Biobizz Calmag bottles in multiple sizes on a white background

Biobizz Calmag 250 ml bottle on a white background

Biobizz Calmag 500 ml bottle on a white background

Biobizz Calmag 1 L bottle on a white background

Biobizz Calmag

Calcium + magnesium support
For soft, RO or demineralised water
Supplement only

Biobizz Calmag is the organic option for correcting calcium and magnesium gaps, especially with RO, filtered or very soft water. It fits mineral-poor water in potting soil, coco or hydro-style feeding. Dose by prevention or correction; automatic use can oversupply minerals.

Quick facts

Type: CalMag supplement
Substrates: Soil / potting mix, Coco, Hydro, and Passive semi-hydro
Dosage: 0.3-1.4 ml/L
Frequency: Weekly
Skill level: Intermediate
pH/EC: Recommended

€5,50

VAT included · plus

Please note: Most fertilizers ship separately from plants. A separate shipping fee may apply, and the final cost is calculated at checkout by order weight. Free shipping does not apply.

4.6/5 store rating · 20,000+ customers served

Tracked shipping

Biobizz Calmag fills a mineral gap in organic-style feeding. It is most relevant with soft water, coco or semi-hydro situations where calcium and magnesium need attention.

Mineral balance within Biobizz

It suits coco, semi-hydro, soft water and water-grown plants where calcium and magnesium need extra attention. It is not the first bottle for ordinary soil feeding.

When to reach for it

Use Calmag when the setup points to calcium or magnesium demand: soft water, inert media, coco, strong grow lights or visible deficiency patterns alongside an otherwise good feed plan.

Is it right for your plant?

Substrate Soil / potting mixCocoHydroPassive semi-hydro
Best for Water-grown plantsCoco-grown plantsSemi-hydro plants
Helps with Water correctionMineral balanceRegular feeding
Choose another product for complete base feedinghard-water correction

Biobizz Calmag is most relevant for coco, hydro-style growing, peat-free mixes and very soft water. It fits plants under strong lights or showing likely calcium/magnesium demand.

Hard tap-water users should treat it as a diagnostic product, not an automatic weekly extra.

What's inside:

NPK Ratio: No NPK / organic calcium and magnesium supplement
Nutrient basis: Organic Ca/Mg supplement with calcium, magnesium and humic-acid support

Biobizz Calmag is the organic-style calcium and magnesium supplement in this range. It supports mineral balance where water or coco leaves a gap.

The calcium-and-magnesium role is the key composition point, supported by humic-acid content. Add it because the water profile or medium calls for it, not by default.

How to use it

Use Biobizz Calmag 0.3-0.8 ml/L for prevention with soft or RO water, depending on growth stage and medium. For hydro or coco deficiency correction, temporary use around 1-1.4 ml/L may be needed.

Add Calmag before the main organic feed so the starting water is balanced first.

➜ A few notes before measuring, mixing or applying :

Too much CalMag can create new nutrient imbalances, so increase gradually. Look at water quality before assuming every pale leaf is a calcium or magnesium issue.

Rinse measuring tools because mineral supplements can leave residue.

Biobizz Calmag

€5,50

Frequently Asked Questions about Biobizz Calmag

When should I use Biobizz Calmag?

Use it with soft water, RO water, coco, hydro-style growing, peat-free mixes or plants under strong lights when calcium and magnesium demand is likely.

Is Biobizz Calmag a complete fertilizer?

No. It supplies calcium and magnesium, but it does not provide a balanced NPK profile. You still need a base fertilizer.

Should I use Biobizz Calmag every week?

Not automatically. Hard tap-water users often do not need extra CalMag. Use water quality, substrate and plant symptoms together before adding it regularly.

Close-up of hands measuring liquid houseplant fertilizer - Liquid fertilizer lets you control dosage and timing — ideal for semi-hydro setups and fast growers.

Fertilizing

Which Fertilizer Works Best for Your Houseplants?

Epipremnum aureum cutting, LECA, self-watering pot, water level indicator, and bottle of liquid fertilizer laid out separately on white background

Fertilizing

How to Fertilize Houseplants in Semi-Hydroponics (LECA, Pon & More)

woman with garden tools watering potted houseplant on the table at plants shop, using white metal watering can,

Plant Care

The Ultimate Guide to Watering Houseplants: Everything You Need to Know to Keep Your Indoor Garden Thriving

Experience you can count on

More than 20,000 customers, rated 4.6 out of 5 stars.

Quality first

Plants are hand-selected and checked before shipping.

Reliable shipping

Safe packaging and tracked shipping from DE and NL.

Small business

Support a small, independent, women-led family business.

Row of various potted baby plants (starter plants) on a white background

Shop Baby Plants ➜

Our Customers

rate us with 4.6 out of 5 Stars

★★★★★

Die Pflanzen waren prima verpackt und ein heatpack war im Paket enthalten. Die Lieferzeit hat 2 bis 3 Tagen gedauert, was aus meiner Sicht wirklich gut ist. Alle drei Pflanzen haben die Lieferung gut überstanden. Ich habe mich auf Hoyas spezialisiert und habe schon die nächsten Pflanzen meiner Wunschliste auf der Website gefunden. Daher wird die nächste Bestellung nicht lange auf sich warten lassen.

Marion

★★★★★

The plants are carefully packaged and arrive in great conditions (I’m based in Spain) and they’re always there to help in any way they can with your purchase.I have and will always recommend Foliage Factory to every friend I can. I’m not only satisfied with their plants and prices, but their customer service is exceptional.

José

★★★★☆

Very healthy and well packed plant. Unfortunately there was one plant that ordered couldn’t be delivered as it was out of stock hence 1 star less.

Sam

★★★★☆

Die Sendung kam leider in keinem guten Zustand bei mir an, kann passieren. Habe mich darauf hin sofort an Foliage Factory gewandt und habe selten einen so guten, schnellen, freundlichen und kulanten Kundendienst erlebt.

Frauke

★★★★★

Everything arrived in good condition and very well packed - it wasn't easy with a fragile plant and a heavy bag of substrate. I recommend it!

Lia

★★★★★

Bester online-Pflanzenhandel den ich kenne (habe davor 4 andere ausprobiert). Eine teure Pflanze wurde beim Transport beschädigt und mir ersetzt. Der Kontakt dabei war auch sehr nett (danke Jan) und hat mir gut geholfen. Die anderen Pflanzen sind in einem sehr guten Zustand, keine Schädlinge, super Bewurzelung. Nur zu empfehlen! :)

C L

★★★★★

Super Service, Gute Auswahl, Preise sind fair. Eine Pflanze kam kaputt an, hab sofort Ersatz bekommen. Danke an den unkomplizierten (und blitzschnellen) Kundenservice!!

Sarah

★★★★★

Envoie très rapide (2 jours), plantes parfaitement emballées et super offres ! Je suis une habituelle j'ai passé 6 ou 7 commandes et je n'en peut être plus satisfaite du service client et de la qualité et variété des plantes offertes

Iris

★★★★★

The plants have arrived in perfect condition, the roots and the foliage so so healthy! I had problem with 1 plant out of 16 and they have responded to my email almost instantly and the issue was resolved straight away. I'm really impressed and satisfied, definitely getting more plants from them again!

Patricija

★★★★★

I received perfectly heathy and absolutely beautiful plants, even bigger than expected. The delivery within Europe was really fast. I think Foliage Factory has one of the best plant web shops in the internet. It‘s just great to get so much informations about the plants. I will definitely order again :)

Walkerova