Answer: Ranunculus will grow in containers and survive 40F weather. If it gets much colder you might consider digging the bulbs and storing them over the winter months. Here's how to plant:
Fill your containers with good quality, well-draining potting soil. Make sure there are adequate drainage holes; ranunculus must never sit in waterlogged soil or they will rot. Site containers where they will receive full day sun. Plant your ranunculus 2? deep and 4?-5? apart for the most brilliant display. The bulbs look like small, dark bunches of bananas, a curious shape that makes it easy to determine which side is up and which is down for planting. Tuck your ranunculus into the planting hole with the ?bananas? pointing down.
After planting, water ranunculus well, thoroughly soaking the soil.
At the end of the summer the leaves will yellow and die back as the plant slips into dormancy. Foliage many be removed at this point. Your ranunculus will rest for a few months before beginning the next growing cycle.
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