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Heavy 16 Fire - Green Thumb Depot
Heavy 16 Fire

Heavy 16 Fire

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SKU: H161037FR500

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Heavy 16 Fire

HEAVY 16 Fire is a premium phosphorus and potassium bloom supplement engineered to enhance flowering performance and overall plant vigor. Crafted through a unique brewing and aging process, it delivers cascading phosphorus availability throughout bloom while improving nutrient uptake and root resilience. Compatible with any feeding program, Fire simplifies bloom nutrition while supporting higher yields and genetic expression.

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

Advanced P/K Bloom Nutrition with Cascading Delivery™

HEAVY 16 Fire combines multiple forms of phosphorus and potassium with ammonium nitrogen and cold-processed kelp to optimize nutrient assimilation, root development, and flowering intensity from late veg through harvest.

  • High P/K formula (1-10-16) for bloom support
  • Three forms of phosphorus including phosphite (PO3)
  • Three forms of potassium for balanced uptake
  • Ammonium nitrogen enhances phosphorus assimilation
  • Cold-processed kelp blend supports natural flowering
  • Compatible with any nutrient program or medium

Maximize Bloom Potential, Simplify Feeding

HEAVY 16 Fire is designed for growers seeking enhanced flower development without complex nutrient stacking. Its brewed formulation improves soil and nutrient conditions, strengthens root systems, and supports consistent phosphorus delivery, helping plants reach their full yield and quality potential.

Why HEAVY 16?

HEAVY 16 is known for hand-crafted, science-driven nutrient formulations built on strict nutritional chemistry and biological principles. Their brewed, aged products prioritize nutrient availability, system compatibility, and simplicity—allowing growers to achieve professional results with fewer bottles and greater consistency.

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 stage of growth should HEAVY 16 Fire be used?
Fire can be started in the last 1–2 weeks of vegetative growth and used throughout the entire bloom cycle.
Can HEAVY 16 Fire be used with any nutrient line?
Yes, Fire is designed to integrate seamlessly into any existing nutrient program.
What makes Fire different from standard P/K boosters?
Fire is brewed and aged rather than simply blended, creating superior nutrient synergy and availability.
Does Fire improve root development?
Yes, when used in late veg, Fire supports larger, more resilient root mass.
Is HEAVY 16 Fire organic?
It provides organic matter and kelp extracts but is best described as a hybrid mineral-based supplement.
What role does phosphite play in this formula?
Phosphite (PO3) enhances phosphorus efficiency and supports bloom performance.
Is HEAVY 16 Fire suitable for soil, coco, and hydro systems?
Yes, Fire can be used across soil, coco, and hydroponic growing systems.

Specifications

HEAVY 16 Fire
Product Name HEAVY 16 Fire Bloom Nutrient
SKU H161039FR4
NPK Ratio 1 – 10 – 16
Size 16 oz, 32 oz, 1 gal, 2.5 gal, 6 gal, 15 gal, 55 gal
UPC 728028199246
Shipping Weight 11.78 lbs

What is included?

It includes:

  • HEAVY 16 Fire Bloom Booster – 1 Gallon
  • Factory-Sealed Container

Warranty Policy

Please check out the manufcaturers website for Warranty related issues.

Heavy 16 Fire

Let Us Optimize Your Nutrient Costs

Bulk pricing and freight costs can swing dramatically depending on volume and location. Share your requirements below and our team will design a custom quote that minimizes shipping and maximizes value.

Note: This information is used to understand purchasing patterns and plan logistics.
img

Heavy 16 Fire

HEAVY 16 Fire is a premium phosphorus and potassium bloom supplement engineered to enhance flowering performance and overall plant vigor. Crafted through a unique brewing and aging process, it delivers cascading phosphorus availability throughout bloom while improving nutrient uptake and root resilience. Compatible with any feeding program, Fire simplifies bloom nutrition while supporting higher yields and genetic expression.

Product Overview

Specifications

What's Included?

Warranty & Returns

Product Overview

HEAVY 16 Fire combines multiple forms of phosphorus and potassium with ammonium nitrogen and cold-processed kelp to optimize nutrient assimilation, root development, and flowering intensity from late veg through harvest.

Key Features:
1. High PK bloom
2. Triple phosphorus forms
3. Triple potassium forms
4. Ammonium boosts P
5. Cold kelp flowering
6. Universal program compatible

wetanddry
wetanddry

Core Benefits and Bloom-Phase Performance of HEAVY 16 Fire

HEAVY 16 Fire is a precision-crafted P/K bloom enhancer designed to elevate flower development, yield potential, and overall plant vitality. Built on advanced nutritional chemistry and biological principles, Fire delivers multiple forms of phosphorus and potassium, supported by ammonium nitrogen and cold-processed kelp, to improve nutrient assimilation and support natural flowering responses. Its brewed, aged formulation allows it to integrate seamlessly into virtually any feeding program, simplifying bloom supplementation while helping plants express stronger structure, healthier roots, and the full quality potential encoded in their genetics.

Bloom Nutrition Power

Organic Root Support

Soil Performance Boost

Universal System Fit

Available in Different Sizes

How to Use

1. Seedlings/Cuttings: Introduce only after plants are well rooted and established.

2. General Use: Incorporate into your normal feeding program to enhance bloom nutrition.

3. Timing: Begin in late veg and continue through the flowering cycle with a gradual increase.

4. Application Method: Apply through irrigation systems or standard reservoir feeding.

5. System Types: Suitable for soil, soilless, hydroponic, and recirculating systems.

6. Mix Order: Add Fire to water first, followed by base nutrients and supplements.

7. Shake Well: Mix thoroughly before each use.

8. Test First: Check compatibility when combining with unfamiliar products.

9. Clean & Store: Rinse equipment after use and store in a cool, dark area.

Why Heavy 16

HEAVY 16 is known for hand-crafted, science-driven nutrient formulations built on strict nutritional chemistry and biological principles. Their brewed, aged products prioritize nutrient availability, system compatibility, and simplicity, allowing growers to achieve professional results with fewer bottles and greater consistency.

wetanddry
wetanddry
wetanddry

Why Choose 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.

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


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FAQ Section

What stage of growth should HEAVY 16 Fire be used?
Fire can be started in the last 1–2 weeks of vegetative growth and used throughout the entire bloom cycle.
Can HEAVY 16 Fire be used with any nutrient line?
Yes, Fire is designed to integrate seamlessly into any existing nutrient program.
What makes Fire different from standard P/K boosters?
Fire is brewed and aged rather than simply blended, creating superior nutriet synergy and availability.
Does Fire improve root development?
Yes, when used in late veg, Fire supports larger, more resilient root mass.
Is HEAVY 16 Fire organic?
It provides organic matter and kelp extracts but is best described as a hybrid mineral-based supplement.
What role does phosphite play in this formula?
Phosphite (PO3) enhances phosphorus efficiency and supports bloom performance.
Is HEAVY 16 Fire suitable for soil, coco, and hydro systems?
Yes, Fire can be used across soil, coco, and hydroponic growing systems.

Specs & Dimensions

Feed Chart PDF
Brand HEAVY 16
SKU H161039FR4
Size 16 oz, 32 oz, 1 gal, 2.5 gal, 6 gal, 15 gal, 55 gal
NPK Ratio 1 – 10 – 16
Shipping Weight 11.78 lbs
UPC 728028199246

Items in the box

HEAVY 16 Fire Bloom Booster (in selected Size)

Warranty & Returns

Please check out the manufcaturers website for Warranty related issues.

Click here for more details: Read our Return Policy

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