Mammoth
A tall, leafy dill with good flavour for salads, fish and pickling.
When to plant Dill in Sheffield
Anethum graveolens
A quick annual herb for light, feathery leaves. It grows best from spring to mid-summer in a sunny, sheltered spot with free-draining soil. It dislikes root disturbance.
80 cm · Full Sun · Moderate Water
Calibrated to Sheffield · average last frost around 23 Apr
| Activity | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow outdoors | No | No | No | Yes | Yes | Yes | Yes | Yes | No | No | No | No |
| Harvest | No | No | No | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No |
Growing guide
What to do through the growing season
01
Sow seeds
2 Apr to 10 Aug Optional · repeat every 3 weeksSow thinly around 2nd April - 10th August, cover . Sow a fresh batch every 21 days.
- Slugs go for seedlings. Hand-pick or use a barrier.
- Fleece helps the first sowing if the soil is still cold. Take it off once seedlings are growing.
02
Thin seedlings
12 Apr to 31 Aug Dates as each sowing reaches this stageAfter each sowing, thin to . Snip extras at soil level. Do not transplant.
03
Water in dry spells
2 Apr to 8 Nov Dates as each sowing reaches this stageAfter each sowing, water in dry spells from 2nd April through 8th November. Dry spells can encourage bolting.
04
Pinch out tips
30 Apr to 8 Nov Dates as each sowing reaches this stageAfter each sowing, pinch tips from 30th April if you want leaves. Take flower stems as they appear.
05
Harvest leaves
14 May to 8 Nov Dates as each sowing reaches this stageAfter each sowing, start cutting from 14th May. Leave about one-third of the plant. Keep picking through 8th November.
- Leave one plant to flower if you want seed heads.
Companion plants
Tap a plant to see why it works (or doesn't) with Dill.
Good companions
Plants to avoid
Why companion planting matters
Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.
Suggested varieties
Popular varieties of Dill to consider
Fernleaf
A compact, slow-bolting type that suits pots and small gardens.
Tetra
A reliable, later-flowering cultivar with plenty of foliage.
Related plants
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Sweetcorn
Sow indoors March to April, plant out May, harvest July to August. Typical frost risk November to April.
Dill guides by town
See how Dill timing shifts in other towns with different frost dates.