Prepare the flower bed or planter with well-drained soil. If you are using a planter, choose one large enough to accommodate the large root systems of the ranunculus plants. A 10-inch pot can accommodate one to two jumbo ranunculus seedlings or three seedlings of a smaller variety.
Make a small hole in the soil with your finger or a gardening trowel. The hole should be one to two inches deep or large enough to fully cover the root ball of the seedling.
Remove the seedling from the starter tray by pulling it up gently from the roots.
Place the root ball of the seedling into the hole. Gently hold the seedling upright as you fill in the hole with potting soil.
Water ranunculus seedlings thoroughly after planting. Ranunculus plants thrive in low-moisture environments, so plants only need to be watered when the soil is dry.
Cover the soil in the flower bed or planter with a mulch of your choice to retain water and protect the plants from extreme temperatures.