What Seeds to Sow in October in Northern Europe (Cool Summer Climates)

What to Sow in October
Cool climates · shorter days · colder nights · next spring starts now

October is not a month for sowing everything. It is a month for choosing the right strategy. Hardy annual flowers can still be sown for an earlier display next year, sweet peas are ideal for protected autumn sowing, selected salads can continue under cover, and a few perennial seeds can use winter cold as part of their germination process.

The farther north, wetter or more exposed your garden is, the more you should move October sowings into pots, a cold frame or an unheated greenhouse rather than sowing directly into open ground.

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What Should You Sow in October?

Choose the route that matches your garden rather than the calendar alone.

Mild & Sheltered

Soil is still workable and drains well

Direct-sow hardy annuals such as calendula, cornflowers, nigella, poppies and linum. In mild areas, autumn peas and selected California poppies can also be tried.

See outdoor sowings →
Cold / Wet / Exposed

Winter arrives quickly

Sow hardy flowers into pots rather than saturated ground, then keep them in a cold frame or bright sheltered place. Avoid forcing tender crops through shortening days.

See protected sowings →
Cold Frame / Greenhouse

You have unheated protection

October becomes much more productive. Start sweet peas, selected cut flowers and small batches of cool-season leaves for slow autumn and winter growth.

Use your protected space →
Long-Game Sowing

Use winter cold to your advantage

Eryngium, lavender and Verbena bonariensis are useful October projects when you are happy to sow now and wait. Cold, moist conditions can help break seed dormancy.

Cold-stratification projects →
The Safest Choices

Fontana’s Best October Bets

If you only want the strongest choices for northern Europe, start here.

04

Annual Poppies

Direct sow. Poppies dislike root disturbance, so October is a good opportunity to sow them where they will flower.

Browse poppy seeds →
06

Spinach Renegade

A particularly useful cool-season vegetable. Protect October sowings with fleece, a cloche, cold frame or greenhouse.

Organic Spinach Renegade →
Hardy flowers to sow in October in northern Europe
Outside in October

Hardy Flowers to Direct-Sow Now

These are the most useful open-ground October sowings in the Fontana range. Choose a sunny, weed-free position and free-draining soil. In very cold northern or continental areas, pots in a cold frame are safer than direct sowing late in the month.

Good on drained soil

Linum Grandiflorum Mix

Autumn sowing can give flax an earlier start next year. It is a better choice on light, free-draining soil than on heavy winter-wet ground.

Linum Grandiflorum Mix →
Cold-climate adjustment: In Scandinavia, the Baltics, higher elevations and colder inland areas, October germination may be too slow for reliable establishment. Sow these hardy annuals earlier in October, use pots in a cold frame, or save part of the seed for spring as insurance.
Cold Frame · Unheated Greenhouse · Bright Shelter

October Sowing Under Cover

Protection does not mean heat. Most useful October sowings want good light, cool temperatures, ventilation and protection from persistent rain, severe frost, slugs and mice.

Seeds to sow under cover in October
Top protected flower

Sweet Pea King Size Coronation Mix

October is a classic time to sow sweet peas under glass. Use deep pots or root trainers, keep seedlings cool and bright, and overwinter them in a cold frame or unheated greenhouse. Autumn-sown sweet peas develop strong roots and can flower earlier next year.

View Sweet Pea King Size Coronation Mix
ContainerDeep pots / root trainers
After germinationCool & bright
WinterCold frame / unheated greenhouse
Main riskMice, slugs & wet compost
For spring flowers

Iceland Poppy — only if conditions suit

Iceland poppies prefer cool conditions and can be autumn-sown, but October is best treated as a specialist sowing. Surface-sow, keep evenly moist and protect young plants from prolonged winter wet. Skip this if your winters are very wet and your protected space is dark.

Iceland Poppy Champagne Bubbles White →
Let Winter Do Some of the Work

Seeds That Can Use an Autumn Cold Period

These are not quick October crops. They are worthwhile projects for gardeners who enjoy starting perennials from seed and are prepared for slower, sometimes irregular germination.

