What can I sow in June in Scotland?

Basil, Leeks, Kale, Carrots, Beetroot, Courgettes, French Beans, Peas and more. These follow RHS UK timing — in much of Scotland lean to the later end of each window, and later still in the north and at altitude. Check your local last frost with the Frost Date Calculator.

Is it frost-free in June in Scotland?

Frost-free across virtually the whole country now. The safe window to plant out the last tender crops even at altitude. Frost varies sharply over short distances, so treat these as regional averages, not garden predictions.

June in the Scottish Garden

☀️ Summer📅 RHS timing, Scotland-adjusted🌡️ Met Office frost bands

Peak growing: plant out with confidence and keep sowing for autumn.

The month ahead

June is the month Scottish gardens finally feel reliable. Frost is behind all but the highest ground, the daylight is at its longest, and growth is fast enough to notice day by day. It is the month to plant out every remaining tender crop with confidence, but it is also the month the blight watch begins. Warm, humid spells are the trigger ; after a muggy, wet day, check your potatoes and outdoor tomatoes.

Pinch out tomato side-shoots and tie cordon plants to their supports.

A tall cordon tomato plant tied to a cane, with a hand pinching out a side-shoot lower down the stem — Tie the cordon in as it grows, and pinch out every side-shoot before it takes hold.

Ventilate greenhouses and polytunnels on every warm day ; still, humid air is exactly what blight, mildew and grey mould want. Start sowing autumn and winter brassicas: kale, broccoli and spring cabbage. It feels early, but they need a long growing season and a June start gives them it.

What to do in June

Sow indoors

Under cover: windowsill, heated propagator or greenhouse.

Basil

Sow outdoors

Direct into prepared ground (or under a cloche/fleece where noted).

Plant out

Move transplants, sets, tubers or cloves into their final spot.

Harvest

Ready to pick or lift this month (windows are approximate).

Fruit

Harvest early potatoes, strawberries, peas and broad beans. Pick strawberries as they ripen ; leaving overripe fruit on the plant invites grey mould. Check gooseberries and currants for sawfly larvae and pick them off by hand. Keep ponds topped up and leave a ramp or a log for wildlife to climb out.

Under cover

Ventilation is everything this month. A polytunnel that is not opened on a warm day becomes a disease incubator. Open doors and vents in the morning and close them in the evening if nights are still cool. Water the soil, not the leaves, and water in the morning so the foliage is dry by evening.

Key jobs in June

Plant out all remaining tender crops: outdoor tomatoes, beans, basil.
Keep succession-sowing salad, beetroot, carrots and peas for autumn supply.
Water consistently and deeply and mulch to hold moisture during dry spells.
Pinch out tomato side-shoots and tie cordon plants to their supports.
Ventilate greenhouses and polytunnels on warm days to keep mildew and mould down.
Watch potatoes and outdoor tomatoes for blight after warm, muggy spells.
Harvest early potatoes, strawberries, peas and broad beans.
Start sowing autumn and winter brassicas: kale, broccoli, spring cabbage.
Check gooseberries and currants for sawfly larvae and pick them off.
Keep ponds topped up and leave a ramp for wildlife to climb out.

The Scottish picture this month

The warmest, longest days, and frost is behind all but the highest ground. Long Scottish daylight drives fast growth, but warm humid spells start the blight and mildew watch.

Frost: Frost-free across virtually the whole country now. The safe window to plant out the last tender crops even at altitude.

Region-aware toolFrost Date CalculatorYour local last and first frost bands: the single most useful number for timing everything above.

Watch out for

Vine weevil (adults)

Adults notch leaf edges through summer. The adult stage is recorded as a summer season rather than exact months.

Leek mothRHS UK timing · uncertain in Scotland

Two UK generations: May–June and a more numerous August–October flight. Mesh over alliums is again the practical control.

UK timing, and conditional in the same way as allium leaf miner; presence in Scotland is uncertain and local timing is unverified.

Carrot flyRHS UK timing · uncertain in Scotland

The avoidance model: sowing after mid-May dodges the first generation, and lifting before late August dodges the second. A 60cm fleece/mesh barrier helps whenever carrots are up.

The generation timing is the UK model; the Scottish calendar is not separately sourced. Use it as an avoidance strategy, not a dated forecast.

Mint rustbroad seasonal window

Symptoms can appear from spring until autumn. Cut affected mint to the ground and never propagate from infected plants.

Timing is broad, close to "the whole growing season", so treat it as a standing watch rather than a monthly alert.

These problems track the weather, not the calendar. Their month-by-month activity isn't sourced, so we tie them to the conditions that trigger them rather than pretend a date:

Grey mould (botrytis)

Watch when: cool, damp, still air, especially under cover

Can occur year-round with latent infections; ventilation and airflow are the real controls. Peaks when growth is soft and air is stagnant.

Slugs & snails

Watch when: mild, wet, damp conditions, worst around soft young growth

Activity tracks moisture and temperature, so risk climbs in any mild damp spell. Pressure is highest on tender seedlings in spring and again in a wet autumn.

Sources

RHS: grow-your-own guides: sowing, planting and harvest timing for all 25 crops (each window hand-derived from the crop's own RHS prose)
GrowScotland: pest activity framing: which pests to flag each month is our own reading of RHS activity data. We surface only what RHS sources, and frame weather-driven diseases by trigger conditions rather than inventing a Scottish calendar