How to Plant Ranunculus: Complete Growing Guide

Ranunculus are loved for their large, rose-like flowers and vibrant colours. Grown from claw-shaped corms, these half-hardy plants will thrive with the right care.

When to Plant Ranunculus

Plant ranunculus corms in autumn or late winter/early spring. Especially in places with mild winters, ranunculus corms will do well when planted in the fall (zone 7 and above).

Where to Plant Ranunculus

Plant in a sunny, sheltered spot with moist, well-drained soil. Ranunculus do best with protection from strong winds to keep their delicate blooms pristine. These flowers are partially hardy – they can tolerate light overnight frosts, but not prolonged freezing conditions. In colder climates, start ranunculus in pots inside a cool greenhouse or cold frame and transplant after the last frost.

Preparing Ranunculus Corms (Bulbs)

Soak Ranunculus corms in room temperature water for 3–4 hours before planting. Once you’ve finished soaking them, you will notice that the corms have become plump.

How to Plant Ranunculus

Direct in the Garden: Plant Ranunculus bulbs outdoors once the risk of hard frost has passed. Place corms with the claws facing downward about 2–3 cm deep in soil.

In Pots: Pot up corms individually into 9 cm pots and grow them on in a cool, frost-free place. Transplant only when roots have filled the pot and soil stays intact—Ranunculus do not like root disturbance.

Ranunculus Care and Aftercare

Water thoroughly after planting, then keep the soil consistently moist (but not waterlogged). Expect blooms about three months after planting. You can expect to see flowers continue to bloom for 4-7 weeks depending on planting time.

Maintenance

Continue regular watering throughout the growing season, especially in dry periods, to keep Ranunculus flowers blooming strong.