Premium Cover Crop & Green Manure Seeds — Wholesale Supply for Sustainable Agriculture 優質覆蓋作物和綠肥種子 — 可持續農業批發供應

Sesbania bispinosa leads all common cover crops at 150-300 kg N/ha — roughly 2-3 times the fixation rate of clover or cowpea. This extraordinary nitrogen output is due to its highly efficient symbiosis with Bradyrhizobium bacteria, forming large, active nodules even in flooded and waterlogged soils where most legumes fail. For tropical and subtropical climates (above 20 degrees C), sesbania is the clear choice. In temperate climates where sesbania does not establish (below 15 degrees C), alfalfa (150-200 kg N/ha) and red clover (100-150 kg N/ha) are the best alternatives. For hot, arid conditions, sunn hemp (Crotalaria juncea) fixes 100-150 kg N/ha with exceptional drought tolerance. For a complete picture: if you can grow sesbania in your climate, it is the nitrogen champion. If not, alfalfa is the next best choice for perennial systems, and red clover for annual rotations.

Plant cover crops as immediately as possible after cash crop harvest — within 2-4 weeks is ideal, with 0-2 weeks being even better. Every day of uncovered soil is a missed opportunity: nitrogen is volatilizing from the soil, erosion is occurring, and weed seeds are germinating in the ecological vacuum. Timing varies by climate: in tropical regions, cover crops can be planted year-round whenever a 45-90 day window exists between cash crops. In temperate regions, fall planting (immediately after grain harvest) is most common, allowing 8-12 weeks of growth before frost. Early planting is critical — a cover crop planted in September in Iowa will produce 3-4 times more biomass and nitrogen than one planted in October. In subtropical regions, planting at the start of the monsoon season ensures adequate moisture for establishment. Our agronomists provide specific planting windows for your location — contact us for personalized guidance.

Cover crops improve soil health through at least seven distinct mechanisms simultaneously. First, nitrogen fixation: legume species symbiotically convert atmospheric N2 into plant-available ammonium, directly feeding subsequent cash crops. Second, organic matter addition: incorporated cover crop biomass feeds soil bacteria and fungi, increasing microbial diversity and activity. Third, improved soil structure: cover crop roots penetrate compaction layers, creating biopores that persist for years and dramatically improve water infiltration. Fourth, erosion prevention: ground cover prevents rainwater from impacting bare soil and washing away topsoil. Fifth, increased microbial diversity: different cover crop species feed different soil microorganisms, building the complex soil food web that drives nutrient cycling. Sixth, reduced compaction: living roots actively break up hardpan, while the increased organic matter buffers against future compaction from field traffic. Seventh, improved water holding capacity: each 1% increase in soil organic matter holds an additional 20,000 liters of water per hectare. USDA research confirms 20-50% improvement in composite soil health indicators within 3 years of consistent cover cropping.

Green manure refers to cover crops grown specifically for incorporation into the soil as organic fertilizer, as opposed to cover crops grown primarily for erosion control or grazing. The term dates back over 3,000 years — ancient Roman agriculturalists documented the practice of incorporating legumes before planting grain crops. Modern soil science has fully validated what ancient farmers observed empirically: when green plant biomass is incorporated into soil, it decomposes rapidly, releasing nitrogen, phosphorus, potassium, and micronutrients in plant-available forms while simultaneously feeding soil microorganisms. The nitrogen from green manure is released more slowly than synthetic fertilizers (over 4-8 weeks rather than immediately), which actually reduces leaching losses and provides a more sustained nutrient supply to crops. For sesbania specifically, a single green manure crop can supply 150-300 kg of nitrogen per hectare — equivalent to 325-650 kg of urea fertilizer. At USD $600-800/tonne for urea, this represents USD $195-520/hectare in fertilizer value from a seed investment of $15-25/hectare.

Yes — cover crops are one of the most widely accepted practices in agricultural carbon markets. Major platforms including Indigo Ag, Nori, and Verra all accept cover cropping as a verified carbon sequestration practice. Typical payments range from $15-50 per acre per year, depending on the platform, your baseline soil carbon levels, and how many additional conservation practices you combine with cover cropping. Requirements typically include: documentation of cover crop species, seeding dates, and termination dates; baseline soil sampling; periodic verification soil sampling (usually every 3-5 years); and often satellite imagery confirmation of cover crop establishment. Many programs now accept remote sensing data in place of expensive manual verification, significantly reducing your cost of participation. Nori allows retroactive enrollment for up to 10 years of past cover crop practice — meaning farmers who have been cover cropping for years can immediately sell credits for historical carbon sequestration. Contact us: our ISTA-certified test reports and species documentation provide the verified records required by platform MRV protocols.

