Bougainvillea care guide: when & how to prune, fertilize and spray
Bougainvillea spp. · USDA zones 9–11
Thorny, vigorous tropical vine with brilliant papery bracts. It blooms on new growth and flowers best when slightly stressed: lots of sun, and a bit dry.
☀️ Sun
Full sun.
💧 Water
Water deeply, then let it dry out. Overwatering stops flowering.
🪱 Soil
pH 5.5–6.5. Well-drained. Light feeding. Too much nitrogen means leaves, no color.
How and when to prune bougainvillea
Main prune
When: from 2 weeks before to 2 weeks after the last spring frost.
- zones 8–10: about Feb 11 – Mar 11
Bougainvillea flowers on new growth, so pruning before the main growing season produces masses of color.
- Remove dead, crossing and wayward stems.
- Cut back the remaining stems by up to a third to shape it. Wear thick gloves.
Tip-prune after each bloom cycle
When: 10–12 weeks after the last spring frost, then every 8 weeks (2 times a season).
- zones 8–10: about May 6–20
Pinching soft tips after a flush of color triggers the next bloom cycle.
- Snip back new growth by a few inches after the bracts fade.
Fertilizing bougainvillea
Feeding
When: 2–4 weeks after the last spring frost, then every 8 weeks (3 times a season).
- zones 8–10: about Mar 11–25
A bloom-formula fertilizer supports continuous color.
- Apply a balanced or bloom fertilizer at half strength.
What to use: 🌿 Balanced organic granular fertilizer (e.g. Espoma Plant-tone 5-3-3) · Water-soluble bloom booster (e.g. Miracle-Gro Bloom Booster 15-30-15)
Common bougainvillea problems and how to fix them
No blooms
Signs: Green growth only.
What to do: Needs more sun, less water and less nitrogen.
Bougainvillea care FAQ
When should I prune bougainvillea?
Main prune: from 2 weeks before to 2 weeks after the last spring frost (around Feb 11 – Mar 11 in zones 8–10). Tip-prune after each bloom cycle: 10–12 weeks after the last spring frost (around May 6–20 in zones 8–10). Thorny, vigorous tropical vine with brilliant papery bracts. It blooms on new growth and flowers best when slightly stressed: lots of sun, and a bit dry.
What is the best fertilizer for bougainvillea?
A bloom-formula fertilizer supports continuous color. Good options: Water-soluble bloom booster (e.g. Miracle-Gro Bloom Booster 15-30-15); Balanced organic granular fertilizer (e.g. Espoma Plant-tone 5-3-3).
What soil does bougainvillea need?
Well-drained. Preferred pH 5.5–6.5. Light feeding. Too much nitrogen means leaves, no color.
How much sun and water does bougainvillea need?
Sun: Full sun. Water: Water deeply, then let it dry out. Overwatering stops flowering.
What are common bougainvillea problems?
No blooms: Green growth only. Needs more sun, less water and less nitrogen.
More tropicals care guides
Timings are given relative to your average frost dates, with examples for typical US climates. Always read and follow product labels.