• Wear gloves and eye protection when handling dry powder or concentrated solutions
• Avoid inhaling dust — use in well-ventilated areas or wear a dust mask when measuring
• Wash hands thoroughly after handling

• Store in a cool, dry place in the original sealed container
• Product is hygroscopic — it will absorb moisture from the air if exposed, causing clumping
• If product clumps, simply break it up — efficacy is not affected
• Keep out of direct sunlight and away from heat sources
• Keep away from children and pets

• Do not mix dry fertilizer with other products before dissolving in water
• Always add Cal-Mag Plus to reservoir first, then add this fertilizer separately
• Avoid direct contact with plant stems and foliage when applying to soil
• Water thoroughly after soil application to prevent root burn
• Do not foliar spray during peak sun hours or when temperatures exceed 85°F

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

Refer to the Safety Data Sheet (SDS) for complete safety information.

Adequate potassium is the nutritional foundation for sweeter berries. The 32% potassium content can support sugar movement to developing fruit, which may help improve Brix levels when other growing conditions are also well managed. Beyond nutrition, ensure 6-8 hours of direct sunlight, maintain consistent moisture leading up to harvest (avoid overwatering near ripening but do not stress plants), and pick fully ripe berries in the morning. Cool nights before harvest can also contribute to better flavor. For a deeper understanding, see our article on What's the Function of Potassium (K) in Plants? For a complete nutrition guide, see What is the Best Fertilizer for Strawberries?

Strawberries prefer slightly acidic conditions. For soil growing, maintain pH 5.8–6.5. For hydroponics, adjust pH by growth stage: establishment at 5.8–6.2, vegetative growth at 5.6–6.0, and flowering/fruiting at 5.6–6.0. Always check pH after mixing nutrients, as fertilizer addition will change the solution pH.

Yes — our formula dissolves completely and works in vertical hydroponic towers, NFT systems, DWC, and Dutch buckets. For flowering and fruiting, use 0.5–0.6 lbs per 100 gallons of reservoir, maintain EC at 1.4–1.6 (700–800 PPM @ 500-scale / 980–1,120 PPM @ 700-scale), keep pH at 5.6–6.0, and always add Cal-Mag Plus at 1,000–1,500 ml per 100 gal. Check EC daily since towers evaporate faster, and top off with plain pH-adjusted water — not nutrient solution — when EC rises. On RO water, add Calcium Nitrate at 0.15–0.30 lbs per 100 gal for fruit firmness.

Everbearing varieties need consistent nutrition for continuous production: start at half strength weekly during spring establishment, increase to full strength for the first crop, reduce to half strength between crops, return to full strength for the second crop, and taper to biweekly in fall. Never skip feeding during active fruiting, and increase Cal-Mag Plus during peak production.

Calcium and phosphorus are chemically incompatible in the same solution — when mixed, they form insoluble calcium phosphate that precipitates out and becomes unavailable to plants. That's why any high-phosphorus fertilizer must be supplemented with a separate calcium source. For more on why calcium matters, see our article on Why Calcium is Crucial for Plant Growth.

Recommended calcium sources:

• Cal-Mag Plus 2-0-0 — best for hydroponic systems and container growing
• Calcium Nitrate 15.5-0-0 — water-soluble option with a small nitrogen boost
• Gypsum (Calcium Sulfate) — excellent calcium source that won't alter soil pH
• Bone Meal 3-15-0 — slow-release organic calcium and phosphorus for soil gardens

Our fertilizer is hygroscopic — it absorbs moisture from the air. Keep the bag sealed tight between uses and store in a cool, dry place out of direct sunlight. If the powder clumps, simply break it up. Clumping does not affect the product's efficacy or nutrient content.

This formula is optimized and formulated specifically for strawberries. Do not use it as a general berry fertilizer — blueberries require a very different program (pH 4.5–5.5, ammoniacal nitrogen) and caneberries such as raspberries and blackberries have their own requirements. For strawberry-specific guidance, see our complete article on What is the Best Fertilizer for Strawberries?

• Family-owned and operated since 1989 — over 35 years of fertilizer manufacturing expertise
• Manufactured in Madera, California, USA
• Tested by independent third-party laboratories for purity and guaranteed analysis
• Registered with the California Department of Food and Agriculture (CDFA)
• Independently tested for heavy metal content with results consistently well below required limits
• Solution-grade raw materials selected for maximum solubility and plant availability

If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund. No questions asked.

We're committed to sustainable practices, including:

• Recyclable packaging materials
• Precise nutrient formulation to reduce environmental runoff
• Support for integrated pest management (IPM) practices
• Promoting water-efficient growing methods including hydroponics

1% of all profits go to our foundation, focused on improving educational opportunities for children in agricultural communities.