Alga Sol Seaweed Fertilizer
Liquid Seaweed Extract · Plant Biostimulant · Ascophyllum Nodosum · Cold-Press
Not a replacement for NPK fertilizer — a biostimulant used alongside your regular feeding programme.
Not satisfied? Full refund, no questions asked. Trade and bulk orders — contact us to discuss.
Beyond Standard Seaweed Fertilizer
Many growers look for a seaweed fertilizer expecting an NPK boost. The true value of Ascophyllum nodosum lies elsewhere — as a plant biostimulant. While traditional fertilizers feed the plant, Alga-Sol stimulates the plant's own biological processes. Developed by a team of leading scientists after a six-year study, and manufactured via cold-press Cell Harvest Technology at our Glasgow facility, it preserves the delicate bioactive compounds that mass-market products destroy in extraction.
Potatoes, cereals, oilseed rape, sugar beet
Professional sports grounds & grassland
Vegetables, tomatoes, fruit & hydroponics
Root dips, propagation & establishment
Is Alga-Sol Right for Your Situation?
Review this table before ordering, particularly for commercial or sensitive crops.
| Crop / Use Case | ✓ Proven | ⚠ Combine with | ✗ Not suitable | Notes |
|---|---|---|---|---|
| Potatoes | ✓ | Trial data: +21.2% yield. Safe for seed potato coating. Prevents scab risk — alkaline extracts cannot claim this. | ||
| Wheat & barley | ✓ | Trial data: +15.2% average yield increase. Compatible with pre-emergence herbicides. | ||
| Sugar beet | ✓ | Trial data: +30.0% yield uplift. Prevents mid-summer bolting when applied at 4-leaf stage. | ||
| Sports turf & grassland | ✓ | Stimulates tillering and chlorophyll production. Used by 60% of UK Premier League grounds. | ||
| Oilseed rape | ✓ | Spring and autumn applications. Builds winter resilience of root system. | ||
| Tomatoes & vegetables | ✓ | 1:200 foliar every 14 days. Trial data: +38.3% improvement in sugar-acid ratio (Brix). | ||
| Transplanting / root dips | ✓ | 1:200 dilution — significantly reduces transplant shock. Suitable for all species. | ||
| Hydroponics | ✓ | Fully soluble. Integrates directly into irrigation lines at recommended rates. | ||
| Use as standalone NPK feed | ⚠ | Alga-Sol is a biostimulant, not a macronutrient fertilizer. Always use alongside your regular NPK programme. | ||
| Heavy clay soils with poor drainage | ⚠ | The alginic acid benefits soil structure over time but will not fix fundamental drainage problems. | ||
| Aerial spray in windy conditions | ✗ | Risk of drift. Apply at low wind speed via ground application or irrigation for precision and effectiveness. |
How Much Alga-Sol Do I Need?
Application rates depend on crop type and growth stage. Professional rates are given in litres per hectare (L/ha). Home garden use is based on dilution ratio.
Commercial Agriculture — L/ha| Crop | Rate L/ha | Timing |
|---|---|---|
| Potatoes | 3 + 1.5×2 | Tuber initiation + 2 bulking sprays |
| Wheat & barley | 3 + 2 | 2–6 leaf stage, maintenance 28 days later |
| Oilseed rape | 3 | Spring growth (also 3 in late autumn for winter) |
| Sugar beet | 2 + 2×2 | 4 true leaf + 2 sprays over 6 weeks |
| Grassland | 3 | Spring growth; 3 before each silage cut |
| Use | Dilution | Frequency |
|---|---|---|
| Foliar spray (veg & tomatoes) | 1:200 | Every 14 days during active growth |
| Root dip (transplanting) | 1:200 | Once at planting |
| Lawn & turf | 1:200 | Every 4 weeks during growing season |
| Hydroponics (irrigation) | 1:200 | Fortnightly in growing solution |
Volume Calculator — How Much Do I Need?
