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Tropical Plant Fertilizer

4.7 · 273 reviews

Philodendron, bird of paradise, alocasia and the other leafy tropicals grow in bursts when warmth and light return, and a mixed collection does not need a different bottle for each. Our liquid Tropical Plant Fertilizer supplies the nutrients those plants use for new leaves and roots, indoors through the year or outside for the summer.

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When your tropical plants may benefit from feeding

  • When your tropical houseplant begins pushing larger or more frequent new leaves as daylight increases
  • When your container bird of paradise or philodendron is growing actively and its potting mix needs nutrient replenishment
  • When your tropical plants resume strong growth outdoors after a gradual spring move into suitable warmth
  • When a mature leafy tropical plant has healthy roots but verified low nutrient availability in its long-used potting mix

Yellow leaves, brown edges, and drooping may point to watering, cold stress, or root issues rather than missing nutrients. Don't feed extra simply because a tropical plant has stopped growing in low light.

Results you can see

Feeds foliage for deeper color and a brighter, more lively look.

Feeds foliage for deeper color and a brighter, more lively look.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Supports healthy resilient roots that absorb nutrients more effectively.

Supports healthy resilient roots that absorb nutrients more effectively.

Works for all tropical plant varieties

  • Monstera
  • Fiddle Leaf Fig
  • Bird of Paradise
  • Philodendron

How to use

  1. Watering can

    1 tsp per quart (32 oz) of water

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

  2. Leaf misting (optional)

    ½ tsp per pint (16 oz) of water

    Every 1–2 weeks

What's inside
The 3-1-2 ratio (3% nitrogen, 1% phosphate, 2% potash) is weighted for foliage. Tropical plants are grown for their leaves, and this ratio mirrors what fast-growing foliage plants actually consume — nitrogen-forward for continuous leaf production, without the excess phosphorus most potting mixes never use. Over two-thirds of the nitrogen is nitrate nitrogen, the form roots absorb directly, which means faster response and lower burn risk than cheap ammonium-heavy formulas.

Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium (1%), magnesium (0.5%), iron, manganese, zinc, boron, and copper — the micronutrients that keep leaves large, deep green, and evenly colored rather than pale, small, and slow, which is where potted tropicals decline first once their mix is spent.

Frequently asked questions

How often should I feed my tropical plants?

Tropical Plant Fertilizer is built for consistent light feeding, which is how fast-growing tropicals use nutrients: heavily, but steadily. Mix 1 teaspoon per quart of water and feed every 1–2 weeks through spring and summer while your tropical plants are actively growing, then every 4 weeks in fall and winter when growth slows. Mixing it into your regular watering keeps nitrogen arriving for each new leaf without the buildup that comes from infrequent heavy doses. Potted tropicals depend entirely on what you feed once their mix is spent.

Which plants count as tropical for this fertilizer?

Most common foliage houseplants qualify: monstera, philodendron, pothos, alocasia, calathea, banana, bird of paradise and dracaena, along with mixed jungle collections indoors or outdoors in warm, humid zones. They share the same nitrogen-forward, fast-growing needs that Tropical Plant Fertilizer’s 3-1-2 ratio is built around. Plants with specialized needs, such as orchids, succulents and carnivorous plants, want a different balance, and TPS makes dedicated formulas for them.

How do I get bigger leaves?

Leaf size comes down to steady nitrogen, consistent moisture and enough light. Tropical Plant Fertilizer covers the first: its 3-1-2 ratio runs nitrogen ahead of phosphorus and potassium for continuous leaf production, with calcium, magnesium and iron keeping the leaves large, deep green and evenly colored. Pair regular feeding with bright indirect light and soil that stays lightly moist rather than swinging between soaked and bone dry. Each new leaf should then come in larger than the last, since your tropical plant isn’t held back by a shortage.

Will this burn my plants?

Tropical Plant Fertilizer is a dilute liquid feed, and dilution is what matters here. Fertilizer burn happens when concentrated salts sit against the roots: too much product in too little water. Mixed at 1 teaspoon per quart and applied every 1–2 weeks through the growing season, the 3-1-2 formula arrives in solution at a strength the roots take up as they water. Over two-thirds of the nitrogen is nitrate, the form roots absorb directly. For recently repotted or newly acquired plants, start at half strength for the first two feedings.

When will I see results?

New growth typically comes in greener within the first couple of weeks of regular feeding, as the nitrate nitrogen and iron in Tropical Plant Fertilizer reach your tropical plant quickly. Leaf size improves over the season as your plant keeps pushing new growth on a steady nitrogen supply. Plants that have been in the same pot for more than a year tend to show the most noticeable turnaround, because their mix has run out of the nutrients the formula replaces. Pale, small leaves already on your plant won’t change; the new ones will.

Let's Start Growing!

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What's inside your bottle — macronutrients (N-P-K), core minerals, micronutrients, and natural kelp
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Tropical Plant Fertilizer 8oz $11.99