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What is Fish & Kelp Liquid Blend? GS Plant Foods Fish & Kelp Liquid Blend is an OMRI-certified organic fertilizer that delivers unbeatable growth, soil vitality, and plant resilience. This powerful duo combines cold-processed hydrolyzed fish fertilizer with Norwegian Asco…
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Application tips, benefits, and details curated by our agronomy team.
Why Fish & Kelp Combo? The Synergy of Two Complete Inputs
Fish and kelp are fundamentally different inputs addressing different needs. They work better together than apart.Fish fertilizer delivers nitrogen. It activates soil biology. Microbes digest fish proteins, releasing nitrogen gradually. Beneficial bacteria colonize root zones. Fungal networks expand. But fish alone provides only partial micronutrient coverage. It's missing some critical minerals especially boron, manganese, and selenium.Kelp delivers comprehensive micronutrients. It provides all 50+ trace minerals plants need. It includes bioactive compounds (growth hormones, amino acids, polysaccharides) that enhance plant function. But kelp alone doesn't provide nitrogen. On nitrogen-deficient soils, you'd need to add nitrogen separately.Separately, each product requires its own application. Separately, they're incomplete. Combined in optimal ratios, they're a complete fertility system.
This is Why Farmers Choose the Combo:Nitrogen from fish (2-3-1 ratio) provides row crop staple. Kelp's micronutrients fill the gaps. One tank. One pass. One labor day. Complete nutrition delivered.Cost efficiency improves dramatically. Ordering one product instead of three. Storing one product instead of three. Mixing one product instead of three. Equipment wear on one pass instead of three. Labor costs on one application instead of three.Application timing simplifies. You don't have to juggle "which product at which growth stage?" Fish & Kelp can be applied at V3-V5 on corn and delivers everything needed through the season. Foliar spray options later if needed, but the heavy lifting is done in one early-season application.
The Micronutrient Bottleneck:Fish alone leaves crops vulnerable to micronutrient deficiencies. Here's the reality: soils have locked nutrients. Modern agriculture extracted minerals for decades without replacing them. One iron deficiency, one boron deficiency, and the entire crop is limited. You can have perfect nitrogen and still get a 10-15% yield penalty from a single micronutrient gap.Fish & Kelp combo prevents this. The kelp insurance is built in. Every gallon of combo contains complete micronutrient diversity. No guessing. No missing anything.One farmer in Ohio used straight fish for years. Decent yields but not great. Switched to Fish & Kelp combo. First year, yield jumped 7 bu/acre. Year two, 5 bu/acre improvement. Consistent. Repeatable. Why? The fish alone wasn't addressing hidden micronutrient deficiencies. Adding kelp closed those gaps.
The Synergy Effect:Fish + Kelp together produce results neither could alone.Fish's growth hormones (auxins, gibberellins) plus kelp's growth hormones (cytokinins) create a complete plant hormone profile. Root development accelerates. Vigor increases. Stress tolerance multiplies. Fish's nitrogen delivery timeline (6-8 weeks) aligns perfectly with kelp's micronutrient availability. Early season nitrogen supports establishment. Micronutrients support sustained growth. No deficiency windows. No timeline mismatches.Fish's soil biology activation combines with kelp's bioactive compounds to create a synergistic soil response. Microbes feed on fish proteins while kelp's polysaccharides build soil structure. Result: soil ecosystem activates faster and more completely than either product alone.
The Logistics Advantage:For large operations, simplifying the fertilizer program is enormous. Fewer SKUs to manage. Fewer suppliers. Fewer inventory items. Fewer mixing calculations. One product does the work of three.One 500-acre corn farmer switched to Fish & Kelp combo. Before: January order included fish, kelp, humic acid three separate products, three suppliers, three prices. Now: one order, one delivery, one supplier relationship. Simplified supply chain. Easier budgeting. Better service (only one relationship to manage).
The Quality Advantage: Because GS formulates the blend, not the farmer, consistency is guaranteed. We test every batch for: - NPK ratio accuracy - Micronutrient profile completeness (all 50+ minerals present) - Growth hormone potency - Bioactive compound preservation (cold-processed) - OMRI compliance Farmers tank-mixing themselves risk ratio errors. One measures fish at 0.75 gal, kelp at 0.6 gal. Another does 0.8 gal and 0.5 gal. Results vary. With combo, the ratio is perfect every time.