Eryngium Blue Hobbit

Eryngium seed benefits from a cold period. Sow into a pot of moist, free-draining compost and expose it to cool conditions, or use the refrigerator method described in the growing instructions. Germination can be irregular, so do not discard the pot too quickly.

Eryngium Blue Hobbit →

Organic Lavender

Autumn sowing can provide the cool, moist period lavender seed often benefits from. Surface-sow or cover very lightly, keep the pot outside in a sheltered position or cold frame, and expect germination to be slower than annual flowers.

Organic Lavender →

Verbena Bonariensis

Verbena bonariensis can be sown in autumn. Its germination is naturally erratic, so an outdoor or cold-frame pot that experiences winter temperature changes can be useful. Keep the compost moist but never saturated.

Verbena Bonariensis →
Important: Cold-stratification sowings are different from hardy annuals. Do not expect all seeds to germinate quickly in October. Label pots clearly and leave them undisturbed long enough for winter conditions to do their work.
Vegetables and herbs to sow in October under cover
Edible October Sowing

What Is Still Worth Sowing for Food?

In northern Europe, October vegetables are mainly a protected-growing project. The goal is not rapid summer growth: think baby leaves, slow overwintering crops and early spring harvests. Light becomes as limiting as temperature.

Variety Where to sow Best October use October note
Organic Spinach Renegade Cold frame, greenhouse, cloche; mild gardens outdoors Overwintering leaves Strong choice
Organic Mesclun Asian Mix Greenhouse, cold frame or bright sheltered containers Baby leaves Best early October
Organic Mesclun Salad Leaves Protected containers / greenhouse Young cut-and-come-again leaves Protected only
Organic Coriander Greenhouse, cloche or sunny windowsill Leaves / microgreens Useful autumn herb
Organic Lettuce Oakleaf Salad Bowl Greenhouse or cold frame Young leaves rather than full heads Not a dedicated winter lettuce
Organic Radish Cherry Belle Cold greenhouse / protected container Small roots or leaves Growth slows sharply
Organic Chard Fireworks Greenhouse border / containers Baby leaves Slow but possible
Organic Parsley Italian Giant Greenhouse / sheltered pots Long-term overwintering pot Slow germination
Organic Rocket Esmee Indoors or well-protected greenhouse sowing Young leaves September is easier
Mild areas only

Organic Pea First Early May

This round-seeded, cold-tolerant early pea can be autumn-sown for an early crop where winters are relatively mild. Choose a sheltered, well-drained site and protect young plants from birds, severe frost and saturated soil. In colder continental or northern regions, wait until late winter or spring.

View Organic Pea First Early May
Not all Fontana peas are October peas.

Sweet Horizon and Norli are excellent cool-season peas, but they are not the varieties we would prioritize for an October overwintering sowing in northern Europe.

Timing Matters

Early October vs Late October

The useful sowing window contracts quickly as light levels and soil temperatures fall.

1–10 October

Make the most of workable soil

Best time for direct hardy annuals, wildflower mixes on light soil, early protected scabiosa, mild-area peas and the last outdoor sowings under fleece.

11–20 October

Move towards protection

Continue calendula, cornflowers, nigella and poppies where conditions remain suitable. Prioritize sweet peas, spinach, coriander and protected baby leaves.

21–31 October

Stop chasing fast growth

In colder areas, focus on cold-stratification projects and protected sowings rather than expecting rapid germination outdoors. Good drainage, ventilation and winter protection matter more than sowing more seed.

October Technique

Five Things That Matter More This Month

1. DrainageCold-tolerant seedlings often cope with frost better than with saturated compost or soil.
2. LightShort days mean growth slows. Give protected seedlings the brightest position available.
3. AirflowVentilate cold frames and greenhouses on mild days to reduce damping off and mould.
4. Water carefullyWater less often than in summer and preferably earlier in the day so plants are not wet overnight.
5. Keep spring insuranceIn very cold areas, do not use an entire packet for autumn sowing. Keep some seed for spring.
October in Northern Europe

Sow Less — Choose Better

For most gardeners, the strongest October plan is simple: hardy annual flowers outdoors, sweet peas under cover, spinach and a few salad crops in protected space, and perennial seeds that benefit from winter cold.