Plant Primo® Pistachio Ambrosia Coral Bells in well-draining soil with partial to full shade. Space plants about 12-18 inches apart. Water regularly to keep the soil consistently moist but not waterlogged. Fertilize in early spring with a balanced, slow-release fertilizer. Remove spent flowers to encourage new blooms. Divide clumps every 3-4 years in early spring or fall to maintain vigor. Protect from harsh winter conditions with a light covering if necessary.