Reviving a Root-Bound Cordyline in a Half Barrel

Old Potting Mix Is the Problem

After 4 years, the mix has broken down—no aeration, no nutrients, salt buildup. The 14-ft height makes repotting daunting but necessary.

Option 1: Drastic Renewal (Best Long-Term)

1. Cut trunk back to 2-3 ft in spring.
2. Remove from barrel (may need help/saw).
3. Shave off outer root mass (1-2 inches).
4. Repot in fresh mix in same or new container.
5. New shoots will emerge from cut point—multi-stemmed, fuller plant.

Option 2: Top Dressing (Temporary)

• Remove top 4-6 inches of old mix.
• Replace with fresh mix + slow-release fertilizer.
• Water with liquid seaweed.
• Helps short-term but doesn't fix root zone.

Ongoing Care

• Repot/root prune every 2-3 years.
• Fertilize monthly in growing season (balanced).
• Water deeply when top 2" dry.
• Bright light—full sun if acclimated.

Yellowing central leaf spine = classic root-bound/nutrient lockout symptom. Renewal is the cure.