Why Bougainvillea Stops Blooming and Indoor Oleander Care

Bougainvillea Bloom Failure

In NE Pennsylvania, a bougainvillea that bloomed well last year but produced no flowers this summer likely received too much water. Excessive rainfall or irrigation promotes vegetative growth at the expense of colorful bracts. Other causes include insufficient sun, pest infestations, or high-nitrogen fertilizer.

Corrective Measures

• Reduce watering: allow soil to dry between deep soakings.
• Ensure full sun (6+ hours).
• Apply a low-nitrogen, high-phosphorus fertilizer (e.g., 5-10-10).
• Prune hard in late winter to stimulate new flowering wood.

Indoor Oleander (Nerium oleander) Care

• Light: Bright south or west window.
• Humidity: Mist frequently to deter spider mites.
• Water: When top inch of soil is dry; never let sit in water.
• Fertilizer: Half-strength soluble (e.g., Miracle-Gro) monthly.

Both plants thrive on neglect—lean conditions encourage blooms.