Can Ranunculus Grow In Zone 5. Zone 8 to 10. Id heard from a local flower farmer that you could grow them in high tunnels a sort of.
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. They are easily damaged by temperatures below 28 F. The ranunculus Ranunculus asiaticus is even more tender.
Most gardeners regardless of zone can grow ranunculus you simply have to understand what they like in order to be their blooming best.
Plant outdoors by mid-April in zones 6 and 7 mid-May in zones 4 and 5. The potting soil should drain well. If you live in one of those climates with awesome weather thats totally conducive to growing ranunculus this post probably isnt for you but please do feel free to stick around and enjoy the pictures. Those with colder winters can plant in late winterearly spring once the threat of hard frosts is over.