Ranunculus Flower Growing Zones. Ranunculus flowers prefer areas with mild winters and long springs or hardiness zones 8 to 10 where the ideal planting time is the fall or late winter. If you want to grow ranunculus in a cooler climate such as zone seven or below Bateman advises waiting until April or the last frost of the season.
22032021 Common ranunculus varieties include Persian Buttercups Clooney Tango and Hanoi all of which perform well in USDA Plant Hardiness Zones eight to 11. In colder areas where temps dip well below freezing for extended periods of time you can start them indoorsin a hoophouse or low tunnel or in trays to plant out laterat the very end of winter. Hardiness zones are specified by the USDA and range from 1 to 10.
In parts of their zone with very mild winters the bulbs thrive when planted in the fall for March blooms.
Planted there in October or November they flower in March. 22032021 Common ranunculus varieties include Persian Buttercups Clooney Tango and Hanoi all of which perform well in USDA Plant Hardiness Zones eight to 11. They should be planted in the ground in late fall for blooms by early spring. By growing your ranunculus in small containers youll also be able to watch your flowers grow right in front of your eyes.