When to plant Ammi in London

Ammi majus

Ammi
Ammi · Ammi majus

A hardy annual grown in the UK for airy white flowers and good cutting stems. Sow direct. The sap can irritate skin in sun. Wear gloves.

90 cm · Full Sun · Moderate Water

Add to garden

Calibrated to London · last frost ≈ 4 Apr

Sow outdoors September to October, harvest June to December. Frost risk November to April.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Sow outdoorsNoNoNoNoNoNoNoNoYesYesNoNo
HarvestNoNoNoNoNoYesYesYesYesYesYesYes

Growing guide

What to do through the growing season

Growing guide for

Change the guide to see different planting timelines and tips.

Sow once in free-draining soil for sturdier plants and flowers next year. Protect young growth if hard frost is forecast.

  1. 01

    Sow Seeds

    15 Sept to 20 Oct

    Sow thinly during 15th September - 20th October in weed-free, free-draining soil. Cover seed by no more than . Keep the surface lightly moist while seedlings establish. This is one sowing, not a run of batches.

    • The sap can irritate skin in sun. Wear gloves.

  2. 02

    Thin Seedlings

    29 Sept to 17 Nov Dates as each sowing reaches this stage

    Thin during 29th September - 17th November, keeping the strongest plants and leaving between them. Remove surplus seedlings cleanly so the remaining roots are not disturbed.

  3. 03

    Protect Young Plants

    29 Sept to 29 Dec Dates as each sowing reaches this stage

    From 29th September to 29th December, keep weeds away from the seedlings. Cover with fleece if hard frost is forecast. Take it off in mild weather.

  4. 04

    Support Plants

    13 Apr to 1 Jun 2027 Dates as each sowing reaches this stage

    Put light stakes or mesh in during 13th April - 1st June 2027, next season, before the stems begin to lean. Support exposed plants early.

  5. 05

    Water and Feed

    13 Apr to 14 Nov 2027 Dates as each sowing reaches this stage

    From 13th April 2027 to 14th November 2027, water during dry spells. If the soil is poor, give one light balanced feed as flowering begins. Avoid rich feeding.

  6. 06

    Cut Flowers

    2 Jun to 4 Dec 2027 Dates as each sowing reaches this stage

    Flowers open next year. Cut stems from 2nd June 2027 to 4th December 2027 as the flower heads open. Pick early in the day, put stems straight into water, and keep cutting.

Suggested varieties

Popular varieties of Ammi to consider

Graceland

A reliable Ammi majus with large, white, lace-like umbels on tall, sturdy stems. It is vigorous and copes well with UK's cool summers, making it a top choice for cutting and borders.

Casablanca

A compact, early-flowering Ammi majus that stays shorter than most, so it suits smaller gardens and windy spots. The clean white flowers appear for weeks and are excellent for picking.

Green Mist

This Ammi visnaga variety produces soft green umbels that add a frothy, airy texture to beds and bouquets. It is tough, self-seeds readily, and handles damp British summers without flopping.

Snowflake

A fine-textured Ammi majus with delicate foliage and abundant white blooms. It is slightly more compact and bushy than 'Graceland', making it a good middle-of-border filler that stands up well to rain.

Ammi guides by town

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