Organic Fertilizers and Gardening Supplies, Rock Dust, Worm Castings
  • Agrowin's Worm Castings and Rock Dust. Improve your garden with these essential soil amendments.
  • Agrowinn's Organic Fertilizers.  Choose from our assortment of custom blended fertilizers: Rose and Flower Fertilizer, Vegetable Fertilizer, Acid Lovers, Palm Food, Lawn Food, All Purpose Fertilizer.
  • Natural and Humane Pest Control.  Choose from our wide variety of natural and humane pest control options.


Organic Home Gardening Supplies
Agrowinn Organic Fertilizers carries a full line of products to support you in creating the ultimate organic home garden. >>more


Natural Landscaping
For many years, Agrowinn has been a landscaper's best friend. Our soil amendments and fertilizers provide the foundation support for excellent landscaping. >>more


Vineyards Fertilizers
Organically certified vineyards and viticulture enthusiasts require the highest quality organic fertilizers and soil amendments to create world-class wines. Agrowinn's products are your best source for healthy grapevines. >>more


Organic Agriculture Supplies
Organic Farms require the best organic fertilizers and soil amendments for top-quality produce. Agrowinn provides the highest quality products to meet your agriculture needs. >>more


Hydroponics Supplies
Agrowinn's products are ideal for hydroponic growing. Read more about how our products can improve the quality of your hyroponically grown produce. >>more


Aquaponics Supplies
Aquaponics is an exciting and up-and-coming agricultural practice. Agrowinn provides products that promote successful growing. >>more


Aquaponics Supplies
Organic orchards require special care. Our products ensure your soil is balanced for superb tasting produce and abundant fruit production. >>more


Greenhouse Growers Organic Fertilizers
Greenhouse growers love our products. From produce to flowers, our soil amendments and fertilizers are the ideal choice for greenhouse growing. >>more


Golf Course Fertilizers and Soil Amendments
We provide the highest quality natural soil amendments and organic fertilizers for golf courses. >>more

About Our Organic Fertilizers and Soil Amendments

AGROWINN produces a full line of organic fertilizers and soil amendments, for all your gardening needs. Rock Dust -- aka Rock Powder or Stonemeal (Stone meal), Worm Castings, aka Earth Worm castings or castings. These are 100% natural, organic products, for use in all types of soils or hydroponically grown plants. Use them on any flower, fruit and ornamental trees, shrubs, lawns, and especially on vegetables which require organic plant food for nutrients.

We strive to be the best resource for organic, environmentally-safe fertilizers and other soil amendments. In doing so, we provide effective solutions for all your gardening and landscaping problems.

Why organic is superior to chemical fertilizers

Fertilization with high concentrations of Nitrogen, Potassium, and/or Phosphorus (N-P-K such as 15-15-15 or 20-20-20), stimulates rapid initial plant uptake of trace minerals (also known as trace elements) without providing for their replacement.

Excessive nitrogen reduces the valuable calcium available to the plant. Calcium is a "cation", together with Magnesium, Potassium, and Sodium. A reduction in the available Calcium, always leads to an imbalance in the "cation exchange". If cations are out of balance, anions will also not work properly, nor will several important trace elements.

Excessive Nitrogen use is also leading to a "tightening" of vast amounts of soil on agricultural land. Additionally, a mostly unknown fact is that the carrier materials for chemical fertilizers can be sewage sludge, and sludge represents about 80% of the weight of that fertilizer. This type of granulated fertilizer is commonly used for lawns and turfs.

Liquid fertilizer, which is widely used in commercial agriculture, causes the leaching of a large amount of N-P-K into the ground. This is one of the most serious environmental problems we have today. The government will soon require water run-off impact permits if this problem isn't dealt with by industry and consumers.

For some time, researchers, using fairly coarse rock dust (the only kind available to them) have tried to justify the remineralization of the soil with rock dust. The question now is no longer whether to re-mineralize, but where to get the best universal rock dust.

How Agrowinn can help!

Agrowinn's fertilizers and soil amendments are environmentally friendly and will not leach into your ground water. These products also do not contain excessively high concentrations of Nitrogen, Potassium, and/or Phosphorus, and they are also more efficient, both in the short-term and the long-term.