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FAQ Section

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What is Cal-Max used for? \n
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Cal-Max provides calcium, magnesium, and iron to prevent and correct nutrient deficiencies during rapid growth or high temperatures.
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How is Cal-Max applied? \n
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It is applied as a foliar spray for direct nutrient absorption into leaves, making it effective even when root uptake is limited.
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Can it prevent tip burn and blossom end rot? \n
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Yes, the calcium and magnesium content helps prevent tip burn in lettuce and blossom end rot in tomatoes.
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Can it be used as a preventative? \n
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Yes, Cal-Max can be integrated into your nutrient program to avoid nutrient deficiency problems before they occur.
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What nutrient deficiencies does it address? \n
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It addresses calcium, magnesium, and iron deficiencies, especially during rapid growth or heat stress periods.
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What sizes are available? \n
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Currently available in 1 qt, 1 gal and 10L size.
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Specifications \"\"\n

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Grotek Cal-Max\"\"
Product NameGrotek Cal-Max
SKUGTCLMXGAL
Nitrogen (N)2%
Available Sizes1 qt, 1 gal and 10L
BarcodesUPC-A: 670829815125
Shipping Weight11.2 lbs
Dimensions10.2L x 16.3W x 11.3H (CS), 8.1L x 5.1W x 10.6H (EA)
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What is included? \"\"\n

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It includes:

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  • \n\"\" Grotek Cal-Max (Selected Size)\n
    • \n
  • \n\"\" User Instructions / Usage Guidelines\n
    • \n
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Warranty Policy

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Please check out the manufcaturers website for Warranty related issues.

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Grotek Cal-Max
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Grotek Cal-Max

Grotek Cal-Max

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Original: $10.95

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Grotek Cal-Max—

$10.95

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The Story

Grotek Cal-Max

Grotek Cal-Max is a foliar-applied supplement providing essential calcium, magnesium, and iron during periods of rapid growth or high temperatures. It helps prevent and correct nutrient deficiencies, supports peak plant production, and reduces issues like tip burn in lettuce or blossom end rot in tomatoes. Cal-Max enhances nutrient availability to leaves, even when root-to-leaf translocation is limited, making it an essential tool for healthy, productive crops.

  • Features & Benefits
  • Product Specifications
  • What is included?
  • Warranty Policy

Prevent Deficiencies with Cal-Max

Cal-Max delivers key nutrients directly to leaves, ensuring plants receive calcium, magnesium, and iron for optimal growth. Its foliar application helps prevent and correct deficiencies, improving overall plant health and productivity.

  • Provides calcium, magnesium, and iron for optimal plant health.
  • Prevents nutrient deficiency issues like tip burn and blossom end rot.
  • Supports peak production during rapid growth or heat stress.
  • Effective even when root-to-leaf nutrient translocation is limited.
  • Can be used preventatively as part of a nutrient program.
  • Easy to apply as a foliar spray for fast absorption.

Ensure Nutrient Balance for Maximum Yield

Grotek Cal-Max supplies essential calcium, magnesium, and iron directly to leaves, improving nutrient availability and supporting strong, healthy growth. It helps prevent deficiency-related problems, enhancing crop quality and yield.

Why Grotek?

Grotek delivers premium, science-backed fertilizers and supplements trusted by professional growers worldwide. Their products are designed for maximum nutrient uptake, consistency, and reliable results, ensuring healthier plants, stronger roots, and more productive harvests every cycle.

Why Buy From Us?

At GreenThumbDepot, you're not just another sale to a faceless corporation. You're partnering with a team genuinely invested in your success. Our legendary customer service, combined with a promise of unbeatable prices, sets us apart. We're here for you, always.

Excellent 4.8 out of 5 based on 1,247 reviews
If I could rate 6 stars I would!
If I could rate 6 stars I would! My representative Edouard B. has been shockingly responsive! Like - oh my god - an actual SERVICE oriented company. He's dug into my odd connectivity issues I've been having - and following up in an AMAZINGLY timey manner. No shit. You'll be impressed! (And the price was also unbeatable, quick shipping...it's all PERFECT). Thank you Ed!!
Reviewer
Jim D

Customer service was outstanding great…
Customer service was outstanding great people to deal with they understand your needs and they will do their best to fulfill them there is no way I can complain about them because they are the best help out there.Thanks green thumb depot. I'll definitely order from them again
Reviewer
Glenn Appleton

The machine is doing just what my…
The machine is doing just what my salesman told it would do (I appreciate you Ed thank you) . The machine is what we need for our new business we're starting up, soon to be llc and licensed. We are getting a lot of clients wanting our services. Ed I will be needing more of your products, thank you again.
Reviewer
Freddie

Fantastic
Great prices, fantastic customer service, and mind blowing shipping! Incredible. Will be using again and telling anyone in need.
Reviewer
Kar

←
→

FAQ Section

What is Cal-Max used for?
Cal-Max provides calcium, magnesium, and iron to prevent and correct nutrient deficiencies during rapid growth or high temperatures.
How is Cal-Max applied?
It is applied as a foliar spray for direct nutrient absorption into leaves, making it effective even when root uptake is limited.
Can it prevent tip burn and blossom end rot?
Yes, the calcium and magnesium content helps prevent tip burn in lettuce and blossom end rot in tomatoes.
Can it be used as a preventative?
Yes, Cal-Max can be integrated into your nutrient program to avoid nutrient deficiency problems before they occur.
What nutrient deficiencies does it address?
It addresses calcium, magnesium, and iron deficiencies, especially during rapid growth or heat stress periods.
What sizes are available?
Currently available in 1 qt, 1 gal and 10L size.

