FoxFarm Bush Doctor Cal‑Mag Plant Supplement, 1‑Pint — OMRI Organic Liquid Cal+Mg, 1‑0‑0 (3% Ca, 0.9% Mg)

FoxFarm Bush Doctor Cal-Mag is a concentrated, OMRI-listed liquid supplement supplying supplemental calcium and magnesium to help correct deficiencies and support healthy plant growth.

Give plants the two minerals they need most for sturdy cell structure and steady development. This 1-pint bottle of FoxFarm Bush Doctor Cal-Mag delivers a 1-0-0 nutrient ratio with 3% calcium and 0.9% magnesium in a ready-to-mix liquid. It’s formulated for use in organic gardening systems and greenhouse environments and is designed to be easy to apply, greenhouse-tested for consistency, and compatible with standard feeding schedules when pH is in the ideal range.

How do I use Cal-Mag in my weekly feeding routine?

Mixing and timing are straightforward: blend 1 teaspoon (5 mL) per gallon of water and apply once a week. Start applications before bud or fruit development to supply minerals during critical growth stages. It can be used alongside base fertilizers but check compatibility and overall nutrient balance.

• Mix ratio: 1 tsp (5 mL) per gallon of water.
• Frequency: once weekly or as needed during active growth.
• Start: prior to bud/fruit set for best preventative support.
• Compatibility: use with regular feeding schedules; monitor total nutrients.

What signs indicate my plants need this calcium and magnesium supplement?

Plants showing stunted new growth, pale leaf edges, or structural weakness may be limited by calcium or magnesium. While symptoms vary by species, common cues include tip burn, weak fruit attachment, or interveinal chlorosis. Use a supplement like this to correct or prevent deficiencies while confirming pH and watering practices are correct.

• Look for tip burn or weakened tips on new leaves.
• Check for pale or mottled leaves (interveinal chlorosis).
• Observe fruit development for soft spots or poor set.
• Test soil or solution pH to ensure nutrient availability.

How does pH affect calcium and magnesium uptake?

Nutrient availability shifts with pH: calcium and magnesium are most accessible in slightly acidic to near-neutral ranges. FoxFarm recommends keeping pH between 5.6 and 6.8 for optimal absorption in soilless and soil-based systems. If pH drifts outside that band, you may see deficiency signs even when minerals are present.

• Target pH range: 5.6–6.8 for best uptake.
• Test regularly: frequent checks help maintain availability.
• Adjustments: correct pH before increasing supplement doses.
• System type: soil vs. hydro may require different pH management.

Is this product suitable for organic gardens and greenhouses?

Yes. FoxFarm Bush Doctor Cal-Mag is OMRI listed for organic production, making it appropriate for certified and home organic systems when used per label directions. The formula has been greenhouse-tested for consistency, so growers can rely on repeatable performance across applications.

• OMRI listed: compliant with many organic standards.
• Greenhouse tested for formula consistency and reliability.
• Designed for garden, greenhouse, and container plant use.
• Follow label directions for organic compliance and safe use.

Who is this product for? FoxFarm Bush Doctor Cal-Mag is targeted at home gardeners, greenhouse growers, and organic cultivators who need a dependable calcium and magnesium supplement. It suits people managing fruiting vegetables, ornamentals, and container plants that are prone to mineral imbalances, and anyone who wants a simple weekly additive to support cell strength and steady development when pH is properly managed.

Ingredients

macronutrients