Establishing Bougainvillea in Phoenix: Watering and Fertilizing

A Phoenix gardener planted a small bougainvillea in full sun. Asks about watering frequency, Miracle-Gro, and mulch.

Expert Resource

Texas A&M AgriLife Extension has an excellent guide: Bougainvillea Culture

Key Adjustments for Phoenix

• Less rain, more heat: Water more frequently than South Texas guide suggests.
• Establishment (first 3 months): Water deeply 2-3x/week. Don't let root ball dry out.
• After established: Water deeply but infrequently—let soil dry between waterings. Bougainvillea blooms best under slight drought stress.
• Fertilizer: Use balanced (10-10-10) or bloom booster (high P) monthly during growth. Miracle-Gro is fine.
• Mulch: Apply 2-3 inches organic mulch (keep away from trunk). Conserves moisture, cools roots.

Full sun, reflected heat, and good drainage are essential.