Grow Hydrangeas from Cuttings Easy & Rewarding! steps: 1. Choose a healthy, non-flowering stem 56″. 2. Trim to 2 leaves & cut at a 45 angle dipping in rooting hormone is optional. 3. Plant in well-draining soil with perlite. 4. Cover with a plastic bag for humidity. 5. Keep soil damp & provide bright, indirect light. 6. Check for roots in 24 weeks. 7. Transplant once rooted morning sun afternoon shade. Not every cutting will take, but with care and patience, youll grow gorgeous hydrangeas!