Persian buttercups (Ranunculus asiaticus) is a perennial plant that can grow to be a foot and a half tall. They have blooms that resemble roses, that can be in the color of creme, orange, red, yellow or white. Persian buttercups have a root structure called tubers, which are hardy in USDA hardiness zones 9 to 10 and can be planted in the fall or early spring. In colder zones, the tubers should be planted in the spring, and dug up and stored in the fall for the winter.
Choose a planting location that is in full sun and in soil that drains well. Dig a hole that is 2 feet deep and fill it completely with water. Check it after 24 hours. If there is still water in it, you need to improve the soil (see step 2).
Till the top 1 to 1.5 feet of your soil and mix in 3 to 4 inches of organic matter, such as compost or peat moss, if you need to improve the soil. This will create a planting bed that is slightly raised, which is also good for drainage.
Dig holes so that the top of the tubers are 2 inches beneath the soil. Space multiple tubers 4 to 6 inches apart.
Backfill the soil and use the palms of your hands to pack it firm. This will remove any air pockets, which can later rot the tubers.
Water the tubers well and cover the planting site with a couple of inches of mulch, such as bark, wood chips or pine needles.