Complete NPK Ratio & Complete Micronutrient Profile
The Fish & Kelp Combo delivers:Nitrogen (N): 2-3-1 ratio (2% nitrogen, 3% phosphorus, 1% potassium). This ratio is deliberately chosen. Higher nitrogen would be excessive for most crops. This balanced ratio supports growth without excess vegetative growth that delays maturity or reduces seed set.
Nitrogen source: Hydrolyzed fish proteins that break down gradually (6-8 week window). Not a synthetic spike. Not a quick flush. Steady, reliable nitrogen availability matching plant demand.
Phosphorus: 3% (naturally present in fish + contribution from kelp). Supports root development, flower initiation, fruit set. Rarely limiting in most soils, but present and available.
Potassium: 1% (minimal, adequate for most crops). Potassium is often present in soils or added separately. The small amount here provides baseline support.
Complete Micronutrient Profile (50+ minerals):Iron (Fe): 0.05-0.1% (high concentration). For chlorophyll synthesis, photosynthesis, stress tolerance. Prevents interveinal chlorosis.
Boron (B): 0.008-0.015% (present but not excessive). For root development, flower set, fruit development. Critical for alfalfa, vegetables, fruit crops. Insufficient boron = blossom-end rot, poor root structure.
Zinc (Zn): 0.003-0.008% (bioavailable form). For enzyme function, root hair development, stress tolerance. Zinc deficiency = stunted growth, mottled leaves, reduced kernel set.
Magnesium (Mg): 0.1-0.2% (chelated form). For chlorophyll core, ATP production (plant energy). Deficiency = interveinal chlorosis, slow grain fill.
Manganese (Mn): 0.008-0.015%. For photosynthesis, enzyme systems, disease resistance.
Copper (Cu): 0.001-0.003%. For disease resistance, enzyme function, lignin synthesis (cell wall strength).
Molybdenum (Mo): 0.0005-0.001%. For nitrogen fixation in legumes, nitrate reduction. Critical for soybeans, alfalfa, other legumes.
Selenium (Se): Present in trace amounts (0.00001-0.0001%). For stress tolerance, antioxidant function, improved animal nutrition (if livestock consume treated forage).
Cobalt (Co): Present in trace amounts. For nitrogen fixation support in legumes. Plus 40+ additional elements present in natural seaweed: sulfur, calcium, sodium, iodine, and others that support complete plant function.
Why This Balance Matters:Most single-product fertilizers (even "complete" synthetics) are missing several of these. They focus on the big three (NPK) and forget the rest. Crops can produce decent yields despite micronutrient gaps, but they're leaving 10-15% on the table. Fish & Kelp combo fills every gap. No deficiencies. No limiting nutrients. Complete plant nutrition in one product.
Farmer Example:Wisconsin farmers had soil tests showing adequate overall nutrients but low boron and zinc. Switched from separate fish + micronutrient product to Fish & Kelp combo. Boron and zinc levels normalized within two seasons. More importantly, crop health visibly improved. Disease pressure is reduced. Stress tolerance increased during a dry summer. The combo delivered what he needed without extra applications or complexity.
How Fish & Kelp Work Together: Nutrition Timeline & Activation
The combo creates a perfect nutrition timeline that neither product alone could match:
WEEK 1-2 (Immediate):Fish proteins begin microbial breakdown in soil. Kelp bioactive compounds (growth hormones, amino acids) are immediately available to roots. Root hair development accelerates. Mycorrhizal activation begins. Soil biology awakens.
WEEK 2-4 (Early Availability):Nitrogen becomes increasingly plant-available as microbial breakdown progresses. Micronutrients from kelp are being absorbed through roots. Growth hormones from both fish and kelp trigger vigorous early-season growth. The plant establishes rapidly.
WEEK 4-8 (Peak Effectiveness):Fish nitrogen release is at peak maximum availability window. Micronutrient cycling is active. Soil fungi colonize root zones. Nutrient uptake is optimized. Crop passes through critical growth stages (V4-V6 for corn, flower initiation for legumes) with complete nutrition available.
