Mustard Greens in Mumbles

Brassica juncea

Mustard Greens
Mustard Greens · Brassica juncea

A fast-growing leafy brassica for cool and mild weather. Sow in succession from spring through late summer for a steady supply of pungent young leaves, and keep it well watered in dry spells to slow bolting.

30 cm · Full Sun · Moderate Water

Add to garden

Calibrated to Mumbles · last frost ≈ 28 Mar

Sow March to August, harvest July to December. Frost risk November to March.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
SowNoNoYesYesYesYesYesYesNoNoNoNo
HarvestNoNoNoNoNoNoYesYesYesYesYesYes

Growing guide

Step-by-step instructions for growing Mustard Greens

  1. 01

    Sow Small Batches

    7 Mar to 28 Aug every 3 weeks

    Sow small batches around 7th March - 28th August, setting seed about deep in prepared soil or compost. Sow a fresh batch every 21 days for a steady supply of young leaves rather than one glut.

  2. 02

    Thin Seedlings

    12 Jun to 23 Jun

    When seedlings are large enough to handle from 12th June, thin them to their final spacing so they do not crowd each other. Keep the strongest plants and snip extras at soil level to avoid disturbing the roots.

  3. 03

    Protect From Slugs

    9 Jun to 17 Jul every week

    From 9th June, check plants often and protect them from slugs and snails, which can strip young leaves overnight. Use pellets only if needed and follow the label, or add barriers and hand-pick after rain.

  4. 04

    Water Regularly

    16 Jun to 28 Dec every week

    From 16th June until 28th December, keep the soil evenly moist, especially in warm spells and under cover. Water at the base of the plants so growth stays steady and the leaves stay tender.

  5. 05

    Harvest Leaves

    2 Jul to 28 Dec every week

    Start picking from 2nd July once plants are well developed. Cut outer leaves little and often for a cut-and-come-again crop, or lift whole plants if you want them young and mild.

Companion plants

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

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 Mustard Greens to consider

Green in the Snow

A reliable, hardy variety for cool-weather sowings with good flavour and steady leaf production.

Red Giant

Large purple-tinged leaves with a stronger flavour and fast growth in cool conditions.

Komatsuna

A fast, mild-leaved type that can be picked young for repeated harvests.

Mustard Greens guides by town

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