House & Garden CalMag Calcium & Magnesium Powder Supplement, 5 lb

Calcium and magnesium support for filtered-water feeding, 5 lb

Growers who use filtered or reverse osmosis water, or inert media such as coco coir, often see calcium and magnesium run short. House & Garden CalMag is a dry soluble powder that adds both minerals to your nutrient solution so you can address those gaps. It carries a 12-0-0 analysis, so it also supplies nitrogen.

The 5 lb container suits growers who want to stock a dependable supplement for regular indoor cultivation without committing to a bulk drum. It also gives a small commercial room enough to run across several feeding cycles.

Key Features & Benefits

• Dry soluble powder — mixes into your nutrient reservoir and stores compactly.
• Calcium and magnesium in one product — covers two secondary nutrients with a single additive.
• 12-0-0 analysis — adds nitrogen with no phosphorus or potassium, so you can account for it in your feed plan.
• Fits several systems — used in hydroponic systems, coco coir and indoor setups.
• 5 lb container — sold each, with a feed chart and safety data sheet available from the manufacturer.

Who Should Use House & Garden CalMag

Use it if you feed with low-mineral water, grow in coco coir, or run recirculating hydroponic systems and need to supplement calcium and magnesium during vegetative growth and flowering. It suits both licensed commercial operations and home gardeners.

About House & Garden CalMag

House & Garden CalMag (product code HGCM05LB) is a dry nutrient supplement with a 12-0-0 NPK analysis, sold as a single 5 lb unit. Its packaged dimensions are 9 in long, 4.5 in wide and 11 in high, and it ships at 5 lb. The manufacturer publishes feed charts and a safety data sheet for it.

Frequently Asked Questions

Q: Why would I add a calcium and magnesium supplement?
A: Filtered and reverse osmosis water contain few minerals, and coco coir can hold onto calcium and magnesium. A supplement restores those nutrients to the feed solution. Check your plants and water to see whether you need it.

Q: What does 12-0-0 mean?
A: These three numbers are the nitrogen, phosphorus and potassium content of the product. CalMag contains nitrogen only, with no phosphorus or potassium. Count that nitrogen when you total your feed program.

Q: How is a powder different from a liquid supplement?
A: A dry powder is lightweight to store and you dissolve it as needed. A liquid is premixed and ready to measure. Choose by how you prefer to handle and store your inputs.

Q: How should I mix it?
A: Dissolve the powder in water before it reaches your plants, and do not apply dry powder directly to growing media. Follow the manufacturer feed chart for rates. Use lower rates if your light, temperature, humidity or airflow are not ideal.

Q: How do I handle and store it safely?
A: Keep it out of reach of children and do not take it internally. Avoid skin and eye contact, wear protective clothing, and keep the container sealed and dry. Read the safety data sheet before use.