The Science — Cold-Press vs Alkaline Hydrolysis ▼
- ✓ Hand-harvested Argyll Coast seaweed
- ✓ Transported to Glasgow within 24 hours of harvest
- ✓ High-pressure cell-burst extraction — no heat
- ✓ Low-temperature concentration and cold bottling
- ✓ No chemical catalysts — zero alkaline hydrolysis
- ✓ Result: full bioactive preservation, pH 5–6
- ✗ Bulk seaweed, often unspecified origin
- ✗ Processed with harsh caustic chemical catalysts
- ✗ High pH and high heat permanently degrades hormones
- ✗ Cytokinins and auxins largely destroyed in process
- ✗ High-pH output (often pH 9–11) risks leaf scorch
- ✗ Cannot be safely used as seed or potato coating
Alga-Sol's Bioactive Profile — Verified Analysis
The Journey from Sea to Bottle
Hand-harvested Ascophyllum nodosum from the Argyll Coast, Scotland. Transported to our Glasgow facility within 24 hours of leaving the sea — preserving all natural bioactives.
High-pressure combined with ultrasound bursts the cell walls of the seaweed, releasing all bioactive compounds without any heat or chemical catalysts that would destroy them.
The aqueous extract is concentrated at cold temperatures, filtered for purity, and bottled immediately to lock in the complete bioactive profile of the original seaweed.
Proven Trial Performance — Independent Field Data ▼
Scientific meta-analysis across global independent peer-reviewed field trials (2019–2026) confirms the biostimulant effect of cold-press Ascophyllum nodosum extract. The figures below represent averages across multiple trial sites and growing conditions.
Marketable yield & dry matter content (starch) improvement when applied at tuber initiation.
Aqueous extracts improve chlorophyll density and nutrient uptake — higher grain weight and protein.
Foliar application optimizes sugar distribution, resulting in higher root weights and improved sugar purity.
Beyond yield — extracts improve sugar-acid ratio and Vitamin C levels for more nutrient-dense produce.
Data synthesized from independent scientific peer-reviewed field trials (2019–2026). Individual results will vary depending on soil type, growing conditions, crop variety and existing fertility programme.
Technical Specifications — REF: MFC-AS-01 ▼
| Specification | Detail |
|---|---|
| Product name | Alga-Sol™ Liquid Seaweed Extract & Biostimulant |
| SKU | MFC-AS-01 |
| Seaweed species | Ascophyllum nodosum (brown kelp) |
| Harvest origin | Argyll Coast, Scotland |
| Extraction method | Cold-press Cell Harvest Technology (no alkaline hydrolysis) |
| Processing time | Within 24 hours of harvest |
| pH | 5.0 – 6.0 (balanced — safe for direct foliar) |
| Laminarins | 1.17% |
| Alginic acid | 3.18% |
| Mannitol | 2.01% |
| Fucoidan | 0.49% |
| Pack sizes | 5L · 25L · 200L · 1000L IBC |
| Storage | Cool, dry place out of direct sunlight |
| Shelf life | 24 months unopened |
| Certification | 100% natural — contact us for organic scheme certification status |
| Manufacturer | Natures Merchant Ltd t/a Mifica Products |
| Manufactured at | East Kilbride, Glasgow G74 5PA |
"Our potato yield was noticeably better this season. We applied at tuber initiation as recommended — the trial data matches what we saw on farm."
25L · Commercial Potatoes · Trade Account"We've used a number of seaweed products over the years. The difference in our turf quality since switching to Alga-Sol has been clear to see, particularly through the dry summer."
200L · Sports Turf · Trade Account"Used on my allotment — tomatoes, courgettes and beans. The tomatoes in particular were remarkable, far more flavourful and higher yield than previous years."
5L · Home Allotment · Verified Purchase"I was sceptical at first but the pH argument convinced me to try it instead of our usual product. No more scorch risk when foliar spraying. Won't go back."
25L · Commercial Horticulture · Trade Account"Used it as a root dip for plug plants transplanted into the polytunnel. Establishment was noticeably faster and losses were much lower than the previous batch."
5L · Transplanting · Verified Purchase"We applied to 120ha of winter wheat in early spring at 3L/ha. Mixed with our standard tank. The crop came through the cold snap in far better shape than our untreated blocks."
200L · Cereals · Trade Account"IBC arrived on time with full tracking. The pallet was well strapped and arrived in excellent condition."
Delivery & Service · 1000L IBC"Quick turnaround on the 5L order. Arrived next day as promised and well packaged."
Delivery & Service · Verified PurchaseAlga-Sol — Questions Answered
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Commercial or large-scale enquiry? Contact us for agronomic advice, trade pricing and IBC delivery coordination →
