Bougainvillea Uneven Leaf Loss: Water and Insects

Two bougainvilleas 12 ft apart on trellis; one losing leaves bottom-up with new growth returning. Same water/care. No visible insects.

Factors

• Bougainvilleas need water for lush growth—myth they don't.
• One may be in sandier, faster-draining spot.
• They do get a chewing bug—neem oil (organic) helps.
• Prune after bloom (flowers on new wood) to encourage more blooms.