Softwood Cutting Propagation for Unknown Flowering Shrub

Propagating an unidentified 15-foot flowering shrub with white flowers (more abundant in sun) requires softwood cutting technique during the active growing season.

Propagation Protocol

1. Timing: Late spring to early summer — when new growth is firm but not woody.
2. Cutting selection: 6-inch terminal cuttings, pencil-thickness, from healthy shoots.
3. Preparation: Remove lower leaves; retain 2-3 upper leaves (cut large leaves in half).
4. Hormone treatment: Dip basal 1 inch in rooting hormone powder (IBA-based).
5. Medium: Moist potting mix (peat/perlite/vermiculite) — NOT garden soil or bagged topsoil.
6. Humidity chamber: Clear plastic bag over pot, secured, in bright indirect light.
7. Monitoring: Check weekly; water only if media feels dry or no condensation visible.
8. Rooting time: 6-8 weeks typical for woody shrubs.

Success Factors

• High humidity (plastic bag) prevents desiccation before roots form.
• Indirect light avoids overheating in the humidity chamber.
• Well-drained medium prevents rot — the #1 cutting failure cause.
• Patience — some species root slowly; don't disturb for 8 weeks.

After Rooting

Gradually acclimate to lower humidity over 1-2 weeks. Pot into individual containers. Grow one full season before landscape planting.