Dividing Agapanthus: When and How

Gardener asks when and how to divide agapanthus.

Expert Method (Successful but Unconventional)

• Divide in spring when growth starts.
• Sign: more bulbs than roots in pot.
• Hard to tease apart — use knife to cut clump into pieces with ≥3 bulbs each. Lose some bulbs, but plenty remain.
• May lose one year's bloom if traumatic.
• Pot divisions in containers they'll fill in 3 years — agapanthus likes crowding.
• Use ProMix + slow-release Osmocote (14-14-14). High nitrogen reduces flowers.