Winter flower Growing Guide 

Sowing Snapdragons in Winter & Other Hardy Flowers

Winter might look like the garden's quiet season, but underneath all those grey skies, there's plenty of potential for next year's flower display. While the rest of the garden is having a little snooze, we can be planning a colourful, pollinator-friendly flower patch.

The trick is choosing the right flowers and knowing which seeds prefer a little winter chill and which would rather wait for spring.

1. Snapdragons (Antirrhinum)

Can you sow snapdragons in winter? Absolutely!

Snapdragons are tender perennials often grown as annuals. In Ireland, you can sow them in autumn or late winter under cover, giving the plants time to establish before flowering.

• When: October to February under cover, depending on conditions.

• Where: A bright windowsill, greenhouse or frost-protected growing space.

• Temperature: A cool, bright environment is ideal once seedlings emerge.

• Flowering: Usually late spring through summer, depending on variety and sowing time.

How to sow snapdragons

1. Fill a seed tray with fine, peat-free seed compost.

2. Sprinkle the tiny seeds on the surface. Don't cover them deeply because they need light to germinate.

3. Mist gently with water to avoid washing the seeds away.

4. Place somewhere bright and cool, ideally around 15–20°C for germination.

5. Keep the compost lightly moist, not waterlogged.

6. Pot on the seedlings once they are large enough to handle.

Organic Yarden tip: Snapdragons can take their time germinating, so don't give up on them after a week. Keep the tray labelled and give them a little patience!

2. Echinacea (Coneflower)

Echinacea is a wonderful perennial for a wildlife-friendly garden. Its daisy-like flowers attract pollinators, and the seed heads can provide food for birds if left standing.

• When: Late winter to spring under cover, or autumn for some outdoor sowings.

• Where: Seed trays in a greenhouse or a sheltered outdoor spot.

• Germination: Can be slow and irregular; some seed benefits from a period of cold, moist conditions.

• Flowering: Often from the second year when grown from seed.

How to sow echinacea

1. Sow the seeds in pots or trays of peat-free seed compost.

2. Cover lightly with compost or fine vermiculite.

3. Keep the compost moist but well drained.

4. If germination is poor, try cold stratification: place the sown tray in a sheltered, cold location or follow the seed supplier's instructions for a period of chilling.

5. Once the seedlings are large enough to handle, pot them individually and grow them on in good light.

A little patience goes a long way: Echinacea isn't always a first-year flowering wonder. You are growing a perennial investment in future summers, not ordering instant flowers from a garden vending machine!

3. Other hardy flowers to sow over winter

Here are some more flowers to consider for your Irish garden.

Aquilegia (Granny's Bonnets)

A cottage-garden favourite with delicate, nodding flowers. Sow in autumn or spring; some seed germinates better after a period of cold.

Best for: Part shade, borders and naturalising.

Calendula (Pot Marigold)

A cheerful, easy-to-grow annual. Sow in autumn in mild, sheltered conditions or in spring for a reliable summer display.

Best for: Beginner gardeners, containers and pollinators.

Cornflowers

Hardy annuals that can be autumn-sown in a sheltered spot or spring-sown. Autumn sowings may flower earlier the following year.

Best for: Sunny spots, cut flowers and bees.

Larkspur (Consolida)

A beautiful hardy annual with tall flower spikes. It can be sown in autumn or early spring and dislikes having its roots disturbed.

Best for: Cottage gardens and cut-flower displays.

Sweet William

A hardy biennial or short-lived perennial, usually sown in late spring or summer for flowering the following year. Young plants can be overwintered in a sheltered place.

Best for: Fragrant flowers and pollinator-friendly borders.

Achillea (Yarrow)

A hardy perennial that can be started under cover in late winter or spring. Its flat flower heads are valuable for a range of beneficial insects.

Best for: Sunny borders, drought-tolerant planting and wildlife.

Scabious

Many varieties are hardy perennials. Sow in late winter or spring under cover, following the variety's germination instructions.

Best for: Bees, butterflies and long-lasting summer colour.

4. What can you sow outside during winter?

Winter sowing doesn't always mean sowing into a warm house. Many hardy seeds can be sown outdoors or in unheated greenhouses, provided drainage is good and the compost doesn't become waterlogged.

Winter sowing shortlist

Hardy annuals

Cornflowers, larkspur and calendula — autumn sowing is possible in suitable conditions.

Perennials that benefit from cold

Some echinacea and aquilegia varieties — check whether the seed needs stratification.

Seeds to start under cover

Snapdragons and achillea, particularly from late winter onwards in a bright, sheltered space.

Remember that Ireland's winter weather can be wet rather than consistently frozen. Protect pots from prolonged saturation, provide drainage and ventilate greenhouses on mild days. Seeds need moisture, but they don't want to spend winter swimming!

5. My simple winter flower-sowing routine

If you're gardening in pots, containers or a small yard, you don't need a huge greenhouse or a fancy propagation setup.

• Step 1: Gather your seeds and check the packet instructions.

• Step 2: Use clean seed trays or recycled pots with drainage holes.

• Step 3: Choose peat-free seed compost.

• Step 4: Label every pot. Future-you will be grateful.

• Step 5: Keep seed trays in a sheltered position with the right light and temperature for each variety.

• Step 6: Check moisture regularly and remove any seedlings that show signs of damping off.

• Step 7: Harden off young plants gradually before planting them outside in spring.

One of the best things about growing flowers from seed is that you can fill your garden with colour without spending a fortune. And when those first flowers open, you'll know that a little winter planning made it happen.

A final thought from The Organic Yarden

Winter doesn't have to mean putting gardening on hold. It can be the season when we sow the beginnings of next year's wildlife-friendly garden, one tiny seed at a time.

Whether you're growing snapdragons for a colourful container, echinacea for your perennial border, or cornflowers for the bees, there's always something to look forward to.

Start small, grow organically, and enjoy the process. Your future garden will thank you.

Important note for Irish growers: October sowing is suitable for some hardy annuals and perennials, but not every flower benefits from being sown in winter. Always check the seed packet for sowing depth, chilling requirements and temperature. Tender or slow-growing seedlings may need protection until spring.