Bougainvillea Fertilizer for Bold Bracts & Blooms

When your bougainvillea may benefit from feeding

When your bougainvillea resumes vigorous leaf and stem growth after cooler weather, if supplemental nutrients are needed
As a container-grown bougainvillea grows rapidly through warm months and repeated watering reduces potting-mix nutrients
When your established bougainvillea is developing new flowering shoots in strong sun and its root-zone nutrition is insufficient
If your bougainvillea's soil test shows a nutrient shortage during active growth rather than a problem caused by shade or wet roots

If your bougainvillea has lots of leaves but little color, check sunlight and avoid excessive nitrogen or watering before adding more fertilizer.

Results you can see

Supports colorful bracts and healthy foliage for a vibrant, beautiful bougainvillea.

Supports fresh leaf and vine growth for a fuller, healthy-looking plant.

Strong healthy root development for effective water and nutrient uptake.

Works for all bougainvillea varieties

Barbara Karst Bougainvillea
California Gold Bougainvillea
Miami Pink Bougainvillea
Rosenka Bougainvillea
Bougainvillea

How to use

Watering can

2 Tbs (30 mL) per gallon of water

Spring & summer: every 1–2 weeks · Fall & winter: every 2–4 weeks
Hose end sprayer

Set dial to 1 oz (30 mL) setting

Spring & summer: every 1–2 weeks
Leaf misting (optional)

1 tsp per quart (32 oz) of water

Every 1–2 weeks

What's inside

The 3-3.6-5.1 ratio is built around the reason bougainvillea underperform: too much nitrogen. Phosphorus at 3.6% and potassium at 5.1% both outweigh nitrogen at 3%, which shifts your bougainvillea's energy toward bract production rather than vine and leaf growth. All of the nitrogen is nitrate nitrogen, the form roots absorb directly, so response is fast and burn risk stays low in the lean, fast-draining soil bougainvillea prefer.

Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium at 2.1% — unusually high, and what builds sturdy canes and holds bracts longer — magnesium (0.75%), iron, manganese, zinc, boron, and copper. Iron matters especially in alkaline soil and hard-water regions, where bougainvillea leaves yellow between the veins while the veins stay green.

How to care for bougainvillea

Light

Give bougainvillea abundant direct sun. Strong light is one of the most important factors for a colorful bloom display, while shaded plants often make more foliage and fewer bracts. Fertilizer works best as support for a plant already receiving enough light.

Water

Water thoroughly, then allow the soil to dry somewhat before watering again rather than keeping it constantly wet. Established bougainvillea generally performs better with good drainage and a clear wet-dry cycle than with permanently saturated roots.

Soil

Use a fast-draining soil or potting mix. Bougainvillea does not like a heavy, waterlogged root zone, and poor drainage can limit growth regardless of how much fertilizer is applied. Containers should have unrestricted drainage holes.

Feeding

Feed Bougainvillea Fertilizer through the warm months of active growth, every one to two weeks in spring and summer and every two to four weeks in fall and winter, at 2 tablespoons per gallon of water. The goal is balanced nutrition for stems, foliage, roots, and flowering growth. Avoid heavy nitrogen feeding, which encourages leaves at the expense of color.

Pruning

Prune or pinch after a flowering flush to manage size and encourage branching. Bougainvillea flowers on new growth, so thoughtful shaping can help create more growing tips over time. Wear gloves and handle thorny stems carefully.

Color & blooms

For the strongest display, combine full sun, good drainage, sensible watering, and appropriate nutrition. Our fertilizer supports the new growth that carries colorful bracts, but shade or excessive nitrogen can still leave your bougainvillea leafy with fewer blooms.

Frequently asked questions

How can I get my bougainvillea to produce more color and blooms?

Nutrition supports the growth needed for flowering, but sunlight is one of the biggest factors in bougainvillea performance. Feed appropriately during active growth, provide plenty of direct sun, and avoid trying to force flowers with excessive fertilizer.

How do I fix a bougainvillea that's growing lots of leaves but barely blooming?

A very leafy bougainvillea may be receiving too much nitrogen, too little sunlight, or more water than it needs. Adding more fertilizer usually isn't the solution. Make sure your bougainvillea has strong light and avoid excessive feeding that encourages foliage at the expense of flowering.

When should I fertilize bougainvillea?

Focus feeding during warm periods of active growth, when your bougainvillea is producing new stems, leaves, and flowering growth. Reduce feeding when temperatures fall and your plant's growth significantly slows.

Should I fertilize my bougainvillea while it's flowering?

It can continue receiving appropriate nutrition during active growth and flowering, but heavy feeding isn't necessary simply because flowers are present. Follow the recommended application schedule rather than increasing fertilizer to try to extend the bloom.

How do I fertilize a potted bougainvillea without overfeeding it?

Good drainage and an appropriate fertilizer rate are especially important in containers. Because fertilizer salts can accumulate in a limited volume of soil, moderate feeding is better than frequent heavy applications.

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