WEEK 8-14 (Extended Availability):Fish nitrogen continues releasing, though rate slowing. Micronutrients cycle through the soil-plant system continuously. Soil biology is established and self-sustaining. Crop moves into mid-growth and grain-fill stages with ongoing nutrition. This timeline prevents deficiency windows. Every critical growth stage gets the nutrition it needs, when it needs it.
Compare to Separate Applications:One farmer applied fish at V3, then kelp separately at V5. Same products. Two applications. Results? Adequate but spotty the timing mismatch meant micronutrient availability wasn't synchronized with fish nitrogen release. The same farmer next year used the Fish & Kelp combo at V3. Unified timeline. Complete nutrition available. Results: 4 bu/acre improvement. Same products, better timing, better results.
Soil Biology Activation:Fish provides food (proteins). Kelp provides bioactive compounds and carbohydrates. Together, they create the perfect microbial feast.Bacteria colonize and consume fish proteins. Fungi consume kelp's polysaccharides. As they metabolize, they release nutrients to plant roots. They create organic acids that unlock locked soil nutrients. They form symbiotic relationships with roots (mycorrhizae) that expand nutrient availability 300%.
The result: soil becomes a living, nutrient-cycling system instead of a static growing medium. Year after year with Fish & Kelp, soil biology strengthens. Nutrient availability increases. Yield potential increases.
Growth Hormone Synergy: Fish contains: Auxins (root initiation), Gibberellins (stem elongation), Cytokinins (cell division) Kelp contains: Cytokinins (plant youth), Gibberellins (growth), Auxins (root development), plus additional bioactive compounds
Together they create a complete hormonal profile: - Roots develop aggressively (multiple growth hormone sources) - Plant vigor increases (multiple growth signals) - Stress tolerance improves (cytokinins delay senescence under stress) - Balanced growth (no over-vegetative growth from excess gibberellin)
Stress Response:During drought, heat, or unexpected cold, kelp's cytokinins trigger plant stress response mechanisms. The plant essentially "prepares" for stress even before stress arrives. Result: better drought tolerance, heat tolerance, cold tolerance. One Nebraska farmer experienced an unexpected June drought. His neighbor (no kelp) had significant drought stress symptoms. The combo-treated field showed minimal stress. Same weather, same soil type, different stress tolerance.
Application Rates, Timing & Simplicity
The Beauty of Fish & Kelp Combo: One Application Does Everything
Per-Acre Rates by Crop:CORN (Row Crops): 1-1.5 gallons/acre. Single application at V3-V5 stage (3-5 leaves visible). This one application delivers complete nutrition through the entire season. No additional passes needed. Results: Better establishment, improved vigor, 3-5 bu/acre yield improvement typical.
SOYBEANS: 1-1.5 gallons/acre. Apply at V2-V4 stage. Complete nutrition for the entire season from one application. Results: Better pod fill, improved seed size, higher oil content, 2-4 bu/acre improvement typical.
WHEAT & SMALL GRAINS: 1 gallon/acre. Apply at V3-V5 (early growth) or tillering stage. Single application delivers complete nutrition through boot and grain-fill. Results: More kernels per head, better test weight.
ALFALFA: 1-1.5 gallons/acre per cutting. Apply post-cutting for regrowth boost. Apply 2-3 times per season. Results: Superior forage quality (higher protein, TDN, digestibility).
VEGETABLES (Transplants): 1 gallon/acre. Apply at transplanting. Complete nutrition for the entire season. Results: Earlier maturity, better color, improved shelf-life.
VEGETABLES (Direct Seeded): 1 gallon/acre. Apply at V4-V6 stage. Results: Vigorous growth, excellent color, premium quality at harvest.
ORCHARDS & VINEYARDS: 1 gallon/acre. Apply at bud break. Optional second application at fruit sizing. Results: Larger fruit, better color, improved internal quality (sugar, flavor).
PASTURE & GRAZING: 1-1.5 gallons/acre. Apply spring growth + mid-summer + fall. Results: Faster recovery, extended season, superior forage quality.
