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Indoor Plant Food

Indoor Plant Food is a liquid fertilizer made for houseplants — pothos, philodendron, ferns, ZZ plants, spider plants and the rest of a mixed collection. It is a 3-1-2, higher in nitrogen, for plants whose growth is mostly leaf. One bottle covers the whole shelf at one mix.

Mix it into a quart of water and use it in place of a regular watering. Feed every week or two in spring and summer, about monthly in fall and winter.

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“I've noticed a difference in my plants' growth and it's easy to mix and use.”

Dorothy D. · Verified buyer

Works for a mixed houseplant collection

  • pothos
  • philodendron
  • monstera
  • boston fern
  • ZZ plant
  • spider plant
  • peace lily
  • dracaena

Signs your plant needs this

  • Leaves turning pale and washed out across a whole collection
  • New growth coming in smaller than the older leaves
  • Plants that have not put out a new leaf in months
  • Long bare stems with leaves spaced further apart than before

Results you can see

Vibrant Leaves vibrant leaves

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

New Growth new growth

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

Strong Roots strong roots

Supports healthy resilient roots that absorb nutrients more effectively.

What's inside your bottle — macronutrients (N-P-K), core minerals, micronutrients, and natural kelp

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

Frequently asked questions

How often should I feed my houseplants?

Indoor Plant Food is built for steady, light feeding rather than occasional heavy doses. Its 3-1-2 formula leans toward nitrogen, the nutrient houseplants use most for new leaves, balanced with calcium, magnesium and iron so growth stays green and even. Feed every week or two in spring and summer while your plants are actively growing, and about once a month in fall and winter when they slow down, at 1 teaspoon per quart of water.

Is this slow-release or fast-acting?

Fast-acting. It’s a liquid, so the nitrogen, phosphorus and potassium are already dissolved when you water and the roots can take them up straight away. That matters for houseplants in pots, where a small volume of soil holds little in reserve. A slow-release stick or granule drip-feeds over months and can’t be adjusted; this gives you a measured dose each time, in step with how much the plant is growing.

Can I use it on all my houseplants?

Yes. Indoor Plant Food is a general houseplant formula: a 3-1-2 ratio with calcium, magnesium and a full set of micronutrients, which covers foliage plants across the board. Pothos, philodendron, ferns, ZZ plants, dracaena and the rest of your collection can share one bottle at the same 1 teaspoon per quart. For plants with a specialist need, such as an orchid in bark, we make dedicated formulas.

How much do I mix?

1 teaspoon per quart of water, or 4 teaspoons if you mix a full gallon. The formula is dosed gently on purpose: at that strength you can feed on a regular schedule, and every feeding carries a modest amount of nutrition rather than a heavy hit. Mix a batch and water your plants with it as you normally would.

Does pot size change how much I use?

No. You mix it the same for every plant, 1 teaspoon per quart, because the strength of the solution is what the roots respond to, not the total volume. A larger plant in a larger pot simply drinks more of the mixed water when you give it a normal watering, so its dose scales up on its own. Making the solution stronger for big pots only leaves excess salts in the soil.

Will this burn my plants?

Indoor Plant Food 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, or granules piled at the base of a plant. Mixed at 1 teaspoon per quart and applied every week or two in season, the nutrients arrive in solution at a strength the roots take up as they water. Keep to that mix and water it in as part of a normal watering. If you miss a feeding, pick the schedule back up at the normal rate.

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Indoor Plant Food $11.99