Primrose

Primula vulgaris · Flower

Quick answer: Water: Keep soil moist; check every 2–3 days in spring (estimated). Light: Partial shade; full sun only where summers are cool. Soil: Humus-rich, moist but well-drained. Pets: ASPCA lists primrose as toxic to cats and dogs; it is usually linked to mild stomach upset. Keep pets from chewing the plant. If in doubt, ask your vet.

A small woodland perennial with pale yellow flowers sitting on a rosette of crinkled leaves. It is one of the first plants to bloom after winter and is happiest in cool, moist, partly shaded ground or in spring containers.

Care at a glance

Light

Partial shade; full sun only where summers are cool

Water

Keep consistently moist, never waterlogged

Soil

Humus-rich, moist but well-drained

Temperature

Very hardy (RHS H7, below -4 °F); struggles in hot summers

Spacing

8–12 in apart (estimated)

Container

6–8 in pot or window box (estimated)

Bloom

Late winter into spring

Lifespan

Short-lived perennial; often grown as a biennial

When?

Set out young plants in autumn or early spring when the soil is cool and moist. Sow seed as soon as it is ripe in summer or early in the year; flowering usually follows the next spring.

Step by step

1. Choose a sheltered place with shade from hot afternoon sun.
2. Mix compost or leaf mould into the soil before planting.
3. Plant at the same depth as in the pot, keeping the rosette above soil level.
4. Water regularly so the soil never fully dries out, especially in spring and summer.
5. Mulch around plants to keep roots cool and moist.
6. Remove faded flowers to keep the plant tidy.
7. Lift and divide crowded clumps after flowering to renew them.
8. If you feed, use a general fertilizer and follow the product label instructions.

Common problems

Pets

ASPCA lists primrose as toxic to cats and dogs; it is usually linked to mild stomach upset. Keep pets from chewing the plant. If in doubt, ask your vet.

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