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Bougainvillea Fertilizer

Bougainvillea is the one plant in the range whose label asks you to let the soil go fully dry between waterings, not just mostly — it flowers hardest when it is not too comfortable. The feed is a 3-3.6-5.1: nitrogen is the smallest of the three numbers, with phosphate and potash above it. Calcium (2.1%) and magnesium (0.75%) come with it, plus 0.08% sulfur and a light micronutrient package, and a little seaweed.

2 Tbs (30 mL) per gallon in a watering can, or the 1 oz (30 mL) setting on a hose-end sprayer. Every 1–2 weeks in spring and summer, then every 2–4 weeks in fall and winter — a wider winter gap than most of the range. Direct, bright light is what the label asks for.

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Works for all bougainvillea varieties

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

Results you can see

Vibrant blooms vibrant blooms

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

New Growth new growth

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

Strong Roots strong roots

Strong healthy root development for effective water and nutrient uptake.

How to use

  1. Watering can

    2 Tbs (30 mL) per gallon of water

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

  2. Hose end sprayer

    Set dial to 1 oz (30 mL) setting

    Spring & summer: every 1–2 weeks

  3. Leaf misting (optional)

    1 tsp per quart (32 oz) of water

    Every 1–2 weeks

Frequently asked questions

When should I feed my bougainvillea?

Every 1–2 weeks through spring and summer, then every 2–4 weeks in fall and winter. That winter gap is wider than most of the range gives — don’t carry a four-weekly habit over from another plant.

Is this slow-release or fast-acting?

Neither, in the granular sense. It’s a liquid concentrate you dilute and pour or spray on, so the nutrients reach the soil already dissolved rather than breaking down over months. That’s why the label has you feed on a repeating schedule instead of once a season.

What NPK does bougainvillea want?

This one is 3-3.6-5.1 — nitrogen is the smallest of the three, with 3.6% phosphate and 5.1% potash above it. If you have read that bougainvillea wants less nitrogen and more phosphorus, that is the shape of this analysis, and the numbers are there to check rather than take on trust.

How much do I mix?

2 Tbs (30 mL) per gallon of water in a watering can, or a hose-end sprayer on the 1 oz (30 mL) setting for a larger plant. If you’d rather mist the leaves, the label gives 1 tsp per quart (32 oz).

Does this work for potted bougainvillea?

Yes — same mix, same schedule. The label’s watering note is the one to pay attention to in a pot: moderate watering, with the soil allowed to go fully dry between waterings, under direct bright light.

Will this burn my plant?

The label doesn’t make a claim either way. What it gives you is one rate — 2 Tbs (30 mL) per gallon, or the 1 oz setting on a hose-end sprayer — and a schedule to go with it. Stay on both, and measure rather than eyeball.

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Bougainvillea Fertilizer $11.99