Blackout Coral Bells thrive in well-drained soil with partial to full shade, ensuring their dark foliage remains vibrant. Water consistently, allowing the soil to dry slightly between waterings to prevent root rot. During the growing season, apply a balanced, slow-release fertilizer to support healthy growth. In spring, remove any dead or damaged leaves to encourage new foliage. Divide the plants every 3-4 years to maintain vigor and prevent overcrowding.