Made in California
Made in California
Made in California
Made in California
Made in California
Made in California
Made in California
Made in California
Made in California
Made in California
What does your garden — or your body — need today?
Shop by Crop
Custom-blended formulas for the crops you actually grow.
Tomatoes & Fruiting Vegetables
Bigger fruit, deeper flavor, more abundant harvests. Works for tomatoes, eggplant, melons, and squash.
Lettuce & Leafy Greens
Tender, fast-growing leaves with rich color and density. Ideal for lettuce, kale, spinach, and chard.
Peppers & Herbs
Stronger flavor and bigger yields for peppers, basil, cilantro, mint, and culinary herbs.
Strawberries & Berry Crops
Sweeter, juicier berries with bigger harvests. Built for strawberries, blueberries, and bramble fruits.
Cucumbers & Vine Crops
Crisp, productive vines with steady harvests. Ideal for cucumbers, zucchini, and squash.
Azaleas, Camellias & Acid-Loving Shrubs
Vibrant blooms and lush foliage for plants that thrive in acidic soil. Built for azaleas, camellias, rhododendrons, hydrangeas, and blueberries.
Why Greenway Biotech
Greenway Biotech, Inc. is a family-owned fertilizer and USP magnesium manufacturer in Madera, California, operating since 1989. Every product is made in our own FDA-registered facility — we are the manufacturer, not a reseller.
Our fertilizers are CDFA-registered, custom-blended NPK formulas with chelated micronutrients. Every batch is third-party tested for heavy metals, with results available on request. Our magnesium products are USP pharmaceutical grade with no fillers.
We've shipped to gardeners, hydroponic growers, and commercial farms in all 50 states, and we manufacture private label and contract blends for other brands. Thousands of verified customer reviews, three decades running.
Not Sure Where to Start?
Take our 2-minute quiz — we'll match you to the right fertilizer for your crop, soil, and goals.
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- from $ 31.99
- Sale Price
- from $ 31.99
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- $ 29.99
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For Your Body, Not Just Your Garden!
USP-grade magnesium and personal care, made in the same FDA-registered California facility.
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Best Fertilizer for Houseplants: Rates, Timing & Salt Buildup
Light and active growth set the feeding rate for houseplants — not the calendar. Covers the 3:1:2 ratio, how much to feed by light level, tap water and alkalinity problems, salt buildup and flushing, and when not to feed at all.
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Best Fertilizer for Avocado Trees: Rates, Timing & Salt Sensitivity
Avocado feeding runs by different rules: shallow roots that burn on heavy doses, extreme chloride sensitivity, and UC research showing timing around bloom matters as much as amount. Rates by age, zinc fixes, and root-rot checks.
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Best Fertilizer for Citrus Trees: Alkaline Soil, Rates & Deficiencies
On alkaline western soil, yellow citrus leaves are usually a pH problem, not a fertility problem. How to tell zinc, iron, manganese, magnesium and nitrogen deficiency apart, what to feed, how much by tree age, and when to stop.
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The Healing Garden: A Nurturing Guide to Mental Wellness Through Plant Care
Clinical research shows gardening and plant care significantly reduce depression, anxiety, and stress. Learn which plants offer the most therapeutic value and how to build a healing garden — from a single houseplant to a full backyard retreat.
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The Ultimate Guide to Deep Hydration: Ingredients for Silky Smooth Skin (2024)
The Ultimate Guide to Deep Hydration: Ingredients for Silky Smooth Skin (2024) Whil...
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Exploring Lavender Essential Oil: Health Benefits, Uses, and Extraction Methods
Learn more about lavender essential oil, its uses and benefits for your health, here.
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What is the best organic way to get rid of moss in your lawn?
Ferrous sulfate effectively controls moss in lawns while improving grass health. This guide covers:
- Moss characteristics and affected grass types
- Specific mosses and weeds targeted
- Preparing and applying ferrous sulfate solution
- Application frequency and post-treatment care
- Fertilization with ammonium sulfate or urea for lawn recovery
The article provides step-by-step instructions for mixing and applying ferrous sulfate, including timing, method, and frequency. It also offers tips for maintaining a healthy lawn to prevent moss regrowth.
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DIY Rosemary and MSM Powder Spray to Boost Hair Growth
Learn how to make a rosemary and MSM powder spray for hair growth.
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Sweet Dreams in a Glass: The Sleepy Girl Mocktail Recipe
Make the popular tart cherry juice mocktail.