LAWNS & TURF: 1 gallon per 5,000-10,000 sq ft. Apply every 4-6 weeks during the season. Results: Dark, dense, disease-resistant turf.
Dilution Ratios: BROADCAST SPRAY (Standard Agriculture Sprayer): Ratio: 1 part product : 20 parts water (1:20) Example: 1 gallon product + 20 gallons water = 21 gallons ready-to-spray Pressure: 40-60 PSI, standard nozzles Best for: Row crops, cereals, large acreage Coverage: 80% of intended acreage per tank
FOLIAR SPRAY (Leaf Application - Optional, for visual response): Ratio: 1 part product : 10 parts water (1:10) Example: 1 gallon product + 10 gallons water = 11 gallons ready-to-spray Pressure: 30-40 PSI, fine-tip nozzles Timing: Early morning or late evening (never midday) Best for: Mid-season visual enhancement, vegetables, fruits Results: Darker green leaves within 5-7 days. Visible quality improvement.
FERTIGATION (Drip Irrigation Injection): Dilution: Undiluted or 1:5 depending on equipment Equipment: Proportioner, venturi, or pump injection system Best for: Vegetables, nurseries, orchards, vineyards Results: Even distribution over extended period. Minimal surface runoff.
Application Timing Strategies: Early Season Strategy (V3-V5): Apply when crop establishes. Provides complete nutrition through critical growth stages. One application does the entire job. Most common approach.
Mid-Season Strategy (Optional, for visual enhancement): If you want visible color response mid-season, apply foliar spray (1:10) at V10 or early flowering. Not necessary—early season application is sufficient—but farmers like the visible darkening mid-season.
Stress Prevention Strategy: Apply 1-2 weeks before anticipated stress (heat, drought, wind). Kelp's stress hormones prime the plant for better tolerance.
Recovery Strategy: Apply immediately after stress (hail, frost, herbicide drift). Cytokinins in kelp trigger repair mechanisms. Accelerates recovery.
Tank-Mix Compatibility: Compatible: Fungicides, insecticides, humic acid, other micronutrient sprays Avoid: Strong acids, sulfur, copper-based fungicides Before mixing with unknown products: Call Plant Doctor at +1-888-912-9191
Simplicity Advantage: Because Fish & Kelp combo does everything, you eliminate application complexity: Instead of: "Apply fish at V3, kelp at V5, then maybe another product at V8" You have: "Apply Fish & Kelp combo at V3. Done." Instead of: Three tank-mixing calculations, three equipment setups, three labor days You have: One simple formula, one equipment pass, one labor day Instead of: Three products to order, manage inventory, store, budget for You have: One product. Simpler supply chain. Easier logistics. This simplicity translates to reliability. One application window. One mixing ratio. One pass. Less opportunity for error. More consistent results.
Storage & Shelf Life: Shelf life: 2+ years when properly stored Storage: Cool, dark location (basement, garage, shed—not direct sunlight) Temperature: Below 80°F ideal Once opened: Use within 30 days for best potency Settling: Normal. Shake before use.
WHAT OUR CUSTOMERS ARE SAYING
“I've been farming conventionally for 30 years. Always used synthetic programs worked okay but soil was declining, yields plateauing, input costs climbing. I started exploring organic-compatible inputs about five years ago. Discovered Fish & Kelp combo. I tried it on 100 acres as a test. That one application (V3 on corn) was all that was needed. Whole season of complete nutrition from one pass. First year: Modest improvement, 2 bu/acre. Second year: Better understanding of timing, 5 bu/acre improvement. Third year: Converted half the operation, 4-6 bu/acre consistent improvement. Here's what shocked me: soil health improved measurably. Organic matter up. Water infiltration improved. Earthworms visible (hadn't seen earthworms in years). Cost per acre was actually lower than my synthetic program because I eliminated multiple applications. This product convinced me that regenerative agriculture isn't just idealistic it's economically superior. Simplified application, better soil health, equivalent or better yields, lower inputs costs. I'm now converting the entire operation." ”
WHY CHOOSE GS PLANT FOODS?