Specifications

Grotek Cal-Max
Product Name Grotek Cal-Max
SKU GTCLMXGAL
Nitrogen (N) 2%
Available Sizes 1 qt, 1 gal and 10L
Barcodes UPC-A: 670829815125
Shipping Weight 11.2 lbs
Dimensions 10.2L x 16.3W x 11.3H (CS), 8.1L x 5.1W x 10.6H (EA)

What is included?

It includes:

  • Grotek Cal-Max (Selected Size)
  • User Instructions / Usage Guidelines

Warranty Policy

Please check out the manufcaturers website for Warranty related issues.

Grotek Cal-Max - Image 2

Details & Craftsmanship

Every detail has been carefully considered to bring you the perfect product.

Grotek Cal-Max - Image 3

Details & Craftsmanship

Every detail has been carefully considered to bring you the perfect product.

Description

Grotek Cal-Max

Grotek Cal-Max is a foliar-applied supplement providing essential calcium, magnesium, and iron during periods of rapid growth or high temperatures. It helps prevent and correct nutrient deficiencies, supports peak plant production, and reduces issues like tip burn in lettuce or blossom end rot in tomatoes. Cal-Max enhances nutrient availability to leaves, even when root-to-leaf translocation is limited, making it an essential tool for healthy, productive crops.

  • Features & Benefits
  • Product Specifications
  • What is included?
  • Warranty Policy

Prevent Deficiencies with Cal-Max

Cal-Max delivers key nutrients directly to leaves, ensuring plants receive calcium, magnesium, and iron for optimal growth. Its foliar application helps prevent and correct deficiencies, improving overall plant health and productivity.

  • Provides calcium, magnesium, and iron for optimal plant health.
  • Prevents nutrient deficiency issues like tip burn and blossom end rot.
  • Supports peak production during rapid growth or heat stress.
  • Effective even when root-to-leaf nutrient translocation is limited.
  • Can be used preventatively as part of a nutrient program.
  • Easy to apply as a foliar spray for fast absorption.

Ensure Nutrient Balance for Maximum Yield

Grotek Cal-Max supplies essential calcium, magnesium, and iron directly to leaves, improving nutrient availability and supporting strong, healthy growth. It helps prevent deficiency-related problems, enhancing crop quality and yield.

Why Grotek?

Grotek delivers premium, science-backed fertilizers and supplements trusted by professional growers worldwide. Their products are designed for maximum nutrient uptake, consistency, and reliable results, ensuring healthier plants, stronger roots, and more productive harvests every cycle.

Why Buy From Us?

At GreenThumbDepot, you're not just another sale to a faceless corporation. You're partnering with a team genuinely invested in your success. Our legendary customer service, combined with a promise of unbeatable prices, sets us apart. We're here for you, always.

Excellent 4.8 out of 5 based on 1,247 reviews
If I could rate 6 stars I would!
If I could rate 6 stars I would! My representative Edouard B. has been shockingly responsive! Like - oh my god - an actual SERVICE oriented company. He's dug into my odd connectivity issues I've been having - and following up in an AMAZINGLY timey manner. No shit. You'll be impressed! (And the price was also unbeatable, quick shipping...it's all PERFECT). Thank you Ed!!
Reviewer
Jim D

Customer service was outstanding great…
Customer service was outstanding great people to deal with they understand your needs and they will do their best to fulfill them there is no way I can complain about them because they are the best help out there.Thanks green thumb depot. I'll definitely order from them again
Reviewer
Glenn Appleton

The machine is doing just what my…
The machine is doing just what my salesman told it would do (I appreciate you Ed thank you) . The machine is what we need for our new business we're starting up, soon to be llc and licensed. We are getting a lot of clients wanting our services. Ed I will be needing more of your products, thank you again.
Reviewer
Freddie

Fantastic
Great prices, fantastic customer service, and mind blowing shipping! Incredible. Will be using again and telling anyone in need.
Reviewer
Kar

←
→

FAQ Section

What is Cal-Max used for?
Cal-Max provides calcium, magnesium, and iron to prevent and correct nutrient deficiencies during rapid growth or high temperatures.
How is Cal-Max applied?
It is applied as a foliar spray for direct nutrient absorption into leaves, making it effective even when root uptake is limited.
Can it prevent tip burn and blossom end rot?
Yes, the calcium and magnesium content helps prevent tip burn in lettuce and blossom end rot in tomatoes.
Can it be used as a preventative?
Yes, Cal-Max can be integrated into your nutrient program to avoid nutrient deficiency problems before they occur.
What nutrient deficiencies does it address?
It addresses calcium, magnesium, and iron deficiencies, especially during rapid growth or heat stress periods.
What sizes are available?
Currently available in 1 qt, 1 gal and 10L size.

Specifications

Grotek Cal-Max
Product Name Grotek Cal-Max
SKU GTCLMXGAL
Nitrogen (N) 2%
Available Sizes 1 qt, 1 gal and 10L
Barcodes UPC-A: 670829815125
Shipping Weight 11.2 lbs
Dimensions 10.2L x 16.3W x 11.3H (CS), 8.1L x 5.1W x 10.6H (EA)

What is included?

It includes:

  • Grotek Cal-Max (Selected Size)
  • User Instructions / Usage Guidelines

Warranty Policy

Please check out the manufcaturers website for Warranty related issues.

Grotek Cal-Max | Green Thumb Depot