CAL-MAG · Calcium · magnesium
Stop the spots.
Rusty spots, curled tips, pale new growth — classic calcium and magnesium hunger, and it’s common in coco and under LED. CAL-MAG corrects it and keeps cell walls and chlorophyll where they should be.
Australian-made · 26 years in the US · N-P-K 6.8–0–0
Why it matters
The most common deficiency.
Coco, soft water and hard LED light all pull calcium and magnesium down fast. Left short, the plant stalls and marks up. Cal-Mag keeps it topped up.
Calcium
Builds strong cell walls — the plant’s structure and transport.
Magnesium
The core of chlorophyll — green leaves and photosynthesis.
Clean new growth
Heads off tip burn, spotting and pale tops before they start.
How CAL-MAG works
Two minerals, big jobs.
Calcium and magnesium, and why coco and LED growers can’t skip them.
Calcium Cell walls
Builds firm cell walls and supports nutrient transport.
Magnesium Chlorophyll
The central atom of chlorophyll — drives photosynthesis.
Corrects fast Deficiency fix
Tops up the two minerals coco and soft water strip out.
Prevents, not just fixes Insurance
Run it steady and the deficiency never shows up.
Why growers run it
Skip it vs. run it.
No Cal-Mag
✗
Coco and soft water run short fast.
✗
Rust spots and curled tips show up.
✗
New growth goes pale and slow.
✗
You’re always chasing the problem.
With CAL-MAG
✓
Calcium and magnesium kept topped up.
✓
Clean leaves, no spotting.
✓
Strong, green new growth.
✓
Prevented, not chased.
A little goes a long way
1 L → 1,000 L
of finished feed at 1 ml/L — cheap insurance against the most common deficiency in the tent.
Proof — label & MSDS
Straight off the label.
N – P – K
6.8 · 0 · 0
Type
Calcium magnesium supplement
Dose
1 ml/L
Made in
Australia
Proprietary mineral + organic blend
100% biodegradable
pH 8–10
By Agricultural Organics, South Australia
N-P-K from the product label. Composition and properties from the manufacturer MSDS.
When to use it
Every feed. Especially coco.
Seedling
Veg
Flower
Late flower
Flush
Soil / coco / hydro, every feed1 ml/L
Coco & soft water especiallyevery feed
At first sign of spottingas needed
Stop the spots.
Keep it green.
Shop CAL-MAG →
Or DM FEED CHART to @bloom_crew_nate for your full feed schedule.