →