House Plant Food
Give houseplants regular nutrition as the nutrients in potting soil are used up over time. This liquid plant food supports greener foliage, steady new growth, and healthy indoor plants across a wide range of common varieties.
Mix it into your normal watering routine as directed for an easy feeding habit that fits everyday houseplant care.
Why You'll Love It
- Healthy Foliage Kelp and micronutrients aimed at greener foliage on indoor plants.
- Steady Growth Regular feeding keeps new leaves coming on indoor plants.
- Healthier Soil Replaces what potting mix runs out of between repottings.
Made by growers
More than a bottle on a shelf.
- Talk to real plant people. The team that mixes the formula answers your email.
- Made in-house, in the USA. Every bottle mixed and filled by us, not a third party.
- We're growers, not resellers. We use this on our own plants before it ships.
- Bundle savings only here. Pair any two TPS formulas — your order ships free.
House plant food with kelp and micronutrients for healthy indoor growth. Regular feeding supports greener foliage, steady new leaves, and the nutrients potting soil loses over time.
How to Use House Plant Food
| Method | Amount | How Often |
|---|---|---|
| Watering can (spring & summer) | 1 tsp per quart (32 oz) of water | Apply every 1-2 weeks |
| Watering can (fall & winter) | Same dilution | Apply every 4 weeks |
| Leaf misting (optional) | 1/2 tsp per pint (16 oz) of water | Spray on leaves every 1-2 weeks |
Mix into your normal watering — no separate feeding routine needed. One dilution works for the whole collection, so you can feed everything from the same watering can.
What's Inside
A 3-1-2 ratio built around how houseplants live: grown for leaves, in pots, in less light than they'd get in nature. Nitrogen leads at 3%, with 2.2% as nitrate nitrogen — the form roots absorb directly, fast-acting with low burn risk — because foliage is what nearly every houseplant is producing and what container soil runs out of first. Phosphate stays low at 1% since most houseplants rarely flower indoors, and 2% potash keeps stems sturdy and helps plants regulate water through the dry-out cycles between waterings.
Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus 1% calcium and 0.5% magnesium, with iron, manganese, zinc, copper, boron, and sulfur. Iron and magnesium are the two houseplants run short of first — both sit at the center of chlorophyll production, so the shortage reads as pale new leaves or older ones yellowing between the veins while the plant otherwise carries on.
Made For
The whole houseplant collection — pothos, philodendron, monstera, snake plants, ZZ plants, peace lilies, dracaena, palms, ferns, spider plants, and mixed shelves of everything at once — in apartments, offices, and any indoor spot with moderate light.
Problems It Solves
- Pale or yellowing leaves across several plants at once
- Houseplants that haven't pushed new growth in months
- Plants that thrived after purchase and then slowly stalled
- A big collection that needs one feed instead of five specialty bottles
FAQs
How often should I feed houseplants?
Add 1 tsp per quart (32 oz) of water and apply every 1-2 weeks in spring and summer, dropping to every 4 weeks in fall and winter when growth slows. You can optionally mist leaves with 1/2 tsp per pint (16 oz) every 1-2 weeks. One dilution covers the whole collection — mix a can and water everything on your normal rounds.
Can I really use one fertilizer on all my houseplants?
For the large majority, yes — pothos, philodendron, monstera, palms, dracaena, snake plants, and peace lilies are all foliage plants with the same basic appetite, which is what the 3-1-2 ratio serves. The gentle concentration means light feeders like ZZ and snake plants tolerate it too. The exceptions are specialists: orchids, succulents in lean mixes, and carnivorous plants do better on formulas built for them.
Why are my houseplant's leaves turning yellow?
Check watering first — constantly wet soil suffocates roots and yellows leaves from the bottom up, and no fertilizer fixes that. If watering is right and the plant has been in the same pot over a year, depleted soil is the likely cause: older leaves yellowing between the veins points to magnesium, pale new growth points to iron. This formula supplies both alongside the nitrogen.
Should I fertilize in winter?
Lightly, yes — the label drops to every 4 weeks rather than stopping. Most houseplants slow down in winter's lower light but don't go fully dormant the way outdoor plants do, so a reduced schedule keeps them maintained without pushing growth the light can't support. If a plant is fully resting — no new growth at all — it's fine to skip until you see it wake in late winter.
Can fertilizer burn my houseplants?
Overconcentration can burn any plant — browning leaf tips and edges are the classic sign — which is why this formula runs a gentle 3-1-2 with most nitrogen in low-burn nitrate form. Follow the 1 tsp per quart dilution and you have wide margin across the collection. If you've overfed in the past, flush the pot with plain water until it drains freely, then resume at the label rate.
When will I see results?
Nitrate nitrogen is absorbed directly by the roots, so it starts working with the first watering. Expect richer green color within 1-2 weeks and new growth — fresh leaves, new vines — within 3-5 weeks of regular feeding in the growing season. Fast growers like pothos and philodendron respond first; slow ones like snake plants and ZZ show it over a couple of months.
Related Products
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