• Wear gloves when handling dry powder concentrates — all four products can cause skin irritation with prolonged contact
• Wear eye protection when pouring or dissolving powders to prevent dust contact
• Mix in well-ventilated areas and avoid inhaling fine dust particles
• Wash hands thoroughly with soap and water after handling any component

• Store all four products in original sealed containers in a cool, dry location
• Keep out of direct sunlight and away from heat sources above 90°F
• All components are hygroscopic — exposure to humidity will cause clumping. A clumped product is still usable; break up clumps before measuring
• Store prepared concentrates in labeled, sealed containers away from children and pets
• Do not store prepared concentrates for more than 6 months

• Always add Cal-Mag Plus to the reservoir first — adding it after other nutrients can cause calcium-phosphate precipitation
• Never pour concentrates directly into each other — always dilute into water separately
• Do not apply at rates significantly above those recommended in the feeding schedule — over-application causes salt toxicity and cannot be reversed without a full flush
• When mixing stock solutions, use water temperatures between 60–80°F for best powder dissolution

• Eye contact: Flush immediately with clean water for 15 minutes. Seek medical attention if irritation persists
• Skin contact: Wash affected area thoroughly with soap and water
• Ingestion: Do not induce vomiting. Contact Poison Control at 1-800-222-1222 or seek medical attention immediately
• Inhalation: Move to fresh air. Seek medical attention if coughing or difficulty breathing persists

Refer to the individual Safety Data Sheets for each product for complete safety information.

Always add Cal-Mag Plus first, then Micro Green, then Grow Green, then Blossom Green. Adding Cal-Mag before phosphorus-containing nutrients prevents calcium-phosphate precipitation, which can permanently lock out nutrients. Always add each concentrate to water that is already in the reservoir — never pour concentrates directly onto each other.

Yes — and coco coir growers benefit especially from this bundle because coco has a natural cation exchange capacity that binds calcium and magnesium. The Cal-Mag Plus component compensates for this directly. Run Cal-Mag Plus at the higher end of the recommended range (7.5–10 ml/gallon) during vegetative and bloom stages when growing in coco.

Target pH 5.5–6.5 for most hydroponic crops, with the lower end (5.5–6.0) preferred for fruiting crops and the upper end (6.0–6.5) acceptable for leafy greens. EC targets are stage-dependent: 0.5–0.8 for seedlings, 1.0–1.8 during vegetative growth, and 1.8–2.5 during bloom. Always measure EC before and after adding each component and adjust water volume rather than nutrient rates if your EC is high.

Cal-Mag Plus and Micro Green are used at every stage from seedling through flush. Grow Green is used during vegetative and transition stages and is reduced to zero at peak bloom. Blossom Green begins at low rates during vegetative growth and increases substantially from transition through late bloom. During the final flush, all nutrient rates are reduced significantly and plain water flushes are alternated with dilute nutrient fills.

The full bundle is formulated to produce approximately 4 gallons of concentrated stock solution total, which treats roughly 400 gallons of finished nutrient solution at mid-range rates. Actual duration depends heavily on reservoir size, change frequency, and which growth stages you're in — vegetative stages use more Grow Green, while bloom stages shift consumption toward Blossom Green. Growers with 10–20 gallon reservoirs on weekly changes typically get 2–4 complete grow cycles per bundle.

Yes — all four products are available individually: Cal-Mag Plus 2-0-0, Grow Green 4-2-6, Blossom Green 2-6-8, and Micro Green 2-0-3. Because Blossom Green is used at higher rates during bloom, it is often the first component to run low in a full cycle.

Maintaining a healthy hydroponic system requires monitoring root health alongside nutrient balance. Read our guide on preventing and treating hydroponic root rot for best practices that pair well with this bundle.

• All four products in this bundle are CDFA-registered fertilizers
• Independently tested for heavy metal content — batch records available on request
• Manufactured at our Madera, CA facility under strict quality control protocols
• Consistent guaranteed analysis on every production run

• 90-day satisfaction guarantee — if you're not happy with results, contact us for a resolution
• Unused product in original sealed packaging is eligible for return within 90 days of purchase
• Contact us at questions@greenwaybiotech.com before returning any item

• Powder format eliminates the water weight that makes liquid nutrient shipping carbon-intensive
• Packaging uses up to 90% less plastic by volume compared to equivalent liquid nutrient programs
• California-manufactured, reducing cross-country transport emissions

Greenway Biotech, Inc. has been formulating and distributing specialty fertilizers since 1989. We're a family-owned company based in Madera, CA, serving commercial growers, greenhouse operations, and serious home gardeners throughout the San Joaquin Valley and across the US.