Planting time Ranunculus are ground-hardy in warmer areas and can be planted in the autumn between October and November or in the spring when the danger of frost has passed. It is easiest to grow the bulbs in pots, overwintering them in a greenhouse or cold frame and bringing them out in spring. Good ventilation is required. How to grow Soak the tubers for an hour to hydrate them. Plant into well drained and fertile soil in full sun. Incorporate well-rotted manure for strong plants. If planting in pots, put grit in the bottom of the pots and fill with a quality multipurpose compost and add some extra grit to ensure good drainage. Plant 3-5 cm deep and 6-10 cm apart, ‘eyes’ up and claws facing down. Grow in a sheltered position and protect from strong and cold winds. How to look after Water plants well during dry periods and feed with a high potash fertilizer once they start flowering. Dead head regularly to encourage more flowers. Do not cut the foliage down until the plants are fully dormant.