Our standard wholesale minimum is 1 metric ton (1,000 kg) per species, which is typically what fits in a single pallet shipment and represents the minimum quantity that makes sea freight economically efficient. However, we understand that new customers and smaller distributors need to evaluate our quality before committing to full container loads. For this reason, we offer sample orders of 5-25 kg per species — these are priced at standard retail rates, but the full sample cost is credited back against your first commercial order exceeding 5 MT. Volume discounts begin at 5 MT per species (5-8% discount), increasing at 20 MT (10-15%) and 50+ MT (negotiated). For distributors launching new product lines or agricultural retailers testing a new species in their market, we have structured a New Market Entry package: up to 5 species at 200 kg each (1 MT total) at slightly above standard wholesale pricing, with full commercial documentation. This allows genuine market testing without the commitment of a full container.

Yes — we export to 45+ countries across six continents, with established shipping lanes to the United States, Canada, Australia, the UK, Germany, France, the Netherlands, South Africa, Kenya, UAE, Saudi Arabia, India, Vietnam, Thailand, Indonesia, the Philippines, South Korea, Japan, and many more. All shipments depart from Port Qasim, Karachi, Pakistan — one of South Asia's premier bulk commodity export ports with daily sailings to all major global destinations. We handle all export documentation in-house: phytosanitary certificates (issued by Pakistan's Department of Plant Protection, recognized by 180+ countries), certificates of origin (FPCCI-certified), ISTA test reports, fumigation certificates, commercial invoices, and bills of lading. We work directly with your customs broker or freight forwarder, or can recommend established partners in your destination country. Standard shipping is sea freight (LCL or FCL); air freight is available for urgent orders or sample shipments. We have successfully navigated import requirements for even the most demanding regulatory environments including the EU, USA (USDA APHIS), and Australia (DAFF).

Every commercial lot we export carries a full documentation package: ISTA-certified testing (germination, purity, moisture, 1000-seed weight — performed by accredited third-party laboratories, not self-certified), Phytosanitary Certificate issued by the Pakistan Department of Plant Protection (internationally recognized under the IPPC framework), Certificate of Origin issued by the Federation of Pakistan Chambers of Commerce and Industry (FPCCI), Fumigation Certificate (methyl bromide or phosphine treatment per importing country requirements), and a signed Commercial Invoice with full species, quantity, and quality details. For customers importing into regulated markets, we can additionally provide Seed Analysis Certificates in ISTA Orange or Blue form, Treatment Certificates for specific pest exclusion requirements, and sworn affidavits of origin for agricultural inputs. Our seed quality is verified not by our own statements but by independent accredited laboratories — this is a fundamental quality guarantee that distinguishes Kohenoor International from suppliers who self-certify their product quality.

Climate matching is the most important factor in cover crop selection — a species planted outside its optimal temperature range will deliver a fraction of its potential benefit. Use this guide: Hot tropical climates (average 25-35 degrees C, no frost): Sesbania bispinosa is the premier choice, followed by sunn hemp and cowpea. Warm subtropical climates (15-30 degrees C, occasional light frost): sesbania (where frost-free), berseem clover, mung bean, guar. Temperate climates (5-20 degrees C, regular frost): red clover, crimson clover, hairy vetch, alfalfa (for longer growing season). Cool maritime climates (5-15 degrees C): white clover, red clover, field peas. Hot arid and semi-arid (25-40 degrees C, low rainfall): guar (most drought-tolerant), cowpea, sunn hemp. Flooded or waterlogged soils: sesbania is uniquely adapted — it is the only widely cultivated legume that actively fixes nitrogen in standing water, making it irreplaceable for paddy rice systems. Contact our agronomic team with your average minimum and maximum temperatures, annual rainfall, and growing season length — we will provide a ranked species recommendation for your specific conditions at no charge.

Typical ROI from cover cropping runs 200-400% over a 3-year period, with positive returns beginning in Year 1 for most operations. Here is the breakdown by year: Year 1 — Fertilizer savings typically deliver a 50-80% return on seed cost in the first season alone. Where USDA EQIP or equivalent government subsidies apply, Year 1 ROI can exceed 200% before counting any agronomic benefit. Years 2-3 — Soil health improvements compound: yield increases of 5-15% on the cash crop begin manifesting as the soil microbiome responds to increased organic matter. Reduced pesticide and herbicide costs emerge as beneficial insects proliferate and soil biology suppresses weed germination. Carbon credit enrollment adds $15-50/acre of net new income. Iowa State University Extension research confirms a net annual benefit of $25-75 per acre from cover cropping across Midwestern corn-soybean operations, after all costs. For operations in high-subsidy environments (EQIP, EU eco-schemes), the net benefit exceeds $100/acre annually. The seed investment of $12-30/acre typically pays back within 4-8 months of the first season. No other agronomic input delivers comparable returns across such a range of farm types and geographies.

