Ammis in Harpsdale

Ammi majus

Ammi
Ammi · Ammi majus

A hardy annual grown in the UK for airy white flowers and good cutting stems. Sow in spring for a summer display in borders and cutting patches, or try an autumn sowing in mild areas for stronger plants.

90 cm · Full Sun · Moderate Water

Calibrated to Harpsdale · last frost ≈ 6 Jun

Sow April to May, plant out June to July, harvest August to September. Frost risk September to June.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
SowNoNoNoYesYesNoNoNoNoNoNoNo
Plant outNoNoNoNoNoYesYesNoNoNoNoNo
HarvestNoNoNoNoNoNoNoYesYesNoNoNo

Growing guide

Step-by-step instructions for growing Ammi

  1. 01

    Sow Seeds

    22 Apr to 23 May

    Sow seeds thinly around 22nd April - 23rd May, just under deep in prepared soil. Keep the surface evenly moist while the seedlings establish, and protect early sowings from birds and slugs.

  2. 02

    Thin Seedlings

    21 May to 4 Jun

    When seedlings are large enough to handle, thin them to apart so each plant has room to branch. Keep the strongest plants and remove the weaker ones cleanly around 21st May - 4th June.

  3. 03

    Plant Out

    20 Jun to 4 Jul

    Set young plants into their final position once they are sturdy, spacing them apart. Water in thoroughly straight after planting, then use fleece if a cold snap is forecast around 20th June - 4th July.

  4. 04

    Support Plants

    27 Jun to 27 Jun

    From 27th June, add light stakes or mesh if the plants start to lean. Ammi can flop in exposed spots after rain, so put support in early rather than waiting for stems to bend.

  5. 05

    Water and Feed

    11 Jul to 5 Sept

    From 11th July to 5th September, water during dry spells and give a light balanced liquid feed once at the start of flowering if the soil is poor. Avoid overfeeding, as soft growth makes stems weak and floppy.

  6. 06

    Cut Flowers

    26 Aug to 5 Sept

    Cut stems from 26th August as soon as the flower heads open and keep picking through 5th September. Regular cutting encourages more stems, and the flowers last best if you cut early in the day and put them straight into water.

Companion plants

Tap a plant to see why it works (or doesn't) with Ammi.

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.

Ammi guides by town

See how Ammi timing shifts in other towns with different frost dates.