Ranunculus--also called buttercup--blooms generally in the spring and early summer. Often, many people refer to their underground root structures as bulbs; however they are actually tubers.While ranunculi are normally planted outdoors, they make excellent indoor plants. You can plant several ranunculi together in one pot if desired.
Soak ranunculi tubers overnight prior to planting to hasten root formation. Do this at room temperature.
Fill your planting container with a high quality potting soil. You can use any size container that is at least 6 to 8 inches deep and has holes for good water drainage. The pot's diameter can vary, but it should be at least 4 inches wide, a size that will hold one plant.
Use your hands to plant ranunculi tubers so that the claw-like end is facing down. The top should be 2 inches beneath soil's surface. Space multiple ranunculi about 4 inches apart from one another.
Water well and pat the soil firmly down to get rid of any air pockets. Place the container in a sunny area of your home. A south facing window is best.