Ranunculus is a flowering perennial plant that grows 2 to 14 inches in height and blooms in spring and summer. Different varieties of rununculus will bloom in a multitude of colors, even a soft, pale blue. Ranunculus thrives in areas with mild winters and cool summers and is hardy to U.S. Department of Agriculture plant hardiness zone 8. Usually grown from rhizomes, it is possible to start ranunculus from seed, in the early spring.
Fill a seed-starting flat with equal parts of perlite and peat moss. Moisten the mix, stirring to ensure that it is evenly moist. Allow the flat to drain completely.
Scatter the ranunculus seeds thickly over the surface of the soil in the flat. Cover them with a 1/4-inch layer of moist peat moss.
Cover the flat with plastic wrap and place it in the refrigerator for three weeks.
Remove the flat from the refrigerator and move it to a shady part of the garden. Allow the plastic wrap to remain until the seeds germinate which should occur within 14 to 90 days.
Thin seedlings to 2 to 3 inches apart. Keep the seedlings watered as they develop.
Transplant the ranunculus seeds when they have four sets of leaves. Choose a sunny location of the garden and plant the seedlings the same depth as they grew in the seeding flat. Keep the seedlings moist while they become established in the garden.