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Your Ultimate CalMag Booster
Introducing Calnesium, a powerful CalMag booster designed to enhance both Calcium and Magnesium availability to your plants. Formulated with a robust blend of Nitrogen, Calcium, and Magnesium, Calnesium is specifically crafted to provide an additional nutrient boost to our Future Harvest Holland Secret 3 Part fertilizer. As an essential mineral supplement, Calnesium is a must-have for any grower.
Prevent End Rot and Boost Your Plants
Calnesium is an excellent additive for preventing end rot on tomatoes and peppers. Its CalMag formula is 100% compatible with all high-quality nutrients, mixing quickly and easily. Calcium, Magnesium, and Iron are crucial to photosynthesis and maintaining the structure of the plant. Calnesium works as part of your feed program and as a foliar spray.
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AVAILABLE SIZES

Key Features
- Designed for Holland Secret: Calnesium's CalMag formula is crafted to be used with Holland Secret Grow and Micro.
- Prevents Blossom End Rot: Provides additional Calcium and increases nutrient uptake, inhibiting blossom end rot.
- Strengthens Plant Cells: Enhances plant cell and tissue strength for increased resistance to stress.
- Promotes Growth: Increases cell division and plant tissue development.
- Enhances Flower and Fruit Sets: Boosts flower and fruit development.
- Improves Uptake: Increases water, nutrient, and carbon dioxide uptake.
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GUARANTEED ANALYSIS

The Benefits of a CalMag Booster
Calnesium is an essential CalMag booster, designed to enhance Calcium and Magnesium availability, essential for photosynthesis and maintaining the structure of the plant. Calnesium is your go-to solution for preventing end rot and strengthening your plants.
Experience the Calnesium Difference
Calnesium is trusted by growers worldwide for its powerful CalMag boosting properties. It's more than just calcium for plants; it's a comprehensive plant mineral booster. As a calcium magnesium solution, Calnesium is an essential part of any nutrient program. Experience the difference for yourself and discover why Calnesium is the ultimate CalMag booster. Pick up some Calnesium today and achieve the growth you're looking for!
Downloads and Schedules
For more information on how to use Calnesium, please refer to our Downloads and Schedules tab.
For foliar spray recipes that include Calnesium, simply click here to go our blog article on foliar spray recipes.
Customer Reviews
Disclaimer
The values provided on these feeding charts are meant as a general growing guide.Results may vary based on such factors as genetics, environment, and water quality.It is up to the end user to make the necessary adjustments based upon their individual situation.
Fine-Tune your Feed - Click To Explore Our Nutrient Calculator
FEED SCHEDULES AND GROW GUIDES |
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FUTURE HARVEST 8 WEEK FEED SCHEDULE: SOIL (mL per gallon) An 8 week liquid feed schedule used for: Soil, COCO, and Soil-less growing mediums. Click here to Download PDF |
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FUTURE HARVEST 8 WEEK FEED SCHEDULE: HYDRO (mL per gallon) An 8 week liquid feed schedule used for: a hydroponic growing system. Click here to Download PDF |
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FUTURE HARVEST 8 WEEK POWDER FEED SCHEDULE: SOIL (grams per gallon) An 8 week powder feed schedule used for: Soil, COCO, and Soil-less growing mediums. Click here to Download PDF |
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FUTURE HARVEST 8 WEEK POWDER FEED SCHEDULE: SOIL (tsp per gallon) An 8 week powder feed schedule used for: Soil, COCO, and Soil-less growing mediums. Click here to Download PDF |
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EASY PLUS SERIES APPLICATION GUIDE The Easy Plus Series application guide. Used for: Soil, COCO, and Soil-less growing mediums. Click here to Download PDF |
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EASY PLUS SERIES GROW GUIDE An easy to understand grow guide on using our Easy Plus Series powders. Click here to Download PDF |
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FUTURE HARVEST 8 WEEK AUTO-FLOWER FEED SCHEDULE An 8 week liquid feed schedule specifically designed for auto-flowering plants. Click here to Download PDF |
Take a look at our Media Kit. Loaded with all of our product photos, marketing materials, and our latest Product Catalogue!
If you are having troubles understanding the Feed Schedules, check out this Blog Article!

SAFETY DATA SHEETS / CERTIFICATES OF ANALYSIS
SDS | COA | LABEL / PDS | |
HOLLAND SECRET - MICRO | EN / FR | COA | LABEL / PDS |
HOLLAND SECRET - GROW | EN / FR | COA | LABEL / PDS |
HOLLAND SECRET - BLOOM | EN / FR | COA | LABEL / PDS |
CALNESIUM
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EN / FR | COA | LABEL / PDS |
PLANTACILLIN
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EN / FR | COA | LABEL / PDS |
HARD WATER MICRO
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EN / FR | COA | LABEL / PDS |
EASY GROW PLUS | EN / FR | COA | LABEL / PDS |
EASY BLOOM PLUS | EN / FR | COA | LABEL / PDS |
SUPER B+ | EN / FR | COA | LABEL / PDS |
ROYAL GOLD | EN / FR | COA | LABEL / PDS |
ROYAL BLACK | EN / FR | COA | LABEL / PDS |
PROP-O-GATOR | EN / FR | COA | LABEL / PDS |
CARBO BLAST | EN / FR | COA | LABEL / PDS |
BUD START | EN / FR | COA | LABEL / PDS |
TON O BUD | EN / FR | COA | LABEL / PDS |
BUD BOOM | EN / FR | COA | LABEL / PDS |
SILICA UP | EN / FR | COA | LABEL / PDS |
pH UP | EN / FR | COA | LABEL / PDS |
pH DOWN | EN / FR | COA | LABEL / PDS |
ORGANICAL MAGIC | EN / FR | LABEL / PDS | |
SURGE PLUS | EN / FR | COA | LABEL / PDS |
CARBO BLAST POWDER | EN / FR | LABEL / PDS | |
BUD START POWDER | EN / FR | LABEL / PDS | |
TON O BUD POWDER | EN / FR | LABEL / PDS | |
BUD BOOM POWDER | EN / FR | LABEL / PDS | |
PLANT FLUSH | EN / FR | LABEL / PDS | |
CITRIC DOWN | EN | LABEL / PDS | |
ISOPROPANOL 99% | EN | LABEL | |
H2O2 29% | EN | LABEL / PDS | |
SUCK IT UP | EN | LABEL | |
VEG BOOM PLUS | EN | LABEL | |
NUTRADIP pH4 | EN | LABEL | |
NUTRADIP pH7 | EN | LABEL | |
NUTRADIP 1000PPM | EN | LABEL | |
VGC - COMMON | EN | LABEL | |
VGC - GROW | EN | LABEL | |
VGC - BLOOM | EN | LABEL |