Liquid Plant Food
Liquid plant food built for edible gardens — herbs, greens, tomatoes, peppers — in soil or hydro. The 4-3-6 NPK runs potassium-forward to support fruiting and steady growth, with calcium, magnesium, and a full micronutrient package included so you don't need a separate Cal-Mag supplement. Works in AeroGarden-style countertop systems and in-ground beds alike.
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.