Newmarket, Ontario (Head Office)
1175 Stellar Drive, Unit #5
Newmarket, ON L3Y 7B8
- Mon10:00am–6:00pm
- Tue10:00am–6:00pm
- Wed10:00am–6:00pm
- Thu10:00am–6:00pm
- Fri10:00am–6:00pm
- Sat10:00am–4:00pm
- SunClosed
Vous possédez un compte ?
Connectez-vous pour payer plus vite.
$0.00 CAD
En rupture de stock à votre point de retrait ? Nous transférerons automatiquement le stock d’un autre entrepôt afin qu’il soit disponible à votre point de retrait. (Ontario seulement)
Impossible de charger la disponibilité du service de retrait
Emerald Harvest Cal-Mag est un additif nutritif liquide pour plantes à base de calcium et de magnésium, formulé pour compléter un programme complet d'engrais de base avec du calcium (Ca) et du magnésium (Mg) supplémentaires pour la croissance végétative et la floraison.
Avec un profil NPK de 2-0-0, ce produit se positionne comme un complément plutôt que comme un engrais à utiliser seul. Sa composition inclut des sources de calcium et de magnésium minéraux telles que le nitrate d'ammonium et de calcium (sel double), le sulfate de magnésium, l'acétate de calcium et l'acétate de magnésium, ainsi qu'un extrait d'algues.
Cet additif calcium-magnésium est couramment utilisé dans la fibre de coco et autres substrats de culture lorsque les cultivateurs souhaitent ajouter du calcium et du magnésium à leurs nutriments de base. Il convient également à de nombreux systèmes de culture, notamment en terre et en hydroponie, lorsqu'un produit calcium-magnésium spécifique est utilisé.
Idéal pour les cultivateurs à la recherche d'une solution cal-mag Emerald Harvest avec une analyse simple 2-0-0, des apports de calcium et de magnésium à base de minéraux et un extrait d'algues ajouté — conçue pour s'intégrer facilement aux programmes de nutriments modernes dans de multiples styles de culture.
Step-by-step mixing and feeding instructions for Emerald Harvest Cal-Mag - 1 pinte.
Fill your reservoir or watering container with clean, room-temperature water first. Shake the bottle of Emerald Harvest Cal-Mag - 1 pinte well before every use. Using the feeding schedule below, measure the recommended dose and add it directly to the water while stirring. Allow the solution to mix fully before adding any other fertilizers, additives, or supplements.
Always add nutrients to water — not the other way around. Mix thoroughly between products to ensure an even, stable nutrient solution.
Vegetative stage — Cal-Mag
Flowering stage — Cal-Mag
Warning – Important Safety Information
This product may cause mild skin irritation and eye irritation. Avoid unnecessary contact with skin, eyes, and clothing. Use only as directed.
General safety precautions
Read and follow all instructions on the product label and any accompanying documentation before use. Keep out of reach of children and pets. Do not ingest. Avoid breathing vapours, mist, or dust that may be generated during handling or use.
Wear appropriate personal protective equipment (PPE), such as protective gloves, long sleeves, long pants and closed-toe footwear. When there is a risk of splashing or airborne particles, use safety glasses or other suitable eye and face protection.
First aid – skin contact
IF ON SKIN OR HAIR: Remove contaminated clothing immediately. Rinse skin with clean water for several minutes, then wash with mild soap and water. If irritation or redness develops and persists, seek medical attention. Wash contaminated clothing before reuse.
First aid – eye contact
IF IN EYES: Rinse cautiously with clean water for several minutes, keeping eyelids open. Remove contact lenses if present and easy to do. Continue rinsing. If irritation persists, obtain medical advice.
First aid – ingestion and inhalation
IF SWALLOWED: Rinse mouth thoroughly with water. Do not induce vomiting unless instructed by a medical professional. Seek medical attention if you feel unwell.
IF INHALED: Move the person to fresh air and keep them comfortable for breathing. If coughing, breathing difficulty, dizziness or other symptoms occur, seek medical assistance.
Storage and handling
Store this product in its original closed container, in a cool, dry and well-ventilated area. Protect from extreme temperatures and direct sunlight. Keep container tightly sealed when not in use.
Avoid release to drains, natural waterways or outdoor soil. Dispose of unused product and empty containers in accordance with local regulations and the directions on the label.
