Liquid Plant Food
Feed herbs, greens, vegetables, houseplants, and hydroponic systems with one versatile liquid plant food. It provides broad nutrition for healthy growth across edible and ornamental plants without requiring a different product for every container or garden bed.
Mix it into water as directed for simple, consistent feeding across indoor, outdoor, and hydroponic growing.
Why You'll Love It
- Steady Growth Potassium-forward nutrition for herbs and greens in countertop hydroponic systems.
- Fruit Development Feeds tomatoes and peppers through flowering so they set fruit, not just leaves.
- Complete Nutrition Carries its own calcium and magnesium, so no separate Cal-Mag bottle is needed.
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.
All-purpose liquid plant food with a potassium-forward 4-3-6 NPK plus calcium, magnesium, and micronutrients. Feeds herbs, greens, vegetables, houseplants, and hydroponic systems through regular watering.
How to Use Liquid Plant Food
| Method | Amount | How Often |
|---|---|---|
| Simplified (soil or hydro) | 5 mL (1 tsp) per quart of feedwater | Every 1–2 weeks |
| Hydroponic — 2–3 pod models | 5 mL (1 tsp) | At start, then every 2 weeks |
| Hydroponic — 6–7 pod models | 10 mL (2 tsp) | At start, then every 2 weeks |
| Hydroponic — 9–12 pod models | 15 mL (3 tsp) | At start, then every 2 weeks |
Shake well before using. Target a pH of 5.0–6.0 for best growth, and be careful not to overfeed.
What's Inside
The 4-3-6 ratio (4% nitrogen, 3% phosphate, 6% potash) is potassium-forward — built for edible plants that need to fruit and produce, not just push leaves. The nitrogen is a mix of nitrate and ammoniacal forms plus urea, giving both fast uptake and a longer feeding curve.
Beyond NPK: sea kelp (Ascophyllum nodosum), plus calcium (1%), magnesium (0.5%), sulfur, boron, copper, iron, manganese, and zinc. The Cal-Mag is already in the bottle, so countertop hydro growers don't need to buy and dose it separately.
Made For
All edible plants — lettuce and greens, herbs, tomatoes, peppers, and more — in countertop hydroponic systems, aero gardens, containers, or garden beds.
Problems It Solves
- Pale, slow lettuce and greens in countertop hydro systems
- Leggy herbs that never fill out
- Tomatoes and peppers that flower but set little fruit
- Needing a separate Cal-Mag supplement for hydro growing
FAQs
How much do I use in my AeroGarden or countertop system?
It depends on pod count: 5 mL for 2–3 pod models, 10 mL for 6–7 pods, 15 mL for 9–12 pods. Add at the start and again every two weeks.
Do I need a separate Cal-Mag?
No. Calcium and magnesium are already included, along with the full micronutrient package, so this works as a standalone feed.
Can I use it in soil, or is it hydro only?
Both. For soil and containers, use the simplified rate — 5 mL (1 tsp) per quart of water every 1–2 weeks.
Is it safe for food crops?
Yes, it's formulated specifically for edible plants. Follow the labeled rates and avoid overfeeding.
What pH should I run?
5.0–6.0 is the target range for best nutrient uptake, particularly in hydroponic systems.