Fertiliser
All Purpose Fertiliser 4-4-4
True all-purpose 4-4-4 for veg, fruit, flowers and containers.
from £12.00
Customer highlight
A good product in the sense that it’s very easy to apply as it completely dissolves in water. A good price and rapid postage. All I’ve seen is growth!
Editorial highlight from marketplace and store reviews — separate from the full review list below.
Fulvic Acid Powder for Plants: 70% fulvic, 99% soluble natural chelator
Fulvic Acid Powder for Plants is a 70% fulvic acid powder that dissolves in cold water and carries trace nutrients into leaves and roots. Its carboxyl and hydroxyl groups hold iron, zinc, manganese and copper in mobile forms, so a plant can use nutrients that are already in the pot but locked up. Fertiliser is the meal. Fulvic is the fork.
- Unlocks nutrients you've already paid for. Helps plants on alkaline compost or hard tap water take up iron, zinc and manganese.
- Fixes pale new leaves faster. Chelated trace metals move with water into leaf and root.
- Makes your feed work harder. Add it to a liquid feed or foliar spray to improve uptake.
- Clean in the sprayer. 99% cold-water soluble, so it won't brown the tank or block a fine nozzle like raw humate.
- Tiny doses. 0.5 to 1 g per litre, from £6.49.
70% fulvic acid
99% cold-water soluble
Enzymatic process
0.5–1 g per litre
Not an NPK feed
Vegan
Part of our humic and fulvic acid range. New to it? Read What is fulvic acid?
What's in Fulvic Acid Powder for Plants
Fulvic acid (70%)
The small, water-soluble end of the humus family, made by an enzymatic process.
| Spec | This powder | Why it matters |
|---|---|---|
| Fulvic content | 70% by mass | Concentrated active fraction in the jar |
| Solubility | 99% cold water | Clean foliar / fertigation mixes |
| Extraction | Enzymatic, ambient | Gentler than harsh alkaline heat processes |
How to use Fulvic Acid Powder for Plants: rates and mixing
Use rainwater where you can
Hard UK tap water binds calcium and magnesium to fulvic before it reaches the leaf. Prefer rainwater; if you only have hard tap, stand 24 hours or lightly pre-acidify. Mix fresh and use within 24 hours.
Mixing
- Weigh it. Rates are grams per litre. A level teaspoon is roughly 2.5 g, close enough for rough work but not for the narrow dose window.
- Dissolve first. Shake each gram in about 30 ml of warm (not hot) water for 30 to 60 seconds, in a jar, not the sprayer.
- Fill the sprayer or can. Rainwater if you can. If you are feeding at the same time, make up the diluted feed in it first.
- Add the dissolved fulvic last and top up to the full volume for your rate, 0.5 to 1 g per litre. It is a carrier, not a feed.
- Spray or drench the same day. Use within 24 hours.
Starter pack rates
Foliar: 0.5–1 g/L (many crops sit near 0.8 g/L).
Soil drench: 0.5–1 g/L.
Seed sprouting: 80 mg per litre (0.08 g), on kitchen paper kept damp with the solution until the seeds sprout, as in the Zhang 2021 tomato trial. Far weaker than a spray.
Start at the low end. Going past the optimum can reverse the effect.
How far a pack goes
Worked at 0.8 g per litre, the rate the tomato trial favoured, with the full 0.5 to 1 g range alongside.
| Pack | Litres at 0.8 g/L | Litres at 0.5 to 1 g/L | Cost per litre at 0.8 g/L |
|---|---|---|---|
| 60 g | 75 L | 60 to 120 L | about 8.7p |
| 120 g | 150 L | 120 to 240 L | about 5.3p |
| 250 g | about 312 L | 250 to 500 L | about 4.2p |
| 500 g | 625 L | 500 to 1,000 L | about 3.2p |
| 1 kg | 1,250 L | 1,000 to 2,000 L | 2.8p |
Cost per litre worked from October 2026 prices.
Full rates by crop
Crop-by-crop tables, trial citations, hormesis notes and common mistakes: How to apply fulvic acid: rates and method.
Pairs well with
Humic Acid Granules for the soil-side job; or the humic & fulvic pair. Not sure which molecule you need? Humic vs fulvic: which you need.
How Fulvic Acid Powder for Plants works
- Chelation. Carboxyl and hydroxyl groups bind metal cations (iron, zinc, manganese, copper) and boron into mobile complexes that move with water into root and leaf.
- Small enough to stay dissolved. This is the low-molecular fraction, so it stays in solution at working rates.
- More is not better. Fulvic has a narrow dose window: published tomato work often peaks near 0.8 g per litre as a foliar spray, and higher rates reverse the gain.
Hard tap water binds calcium and magnesium to fulvic before it reaches the leaf, so use rainwater where you can. More in How to apply fulvic acid.
Use Fulvic Acid Powder with
- Liquid Micronutrients for Plants: fulvic carries the trace elements Micro-7 supplies.
- Liquid Seaweed Brix+: a common foliar tank-mix for stressed plants.
- Organic All Purpose Fertiliser 4-4-4: the feed fulvic works beside, never instead of.
Which to choose: fulvic is the soluble fraction for sprays. Humic Acid Granules build soil structure and exchange capacity, and the Humic and Fulvic Acid Pair gives you both. See humic vs fulvic acid.
Fulvic Acid Powder for Plants FAQs
Spray or drench at 0.5 to 1 g per litre. Weigh it: a level teaspoon is roughly 2.5 g, too coarse for the narrow dose window.
No. It is a chelator and biostimulant with no meaningful NPK. Use it beside a feed, never instead of one.
Often the nutrients are in the pot but locked up by alkaline compost or hard water. Check watering and pH first; fulvic helps the root take up what is there.
Rainwater is better. Hard tap water binds fulvic before it reaches the leaf. If tap is all you have, mix it fresh and use it within 24 hours.
No. It is a garden product for plants and soil, not approved for human consumption.
Dissolve each gram in about 30 ml of warm water in a jar, add it to the diluted feed or water last, and use within 24 hours.
Often bought with this
Fertiliser
Bloom Fertiliser 2-8-4
Flowering-stage 2-8-4 — more blooms without a jungle of leaves.
from £12.00
