What Is Ranunculus?

Description

• Depending on the variety, ranunculus grow from 2 to 24 inches tall and bloom in nearly all flower colors. They flower from spring through summer outdoors, but when container-grown and kept indoors, they may bloom for only one or two weeks. Most ranunculus varieties grow from tubers which are dug up and stored during winter in most regions. Ranunculus are cold-sensitive, becoming injured when temperatures drop below 25 degrees Fahrenheit.

Types

• The most common ranunculus species, Ranunculus asiaticus, grows up to 18 inches tall and bears small, camellia-like blooms in white, yellow, orange, pink or red. Most ranunculus species grow from bulbs or tuberous roots, but one species -- Ranunculus repens or creeping buttercup -- is an herbaceous perennial that grows to 12 inches tall with an 18-inch spread. Its flower stems can reach up to 24 inches in height. Creeping buttercup flowers are typically yellow.

Planting

• Plant ranunculus tubers in spring or fall in a location with full to partial sunlight and lightweight, well-draining soil. Soak the tuberous roots in water for about one hour before planting. Space the tubers 3 to 6 inches apart and plant them 2 to 3 inches deep into the soil. When the flower stalks appear in spring, begin using an all-purpose, water-soluble fertilizer. Mix 1 tablespoon of fertilizer in 1 gallon of water, and apply once every seven to 14 days, according to your product's label.

Storage

• Dig up ranunculus tubers in late summer or fall after the foliage dies back. Divide the tuberous roots at this time or keep them whole. Store the tubers in sand or peat moss, placing them in a cool, dry location over the winter. Don’t allow the tubers to freeze or become exposed to frost. The ideal temperature for storing ranunculus tubers is 50 to 55 degrees Fahrenheit. Note that all parts of ranunculus plants are poisonous. Take care in handling plants, and store tubers safely away from children and pets.