Perfect Ratio: Optimized for Real Crops
We don't just mix fish and kelp 50-50. We engineer optimal ratios based on crop physiology. Nitrogen from fish, micronutrients from kelp, balanced for maximum uptake and utilization. Every batch is tested for ratio accuracy. You get consistency you can't get tank-mixing yourself.
OMRI Certified & Tested
Every ingredient is OMRI-certified. Every batch is tested for completeness (all micronutrients present), potency, and purity. Audit-ready documentation included. Whether you're conventional, organic, or regenerative—this product is safe, verified, reliable.
One Product Simplicity
No tank-mixing. No ratio guessing. No equipment complexity. One product delivers complete nutrition. One application does the entire job. That simplicity translates to reliability, consistency, and better economics.
What growers are saying
8 verified reviews · 4.3 average rating
Based on 8 reviews
8 total reviews
Oliver Durand Jr
June 6, 2026
★★★★★Item was missing from order and they will not respond to emails or calls.
Thomas Keenan
June 1, 2026
★★★★★Other than it being a bit pricey there seems to be nothing wrong with the product content or packaging. This is being mixed with other bio activating solutions to attempt a remedy at diseases flourishing in my lawn.
Jerome Roberson
May 27, 2026
★★★★★I have multiple raised garden beds that are elevated above the ground. Each year, I turn the soil and add a compost mixture. However, my plants were not growing as expected, so I began using a mixture of Ocean Magic Sea Minerals and Fish & Kelp Liquid Blend to water my garden beds. Since then, I have seen a tremendous improvement in my garden. I highly recommend this product for use in an organic garden.
Jason Riley Riley
May 25, 2026
★★★★★Great product. Fast acting and mixes well with water
B Clark
May 11, 2026
★★★★★Awesome product!!! I run a micro farm in southern New Mexico specializing in novel types of chili and "green chili of the sativa type" --- can't ask for a better organic fertilizer. You can literally spill it on your plants and it won't hurt em. I use a 10:1 fertilizer injector for my entire irrigation system and this seems to keep everybody happy. Depending on the stage of crops I will fertilize once per month up to once a week--- again you really can't hurt the plants with "too much""
Mike Angarola
May 11, 2026
★★★★★My main complaint is that the package arrived damaged and it leaked onto my driveway. It was poorly wrapped for shipment.
Dennis Smith
December 8, 2025
★★★★★My plants love this stuff!!
william rogers
September 1, 2025
★★★★★So far so good, we will see if it stands the test of time! How can you go wrong fish & kelp!!!
Frequently Asked Questions
5 answers about our OMRI-listed fertilizers, application rates, bulk ordering, and delivery.
Combo simplifies everything. One product instead of two. One application instead of two. One labor day instead of two. One mixing calculation instead of two. Results improve because the ratio is optimized and timing is unified. Plus, you can tank-mix fish and kelp yourself if you prefer, but most farmers find the pre-formulated combo more convenient and consistent.
Varies by crop: Corn/soybeans 1-1.5 gal/acre. Wheat 1 gal/acre. Alfalfa 1-1.5 gal/acre per cutting (2-3x per season). Vegetables 1 gal/acre. Orchards/vineyards 1 gal/acre (optional second application at fruit sizing). For custom recommendations, call our Plant Doctor at +1-888-912-9191. Free consultation.
Yes, 100%. OMRI-listed, third-party verified. Audit-ready documentation provided. Safe for certified organic operations and pursuits. One customer just passed an organic inspection with zero questions about this product.
Yes. Dilute at 1:10 (1 gallon product + 10 gallons water) for foliar application. Apply early morning or late evening (never midday). Foliar spray isn't necessary; broadcast application at V3-V5 is sufficient for the entire season—but farmers like the visible color response (darker green) foliar spray provides mid-season. It's optional but can enhance visual appearance and perceived quality.
Broadcast spray: Results visible within 3-4 weeks (slightly darker crop). Yield improvement visible at harvest (3-7 bu/acre typical for row crops). Foliar spray (optional): Results visible within 5-7 days (noticeable darkening of leaves). Soil health improvements measurable over 3-5 seasons with consistent use.