The Full Range
71 products
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Granular
Kieserite
25% MgO · Organic Magnesium Fertiliser
From £10.49 £6.99/kg5 sizes · down to £2.97/kg
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Kieserite
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Liquid
Organic Phosphorus Fertiliser
Liquid 8% P₂O₅
From £13.99 £27.98/litre2 sizes · down to £21.99/litre
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Organic Phosphorus Fertiliser
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Granular
Granulated Gypsum
Clay Breaker · 40% SO3
From £10.49 £6.99/kg5 sizes · down to £2.97/kg
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Granulated Gypsum
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Liquid
Organic Liquid Nitrogen Fertiliser 10% N
Amino Acid Feed
From £13.99 £27.98/litre2 sizes · down to £21.99/litre
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Organic Liquid Nitrogen Fertiliser 10% N
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Liquid
Liquid Tomato Feed 3-2-6
High Potash · Made with Organic Ingredients
From £12.99 £25.98/litre2 sizes · down to £21.99/litre
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Liquid Tomato Feed 3-2-6
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Powder
Organic Bloom Booster 2-10-5
Soluble Powder
From £7.99 £31.96/kg3 sizes · down to £17.16/kg
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Organic Bloom Booster 2-10-5
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Powder
Organic All-Purpose Booster 5-5-5
Soluble Powder
From £9.49 £37.96/kg3 sizes · down to £22.83/kg
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Organic All-Purpose Booster 5-5-5
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Waterlogged Lawn Kit
Puddles then Bakes
From £29.95£33.993 sizes
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Waterlogged Lawn Kit
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Autumn Lawn Feed for Clay
With Gypsum
From £28.95£32.983 sizes
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Autumn Lawn Feed for Clay
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Humic, Fulvic, Seaweed & Amino Set
Foliar Feed
From £41.95£47.463 sizes
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Humic, Fulvic, Seaweed & Amino Set
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Tomato Feed & Veg Feed Pair
3-4-6 + 4-5-6
From £20.50£23.003 sizes
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Tomato Feed & Veg Feed Pair
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Tomato Plant Food Trio
3-4-6 · 3-3.5-7 · 3-2-7
From £30.50£34.503 sizes
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Tomato Plant Food Trio
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Seaweed Fertiliser
Humic & Fulvic Trio
From £29.95£33.973 sizes
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Seaweed Fertiliser
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Humic & Fulvic Acid Pair
Granules + Powder · 70%
From £18.75£20.983 sizes
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Humic & Fulvic Acid Pair
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All Purpose, Bloom & Mineral Mix Trio
From £31.95£35.993 sizes
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All Purpose, Bloom & Mineral Mix Trio
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All Purpose & Bloom Feed Pair
4-4-4 + 2-8-4
From £21.50£24.003 sizes
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All Purpose & Bloom Feed Pair
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Liquid Gypsum & Wetting Agent Pair
Clay Drainage
From £24.29£26.993 sizes
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Liquid Gypsum & Wetting Agent Pair
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Tomato Feed & Cal-Mag Pair
Marked Fruit
From £19.79£21.993 sizes
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Tomato Feed & Cal-Mag Pair
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Liquid
Liquid Fertiliser 5-2-5
Balanced Organic
From £12.99 £25.98/litre2 sizes · down to £21.99/litre
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Liquid Fertiliser 5-2-5
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Granular
Boron Humate Granules
3.23% Boron · Slow-Release
From £16.09 £32.18/kg3 sizes · down to £22.99/kg
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Boron Humate Granules
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Liquid
Liquid Lawn Feed
Organic 7-2-3
From £13.99 £27.98/litre2 sizes · down to £21.99/litre
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Liquid Lawn Feed
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Granular
Soil Acidifier
90% Sulphur Pastilles
From £12.00 £8.00/kg4 sizes · down to £4.40/kg
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Soil Acidifier
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The full range, in one place
Every Dr Forest fertiliser, soil conditioner, biostimulant and single mineral on one page — named ingredients, blended in Stockport. If you already know the bag you want, scroll the grid. If you do not, start with what you grow, how you feed, or the soil itself.
The full catalogue, from finished crop blends to single minerals. If you know what you are looking for, this is the fastest way to find it. If you do not, the routes below will get you there quicker than scrolling.
It covers both halves of the catalogue: the finished blends, and the raw plant nutrients the blends are built from. If you came to buy plant nutrients individually rather than a bag with everything already in it, the single minerals, the liquids and the biostimulants are all listed here too — natural plant feed and mineral inputs, sold alongside the blends rather than on a separate site.
