Seaweed & Poultry Manure Fertiliser organic biostimulant pellets
Seaweed & Poultry Manure Fertiliser organic biostimulant pellets
Two of nature’s most powerful ingredients. One easy-to-use pellet.
SoilWorx Seaweed & Poultry Manure Fertiliser combines the proven feeding power of organic chicken manure with the natural biostimulant properties of seaweed. The result is a unique pellet that doesn’t just feed your plants – it actively strengthens them against drought, frost, heat and other environmental stresses.
With an NPK of 4-3-2 and a rich profile of natural minerals, antioxidants and growth-promoting compounds, this is the product for gardeners who want to give their plants every possible advantage.
Why add seaweed to poultry manure?
Poultry manure is one of the most nutrient-dense organic fertilisers available. Seaweed is one of nature’s most effective biostimulants. By combining the two in a single pellet, SoilWorx has created a product that works on two levels:
Level 1 Nutrition
The poultry manure base delivers a balanced NPK of 4-3-2, providing nitrogen for leaf growth, phosphorus for root development and an higher level of potassium for stronger flowers, better fruit set and improved overall plant resilience.
Level 2 Biostimulation
The seaweed component contains naturally occurring bioactive compounds that go beyond simple feeding:
- Laminarin (oligo and polysaccharides) – promotes beneficial microbial activity in the soil, strengthening the root zone
- Polyphenols (natural antioxidants) — help plants cope with environmental stress including drought, heat and frost
- Trace minerals – a full spectrum of micronutrients that support balanced, healthy growth
This dual action means your plants aren’t just well-fed – they’re better equipped to handle whatever the British weather throws at them.
Key benefits
Stronger Roots
Seaweed extracts are proven to promote root development. Combined with the phosphorus in the poultry manure, this pellet gives plants the foundation they need to establish quickly and access water and nutrients more efficiently.
Better Stress Resistance
The polyphenols and other bioactive compounds in seaweed help plants tolerate abiotic stress — the kind caused by drought, waterlogging, unexpected frost, high temperatures and salty conditions. This is particularly valuable for exposed gardens, coastal plots and areas prone to dry spells.
Improved Yields
Healthier roots and better stress tolerance translate directly into better harvests. Vegetable growers and fruit gardeners will see improved yields and better-quality produce.
Improved Soil Biology
Like all SoilWorx products, these pellets are rich in organic matter that feeds soil microorganisms and earthworms. The seaweed component adds an extra dimension by promoting beneficial microbial colonies in the root zone.
Certified Organic
Organic Trust certified for use in organic growing systems. Safe for vegetable gardens, allotments and anywhere you grow food.
Product specifications
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Detail
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Value
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Total Nitrogen
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3.9 %wt
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P2O5
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3.6 %wt
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K2O
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2.1 %wt
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Pack Sizes
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25kg bag, 10kg bucket
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Certifications
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Organic Trust Certified
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Key Active Compounds
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Laminarin, polyphenols, trace minerals
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Made In
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UK (Newry, Northern Ireland)
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Suitable For
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Vegetables, fruit, flowers, lawns, containers, hanging baskets
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How to use Seaweed & Poultry Manure Pellets
When to apply
pply from March through to September. This product is particularly effective when applied in spring at planting time, giving your crops the biostimulant boost they need during the critical establishment phase.
Application rates
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Use
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Rate
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|---|---|
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General garden use (lawns, borders, established beds)
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100g per square metre
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Fast-growing crops (vegetables, salads, annual flowers)
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200g per square metre
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Trees and shrubs (planting or annual feed)
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300g per square metre
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How to apply
Scatter
Scatter the pellets evenly over the soil surface or into planting holes
Rake
Rake or fork them lightly into the top few centimetres of soil
Water
Water well to activate the slow-release process
Reapply
Reapply every 6-8 weeks during the growing season for continued benefit
Best for: Vegetable gardens, fruit bushes, tomatoes, roses, flowering borders, containers and hanging baskets — anywhere you want strong growth, abundant flowers and maximum harvests.
Seaweed Pellets vs Liquid Seaweed what's the difference?
If you’ve used liquid seaweed fertiliser before, you might be wondering how SoilWorx seaweed pellets compare. Here’s the key difference:
Liquid seaweed
Liquid seaweed is typically a dilute foliar feed or soil drench that provides a quick but short-lived biostimulant effect. It needs to be applied frequently (often weekly) and contains minimal NPK nutrition.
SoilWorx Seaweed & Poultry Manure Pellets
SoilWorx Seaweed & Poultry Manure Pellets combine the biostimulant benefits of seaweed with the sustained nutrition of organic poultry manure in a slow-release pellet. One application feeds and stimulates for 6-8 weeks. You can still use a liquid seaweed as a complementary foliar spray if you wish, but the pellets provide the foundational nutrition and biostimulation your soil and plants need.
Frequently asked questions
What does seaweed fertiliser do for plants?
Seaweed contains naturally occurring bioactive compounds — including laminarin, polyphenols and trace minerals — that act as biostimulants. These compounds promote stronger root development, improve the plant’s ability to handle stress (drought, frost, heat) and encourage beneficial microbial activity in the soil. When combined with poultry manure as in SoilWorx pellets, you get both sustained nutrition and biostimulation in a single product.
Is seaweed fertiliser good for tomatoes?
Seaweed fertiliser is excellent for tomatoes. The higher potassium level (K of 4) supports flowering and fruit set, while the biostimulant compounds help tomato plants cope with the temperature fluctuations common in British greenhouses and gardens. Apply at 200g per square metre when planting out, and top-dress every 6-8 weeks through the growing season.
Can I use seaweed fertiliser pellets on my lawn?
Yes. SoilWorx Seaweed & Poultry Manure Pellets work very well on lawns. The balanced NPK promotes even, healthy growth, while the seaweed biostimulants help your lawn cope with drought and heavy use. Apply at 100g per square metre in spring and again in early summer, watering in well after application.
Are seaweed pellets better than liquid seaweed?
They serve different purposes. SoilWorx seaweed pellets provide slow-release nutrition (NPK 4-2-4) combined with biostimulant benefits over 6-8 weeks. Liquid seaweed is a short-acting foliar feed with minimal NPK. For most gardeners, the pellets offer far better value and convenience as a primary fertiliser. You can use liquid seaweed as a supplementary foliar spray alongside the pellets if you wish.
Is SoilWorx Seaweed & Poultry Manure organic?
Yes. This product is Organic Trust certified, meaning it meets rigorous standards for organic food production. It’s made entirely from natural ingredients — organic poultry manure and seaweed — with no synthetic chemicals, fillers or additives. Safe for use in organic vegetable gardens and allotments.
When is the best time to apply seaweed fertiliser?
Apply from March through September, with the first application timed to coincide with planting or the start of the growing season. Seaweed biostimulants are particularly effective during periods of plant stress — early spring when frost risk remains, during hot dry spells in summer, and when transplanting seedlings outdoors.
About SoilWorx
SoilWorx is produced at the UK and Ireland’s largest organic fertiliser plant in Newry, Northern Ireland, part of a circular economy that transforms agricultural by-products into high-value fertilisers. Find out more about how we make our products.