Legume cover crops can realistically replace 50-80% of nitrogen fertilizer requirements for most field crops in the first 1-2 years of adoption, with full replacement achievable in mature systems with consistent cover crop management. For nitrogen specifically: sesbania fixing 150-300 kg N/ha can fully satisfy the nitrogen needs of a 7-10 tonne/hectare rice crop or an 8-10 tonne/hectare wheat crop without any supplemental synthetic nitrogen. For corn at 200 bu/acre (requiring approximately 200-220 kg N/ha), sesbania cover crops alone can typically supply 80-100% of that requirement depending on growing season length and soil conditions. Phosphorus and potassium are more complex: cover crops do not fix P or K from the atmosphere, but they do solubilize soil-bound phosphorus through mycorrhizal activity and organic acid production, and cycle potassium from deep soil layers to the surface through deep-rooted species. Complete replacement of all synthetic fertilizers (N + P + K) is achievable in systems that combine nitrogen-fixing cover crops with composting, but typically requires 3-5 years of soil building. For smallholder farmers who cannot afford synthetic fertilizers, high-quality legume cover crops are not just a cost reduction — they are the only viable path to productive agriculture.

The key to successful cover crop integration is treating the cover crop as a full-season crop requiring the same attention as your cash crop. Step 1: Plant within 2-4 weeks of cash crop harvest — use the same field equipment you have. Broadcast seeding, drilling, or aerial application all work; drilling gives slightly more consistent establishment. Step 2: Manage the cover crop through its growing season — occasional scouting for pest damage or poor establishment areas. No irrigation required for most species in adequate rainfall environments. Step 3: Terminate 2-3 weeks before planting your next cash crop. Termination options: mowing (fastest, works for low-biomass crops), roller-crimping (ideal for no-till, terminates high-biomass crops effectively), light tillage incorporation (fastest nutrient release), or herbicide (desiccation — label-compliant herbicides only). The 2-3 week termination window is critical: it gives enough time for initial decomposition and nitrogen release while preventing moisture competition with the establishing cash crop. Step 4: Plant your cash crop directly into the terminated cover crop residue using a no-till planter, or prepare a light seedbed if conventional tillage is your system. The decomposing cover crop residue acts as a slow-release fertilizer and mulch layer simultaneously.

Yes — custom cover crop blends are one of our most popular wholesale products, particularly for distributors serving diverse agricultural markets. Our agronomists design multi-species mixes tailored to your customers' specific soil types, climates, and objectives. Common blend categories we produce include: Tropical N-Fixation Blend (sesbania 60% + cowpea 30% + mung bean 10% — for maximum nitrogen in warm climates), Temperate Soil Builder (red clover 40% + crimson clover 30% + hairy vetch 30% — for cold-hardy nitrogen fixation), Arid Dryland Mix (guar 50% + cowpea 40% + sunn hemp 10% — drought-tolerant nitrogen), Cocktail Cover Mix (5-8 species for maximum biodiversity and soil biology stimulation), and Forage + Cover Dual-Purpose (species selected to deliver nitrogen fixation plus high-quality livestock forage). We blend in-house using precision volumetric blending equipment, with each blend batch tested for overall germination and verified species composition. Custom blend development is provided free of charge for wholesale orders exceeding 5 MT total. Minimum blend order is 500 kg per blend formulation.

Lead times vary by order size, species, and season. For our core species (sesbania, alfalfa, berseem clover): Standard orders 1-20 MT — 2-4 weeks from order confirmation and deposit receipt. This includes seed processing and cleaning, ISTA testing, documentation preparation, and booking with the shipping line. Large orders 20-100+ MT — 4-6 weeks, as these require harvesting from reserve stock or processing larger quantities through our cleaning facility. Specialty or low-volume species (some clover varieties, guar, specific mung bean varieties) — add 1-2 weeks as we source from partner farms. Peak season (March-August) — add 1-2 weeks to all timelines, as this is the highest global demand period when shipping lines are heavily booked. Express fulfillment: for urgent requirements, we offer expedited processing at a 15% premium, reducing lead time by approximately 50% for orders under 20 MT. Air freight (for orders under 500 kg) can deliver within 5-10 days of processing completion. We maintain safety stock of sesbania and alfalfa year-round to accommodate urgent requirements from established distribution partners. Always communicate your required delivery date upfront — we will give you an honest assessment of achievability and work to meet your timeline.

Yes — free technical consultation is included for all wholesale customers and is one of the most valued services we provide. Our agronomic support encompasses: species selection consultation (matching cover crops to your climate, soil type, and production goals), seeding rate calculations based on your germination rate and target plant population, planting timing recommendations calibrated to your local climate data, termination method guidance (mowing, rolling, tillage, or chemical options with pros and cons for each), soil test interpretation and cover crop species recommendation based on your soil nutrient profile, and crop rotation planning to maximize the nitrogen credit from cover crops for subsequent cash crops. Support is provided via email (response within 24 hours), WhatsApp (real-time during business hours Pakistan time, 9am-6pm PKT), and video call (scheduled for complex technical questions or new distributor onboarding). For our largest distribution partners, we also offer on-site agronomic visits to your territory for customer training events and demonstration plot setup. All support is completely free — it is how we ensure you succeed with our products and continue to grow your cover crop business.