Start with what you grow
- Tomatoes, chillies and peppers, tomato feed, the chilli and pepper blend, and a liquid feed for pots.
- Vegetables and allotment, the two bags most plots run on, the potato blend, and the single nutrients.
- Fruit trees and soft fruit — strawberry feed, potash, magnesium and planting minerals (see Organic Fertilisers and the crop pages linked above).
- Hydrangeas and ericaceous plants, sulphur, magnesium and a shrub feed for acid-lovers.
- Roses and flowers, built on calcium and potassium in balance for repeat flowering.
- Lawn care, high-nitrogen grass feed plus the supporting cast for compacted or stressed grass, and the autumn and winter lawn feeds.
- Blossom end rot, the calcium feeds that correct it and the ones that prevent it.
Or start with how you feed
- Organic fertilisers, the blends and the single ingredients behind them.
- By nutrient: nitrogen, potash and potassium, phosphorus — compared inside Organic Fertilisers.
- Bundles and kits, built from what customers buy together.
- Liquid feeds, for when a plant needs help in days rather than weeks.
- Biostimulants, which help the plant use the nutrition already there.
- Seaweed, as kelp meal, soluble powder and liquid extract.
- Humic and fulvic acid, the carbon side of soil chemistry.
- Vegan fertiliser, plant and mineral inputs only.
Or start with the soil
- Soil improvers: rock dust, clay minerals and calcium, for structure and mineral reserves.
- Clay soil, gypsum, rock dust and a wetting agent for heavy ground.
- Microbial inoculants, mycorrhizal fungi and effective microorganisms.
- EM and bokashi, for turning kitchen waste into soil food.
- Plant soaps and wetting agents, which make everything else spread and soak in properly.
Fertiliser for sale, direct from the people who blend it
Everything listed here is our own. We are the manufacturer rather than a reseller: the fertiliser for sale on this page is packed in Stockport in batches small enough that each one carries its own analysis. There is no white-labelled drum with a sticker on it, and no ingredient hiding behind the words "organic base".
Most of the organic fertiliser suppliers selling into UK gardens are distributors, which matters for two reasons. Price, because there is one margin in the chain rather than three. And traceability, because we can tell you what went into a bag and where it came from. It is also why the plant nutrients for sale here are the same materials that go into the blends, not a cheaper parallel line.
Organic nutrients UK: sizes, delivery and where else we sell
Free UK delivery on orders over £40. Most blends come in more than one size, and sizes, prices and application rates are on every product page — as a rough guide, a 1.5kg bag of a crop blend covers a season for a small greenhouse or a raised bed, while soil conditioners and single minerals come in larger packs because the quantities involved are larger. A selection of the range is also sold on Amazon UK and eBay UK, so if you would rather order through an account you already have, that is a reasonable way to do it. The full catalogue is only here.
Organic plant supplements: a note on the phrase
Some people search for organic plant supplements, and it is worth being exact about what that means on this site. Everything here is plant nutrition: fertilisers, soil conditioners, minerals, microbial inoculants and biostimulants, applied to soil or to leaves. None of it is a food supplement, none of it is intended for human or animal consumption, and nothing here is sold with a health claim attached. Seaweed, humic and fulvic materials are sold in supplement form elsewhere on the internet; ours are garden inputs, packed and labelled as garden inputs.
Not sure where to begin?
Most people start with one of three things: a crop blend for whatever they care most about growing, an All Purpose 4-4-4 for a whole garden, or a soil conditioner if the ground is the problem rather than the feeding. The guides cover the reasoning behind each, and why organic makes the case for the whole approach.
What runs through the whole range
Every ingredient named on the label. Slow release rather than soluble spikes. Packed in small batches in Stockport, with compostable packaging on the granular blends. Free UK delivery over £40.
Common questions
Where can I buy Dr Forest fertiliser?
Direct from this site, which carries the full catalogue, and a selection of the range on Amazon UK and eBay UK. Buying here is the only way to reach the whole 76-product range, including the single minerals and the larger pack sizes.
What sizes do the bags and bottles come in?
It varies by product, and every size is listed with its price on the product page. As a rough guide, a 1.5kg bag of a crop blend covers a season for a small greenhouse or a raised bed. Rates for each product are published on its own page.
Do you deliver across the UK?
Yes, and delivery is free on orders over £40.
Are these safe around children, pets and wildlife?
Yes. Organic ingredients throughout, with no synthetic chemicals and no plant protection products in anything listed on this page.
I do not know what my soil is short of. Where do I start?
With a blend rather than a single mineral. Blends are forgiving; single minerals assume you already know what is missing. If the ground itself is the problem rather than the feeding, start with a soil conditioner instead.