Prepare a planting location for your kale flowers during the early fall, preferably August through September. Break up the soil in your chosen planting area using a pitchfork.
Dig holes for the ornamental kale plants using a hand shovel. The holes should be the same height and depth as the plants' nursery containers. Space each hole 10 to 12 inches apart.
Remove the kale flowers from their nursery containers. Deposit one plant in the center of each hole. Backfill the holes and pat the soil around each plant.
Water the kale flowers deeply after planting, using a garden hose. Keep the soil moist to a 1-inch depth at all times throughout the growing season.