Mixed snapdragon flowers

How to grow snapdragons (Antirrhinum)

Find out all you need to know about growing snapdragons in this detailed Grow Guide.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sow
Sow

Do not Sow in January

Do not Sow in February

Do Sow in March

Do not Sow in April

Do not Sow in May

Do not Sow in June

Do not Sow in July

Do not Sow in August

Do not Sow in September

Do not Sow in October

Do not Sow in November

Do not Sow in December

Plant
Plant

Do not Plant in January

Do not Plant in February

Do not Plant in March

Do not Plant in April

Do Plant in May

Do Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does flower in June

Plant does flower in July

Plant does flower in August

Plant does flower in September

Plant does flower in October

Plant does not flower in November

Plant does not flower in December

Antirrhinums are cheerful annual plants, guaranteed to brighten up borders and containers.

Advertisement

Commonly known as snapdragons, these are easy-to-grow, old-fashioned cottage garden plants, beloved by children and bees. They come in a range of different colours and heights, and therefore can be grown in a variety of situations.

Attractive to wildlife, they have a long flowering period, from June until October. Taller cultivars make good cut flowers and last well over a week in water.

More Grow Guides:

Take a look at our handy antirrhinum Grow Guide, below.


Where to grow snapdragons

Snapdragon 'Constantine'
Snapdragon ‘Constantine’

Snapdragons will grow in most well-drained, fertile soils in full sun, either in borders or containers.


Planting snapdragons

Planting young snapdragon plants
Planting young snapdragon plants

Sow seeds in autumn, or early spring in a greenhouse or covered tray on a sunny windowsill. Sow seeds thinly on the surface of compost, water and seal in a propagator or clear plastic bag. Transfer seeds when large enough to handle into pots and grow on in a sheltered spot or cold frame. Plant out after danger of frost has passed. Early autumn sowings will produce early flowers in May. Follow our step-by-step guide to growing cut flowers from seed, then watch Monty Don demonstrate how to prick out seedlings.


Propagating snapdragons

Grown for their prolific flowers, you can try to persuade your plants to set seed by leaving a few blooms. However, seeds are unlikely to come true to type if sown, but it’s fun to see what does come up.


Snapdragons: problem solving

Plants are usually pest and disease-free.


Caring for snapdragons

To prolong flowering, feed weekly with a potash-rich fertiliser and deadhead spent blooms regularly. Keep plants well watered and support taller varieties with canes if required.


Snapdragon varieties to try

Antirrhinum 'Pretty in Pink'
Snapdragon ‘Pretty in Pink’
Advertisement
  • Snapdragon ‘Royal Bride’ – bears spikes of beautiful pure white flowers that have a delicate fragrance. It’s perfect for growing in a mixed border and makes an excellent cut flower. Its blooms are particularly attractive to bumblebees
  • Snapdragon ‘Night and Day’ – has dark foliage and spikes of dark, velvety-crimson flowers with sharply contrasting silvery-white throats
  • Snapdragon ‘Twinny Peach’ – is a dwarf variety, with bright yellow and orange flowers with delicately frilled petals. A compact, bushy plant, it is good for growing in containers or using to fill gaps at the front of a sunny border
  • Snapdragon ‘Madame Butterfly’ – a very colourful mixed hybrid with long-lasting double blooms