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Joyful Tomatoes

Calcium, magnesium, and micro-nutrients to protect blossoms and grow healthy plants.

Cal-Mag UltraPure | Plus Micros

Plant and blossom power. Bloom City’s Cal-Mag UltraPure formulation contains calcium, magnesium, and a wide array of micro-nutrients to grow healthier plants. Use Cal-Mag to prevent blossom end rot in tomatoes and peppers.

  • Bloom City Cal-Mag works better because it contains more micronutrients than any other brand including iron, zinc, manganese and more.
  • Prevents common growth deficiencies at every stage of growth. Apply with every watering for the full benefit.
  • We use organic chelates and no harmful chemicals like edta. It's healthier for your garden and the planet.
  • Made in America by a small team of passionate plant scientists using only the highest quality ingredients.

What To Know

  • Love Plants

    Gorgeous Gardens

    Cal-Mag greatly improves growth and prevents nutrient deficiencies

  • For Rainforest

    More Micronutrients

    Contains more micronutrients than any other brand

  • Free Shipping

    Organic Chelates

    Made from organic chelates and no chemicals like EDTA

How It Works

Overview

Bloom City’s Cal-Mag formulation contains calcium, magnesium, and a wide array of micro-nutrients. Cal-Mag improves stalk and leaf growth and prevents common deficiencies.
It's fully compatible with all growth mediums and can even be applied as a foliar spray for rapid uptake.
Add Cal-Mag to every watering for a lush green canopy. 100% compatible with other nutrient systems, and can help make other minerals more bioavailable.

How much to use

The use rates for general growth are 2-4mL (0.5-1 tsp) per gallon in veg (when the plant is growing strong roots and leaves) and 3-5mL (0.5-1 tsp) per gallon when in bloom (when the plant is developing flowers or fruit). These use rates are meant to be applied with every watering.
If you want to water once weekly then you can increase that dosage to 10mL per gallon (2 tsp per gallon).
As a foliar spray, use 20-40mL per gallon (4-8 tsp per gallon) once weekly.

Where to use

Cal-Mag can be used on all plants.
Cal-Mag is fully compatible with any soil and all growth mediums and can even be applied as a foliar spray for rapid uptake. Add Cal-Mag to every watering for a lush green canopy.

When to apply

Apply Cal-Mag in every stage of growth for strong stalk and leaf health. Apply with every watering for the full benefit.
Cal-Mag and other watered in fertilizers should best be applied in the morning before the full heat of the day, this will help with uptake as the sun draws water up into the leaves.
If you use Cal-Mag as a foliar spray then it is best applied in the evenings, as the sun goes down the plant will pull down the minerals from the leaves and use those minerals in the body and root systems.

Types of plants

Cal-Mag can be used on all plants, including:
- Houseplants
- Greenhouse Plants
- Edible Plants (fruits and veggies)
- Trees
- Turf

Guaranteed analysis

NPK: 2 – 0 - 0
Total Nitrogen (N) ... 2%
2% Nitrate NItrogen
Calcium (Ca) .......... 2%
Magnesium (Mg) ..... 0.6%
Boron (B) ……………... 0.002%
Copper (Cu) ……….. 0.003%
Iron (Fe) ………………. 0.004%
Manganese (Mn) …. 0.004%
Zinc (Zn) ……………… 0.004%

Bloom City Product Video

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Cal-Mag UltraPure is simple to use and produces amazing results.

Bloom City’s products are made in America from the highest quality sources by a small team of passionate plant scientists. Our ingredients are better for plants, better for you, and better for the planet. See it in action.

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Product Feed Chart

Feed Chart

The use rates for general growth are 2-4mL per gallon in veg (when the plant is growing strong roots and leaves) and 3-5mL (1/2 to 1 tsp) per gallon when in bloom (when the plant is developing flowers or fruit). These use rates are meant to be applied with every watering.

If you want to water once weekly then you can increase that dosage to 10mL per gallon (2tsp per gallon). As a foliar spray, please use 20-40mL per gallon (4-8 tsp per gallon) once weekly.

What's Being Said

Frank T.Ratings

"CalMag has tripled my tomatoes not only in quantity but quality as well. I'm now using it in all my potted plants and they’ve doubled in size. I tell all my friends about it."

Lena L.Ratings

"Tried everything for my wilting baby’s and when I added this my plants perked up and are now thriving! I will be buying it again."

Chritian W.Ratings

"Ordered this and the silica and BOOM! Overnight my plants hopped right up! Ordered a bigger bottle. Easy to use, and the most affordable bottle of CalMag I've ever bought."

Joey B.Ratings

"You can’t go wrong with this one, grade A product and customer service!! The seller is great, they value their customers and are extremely knowledgeable and professional!"