Sunlight:
Bougainvillea loves the sun. Give it at least 6 hours of direct sunlight daily. Outdoors is best, but indoors can work if placed by a bright south-facing window or under grow lights.
Watering:
- Allow the soil to dry slightly between watering
- Water deeply until it runs out of the drainage holes
- Avoid soggy soil at all costs — it causes root rot and leaf drop
Feeding:
Use a low-nitrogen, high-phosphorus fertilizer every 3–4 weeks during the growing season (spring through fall). Stop feeding during dormancy in winter.
This fertilization schedule will encourage rich, continuous blooming.
🛠️ Step 5: Repotting and Seasonal Care
Bougainvillea bonsai should be repotted every 2–3 years, preferably in early spring before new growth starts.
Repotting Tips:
- Trim back roots gently
- Refresh the soil mix
- Do not water for 2–3 days after repotting to allow roots to heal
In winter, protect your tree from frost. Move it indoors or into a greenhouse if temperatures drop below 5°C (41°F).
🌸 Common Bougainvillea Bonsai Problems (and Fixes)
- No blooms? It might need more sun, less water, or a phosphorus boost
- Leaves dropping? Often caused by overwatering or sudden temperature changes
- Pests like aphids or scale? Spray with neem oil or insecticidal soap
Final Thoughts
A Bougainvillea bonsai brings tropical color and artistic beauty into any space — but it thrives best when you understand its rhythm. With full sun, smart watering, and timely pruning, you’ll enjoy a vibrant, flowering tree that truly stands out.