Important: If medical advice is needed, keep the product label or container available. Always follow the specific instructions and safety recommendations provided by the manufacturer. This safety notice is intended as general guidance and does not replace official label directions or documentation.
| Total Nitrogen (N) | 2.0% |
|---|---|
| Ammoniacal Nitrogen (N) | 0.1% |
| Nitrate Nitrogen (N) | 1.9% |
| Total Calcium (Ca) | 3.0% |
| Total Magnesium (Mg) | 0.5% |
| Water Soluble Magnesium (Mg) | 0.5% |
Ammoniacal Nitrogen (N) is a plant-available form of ammonium (NH₄⁺) that provides a steady, gentle source of nitrogen for healthy green growth. Unlike fast-release nitrogen types, ammoniacal nitrogen feeds plants slowly, helps stabilize root-zone pH, and works well in cooler temperatures. It is commonly used during early vegetative growth because it supports strong leaf development without burning young roots. If plants show pale leaves, slow growth, or weak stems, they may need more available ammoniacal nitrogen.
Calcium acetate is important because it can provide fast-available calcium that supports strong new growth, smooth leaf formation, and resilient roots when plants are growing quickly. It’s unique because the acetate pairing helps it dissolve and behave smoothly in solution, making it useful for fine-tuning calcium supply without relying on slow breakdown, while still requiring balanced nutrition and healthy water movement to work.
Calcium nitrate is important because it supplies calcium in a fast, highly available form that supports strong new growth and healthy root tips, while also providing nitrate nitrogen for steady, usable growth energy. It’s unique because it delivers calcium together with nitrate nitrogen, making it especially effective during rapid growth phases when plants need both structure-building calcium and immediately available nitrogen at the same time.
Nitrate Nitrogen provides a stable, easy-to-absorb form of nitrogen that supports steady growth, strong foliage, and reliable plant development without sudden nutrient swings.
Total calcium is important because it builds strong cell walls and supports healthy new growth, roots, and overall plant stability. It’s unique because plants can’t easily move calcium from old leaves to new growth, so calcium problems show up first at the tips and newest leaves when delivery through water movement and transpiration falls behind.
Total magnesium is important because magnesium powers chlorophyll and energy use, helping plants stay green, turn light into growth, and use other nutrients efficiently—and it’s unique because its problems often come from nutrient balance and uptake competition, not just a simple shortage.
Total Nitrogen is important because it directly drives leafy growth, chlorophyll production, and overall growth speed, which sets the pace for the entire plant. It’s unique because the “total” number can include different nitrogen forms that behave differently in the root zone, meaning the same total amount can produce very different results depending on the nitrogen type and plant stage.
Water soluble magnesium is important because it quickly restores the plant’s ability to make chlorophyll and produce energy, which helps stop interveinal yellowing on older leaves and improves overall nutrient use; it’s unique because it becomes available immediately in water, making it faster and more predictable than slower magnesium sources.
Kelp extract supports plant growth by acting as a biostimulant that helps roots stay active, improves stress tolerance, and encourages steadier new growth without functioning like a heavy fertilizer. It’s unique because it influences plant processes and recovery more than it supplies major nutrients, so it works best as supportive “management help” rather than a direct N-P-K replacement.
The first signs usually look like magnesium balance problems rather than something completely new: older leaves begin to pale between the veins while the veins stay greener, and growth can feel less vigorous because photosynthesis and sugar movement slow down. It’s important because catching it early protects your “solar panel” leaves, and it’s unique because magnesium acetate supplies magnesium without forcing extra nitrogen or a heavy mineral partner, so you can correct magnesium specifically without pushing the plant in a different direction.
Magnesium sulfate supplies magnesium for chlorophyll and sugar movement plus sulfur for protein building, helping plants stay efficient and green during high-demand growth. It’s unique because it adds magnesium without extra nitrogen or calcium, so it corrects magnesium issues with fewer side effects when balance is the real goal.

1175 Stellar Drive, Unit #5
Newmarket, ON L3Y 7B8
106 Saunders Road, Unit #2A
Barrie, ON L4N 9A8
719 Krosno Boulevard
Pickering, ON L1W 1G4
915 McLeod Avenue, Unit #4
Winnipeg, MB R2G 0Y4