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Perennial · Primulaceae
Primrose
Primula vulgaris
In other languages: Stengelloze sleutelbloem (Nederlands) · Primevère acaule (Français)
The primrose is a native plant of western and southern Europe that grows wild in deciduous woods, hedgerows and on shady banks; in Belgium it is fairly rare in the wild. From a rosette of wrinkled, tongue-shaped leaves, numerous pale yellow flowers with a deep yellow eye appear from February to May, each on its own hairy stalk. Gardeners value it as one of the first flowers for bees and as a natural ground cover under shrubs. The brightly coloured primulas sold in small pots in winter are garden forms; the wild species is usually tougher and lasts for years.
Caution: The plant is mildly poisonous: do not eat it and keep an eye on young children and pets. The leaves can irritate sensitive skin; wear gloves when dividing a lot of clumps.
Light
Partial shade or shade
tolerates little sun
Moisture
Normal
no wet feet
Legal basis
Loam or clay
any pH
Hardiness
Fully hardy
down to -25 °C
Size
0.15 m
tall, 0.25 m wide
Flowering
February–May
| Height | 0.15 m |
|---|---|
| Native to Belgium | Yes |
| Good for bees, butterflies and birds | Yes, for bees |
| Poisonous to people and pets | Yes, take care with children and pets |
| Flowering | February–May |
Identify
Primrose: how do you recognise it?
- Habit
- Low rosette about 15 cm tall and 25 cm wide, with no true flower stem.
- Leaves
- Tongue-shaped and wrinkled, up to 20 cm long, fresh green with a hairy underside; partly evergreen in mild winters.
- Flower
- Five heart-shaped notched petals, 2–4 cm across, each on its own stalk, from February to May.
- Colour
- Pale yellow, softer than the cowslip, with a deep yellow to orange eye.
- Seed
- Small round capsules; each seed has an oily appendage that attracts ants, which spread it.
Flowering: February–May · Plants: March–April and September–October
In your garden
Why grow it?
- One of the first to flower: colour under shrubs and in grass from February.
- An important early nectar source for bumblebee queens, bee-flies and the brimstone butterfly.
- Native and good for biodiversity in a wildlife-friendly garden.
- Self-seeds gently and forms lovely drifts after a few years.
- Small and modest: fits into any garden, including pots and window boxes.
Primrose: where does it grow best?
- Partial or light shade, for example under deciduous shrubs or trees: light in spring, cool in summer.
- Humus-rich, moisture-retentive loam or clay; acid to chalky is fine.
- The soil must not dry out in summer; it dislikes full midday sun.
- Plant 20–25 cm apart, in groups for the best effect.
- Light
- Partial shade and shade
- Soil type
- Loam or clay
- Acidity
- Not fussy
- Moisture
- Normal
- Size
- 0.15 m tall, 0.25 m wide
- Hardiness
- Hardy (to -25 °C)
Goes well with
- Wood anemone: White stars that flower at the same time under shrubs.
- Lungwort: Blue and pink flowers and spotted leaves, also for partial shade.
- Wild daffodil: Pale yellow trumpets that go well with the soft yellow primroses.
- Ferns: They fill the space in summer, when the primrose is resting.
- Snowdrop: Flowers just before, in the same shady corner.
Maintenance
Primrose: when and how to plant it?
Plant in March–April and September–October.
- Plant in March–April or September–October.
- Loosen the soil and mix in leaf mould or well-rotted compost.
- Set the rosette at the same depth as in the pot, with the crown just above the soil so it does not rot.
- Leave 20–25 cm between plants and plant in groups of five or more.
- Water straight away and keep the soil moist for the first few weeks.
- A thin layer of leaf mould around the plants keeps the soil cool.
Care
- Water
- Water in dry spells in spring and summer, especially newly planted ones and plants in pots.
- Feeding
- A layer of leaf mould in autumn is enough. No extra fertiliser is needed.
- Spent flowers
- Leave them if you want it to self-seed; otherwise cut them off for a tidy plant.
- Dividing
- Pull large clumps apart after flowering and replant the pieces straight away.
- In pots
- Use a free-draining potting mix in a pot with a drainage hole, and keep it in a shady spot in summer.
Tip: Pull large clumps apart after flowering and replant them straight away: you will soon have a carpet of spring flowers. Plant them under deciduous shrubs, where they get light in spring and shade in summer.
Primrose: when to prune it?
When: No pruning is needed. After flowering you can remove spent flowers and yellow leaves.
How:
- Cut off faded flowers with their stalks if you do not want seedlings.
- Let some flowers set seed if you want it to self-sow.
- Gently pull away yellow or rotting leaves so slugs and moulds get no chance.
Propagation
- Division
- After flowering, in May–June, or in September: lift the clump, pull it into pieces each with a rosette and roots, and replant straight away. Water well.
- Seed
- Sow fresh seed in summer in a pot of seed compost and stand it outdoors in the shade. The seed often only germinates after a cold spell, in spring.
- Seedlings
- Move self-sown seedlings with a little soil in spring or autumn.
Primrose: how does it get through the winter?
Hardy to −25 °C.
- Hardy to about −25 °C: no protection is needed in Belgium.
- The leaves stay partly green in mild winters; in hard frost they die back and the plant shoots again in spring.
- In a pot: make sure the compost does not stay wet and stand the pot sheltered against a wall.
Diseases and pests
- Vine weevil: Notched, half-moon edges on the leaves and plants that suddenly wilt: the larvae eat the roots, especially in pots. Use nematodes in spring or late summer.
- Slugs: They eat leaves and flowers. Pick them off in the evening or set a beer trap.
- Birds: Sparrows and finches sometimes shred the flowers. A few twigs or a net over the plants during flowering helps.
- Dried-out plants: Limp, yellow leaves in summer: too dry or too much sun. Water and choose a cooler spot.
Through the year
- February: First flowers. Watch for sparrows pecking the flowers.
- March: In flower. Plant.
- April: Full bloom. Plant. Watch for slugs.
- May: Last flowers. Pull large clumps apart and replant.
- June: Collect seed and sow in a pot. Water in dry spells.
- July: Keep the soil moist in the shade.
- September: Plant and divide.
- October: Plant. Mulch with leaf mould.
Use
Edible and useful
Not edible. These primroses are mildly poisonous: eating them can cause vomiting and stomach ache, in children as well as in dogs and cats, and the fine hairs on the leaves and stems can cause a rash in sensitive people. Do not confuse them with the cowslip (Primula veris), whose flowers you can use: these primroses are not eaten, not even the flowers. Wear gloves if you divide or move a lot of clumps, and wash your hands afterwards. Keep pots and troughs of primroses, which often stand on the table or windowsill, out of reach of small children and pets. If any is swallowed, call a poison centre (in Belgium 070 245 245) or your doctor at once.
Good for wildlife
- Bees
- Nectar and pollen for honeybees and wild bees.
You and this species
Did you know?
- The name primrose comes from the Latin prima rosa, ‘first rose’: it is one of the first flowers of the year.
- There are two kinds of flower: with a long style and short stamens, or the other way round. Charles Darwin studied this system, which discourages self-pollination.
- Each seed has an oily appendage that attracts ants. They carry it off and so spread the plant.