Knowledge / FAQ


FROM FIELD, TO GREENHOUSE, TO GROWROOM, HEAVY 16 IS THE CHIOCE FOR ELITE GROWERS EVERYWHERE.

 

NUTRIENT CALCULATOR
FOLIAR DIRECTIONS

pH:

HEAVY 16 is developed on an organic acid pH scale, as opposed to the common mineral acid pH scale. Because of its buffering or “friendliness”, organic acids allow for optimum microbial development. Hence, HEAVY PRIME is not only a microbial feed, but also naturally functioning pH regulator. To grasp the difference between organic acid and mineral acid, think of orange juice representing organic acid and battery acid representing a hard mineral acid – which is seen in most “pH down” products.

PPM:

PPM’s have long been used to gauge nutrient strength in irrigation water. While this method can still be employed, HEAVY 16 utilizes a cascading delivery system with multiple nutrients that have no charge out of the bottle and therefore won’t register on an EC or PPM meter. These neutral natural minerals have a potent nutritional value that becomes available to your plants over time. Hence, we prefer to use specific dossing increments (mL) per gallon to measure fertility versus PPM’s. You can still use the PPM/EC scale as judgment tool when auditing your water chemistry over time. Additionally, we do recommend using such measurements when assessing the hardness of your water and efficacy of your filtration system.

Oxygenating Reservoirs:

We prefer to avoid continuously churning and bubbling HEAVY 16 reservoirs to preserve the fine organic acids that, if over-stimulated, will volatilize quickly and lead to a rapid pH rise when holding a reservoir for more than a few days.

If beneficial bacteria are used in the reservoir, artificial churning and oxygenating will exacerbate the situation as most bacteria create hydroxide (pH up) as a byproduct of heightened metabolism – which is promoted via air stones, etc.. Additionally, most air pumps that power air stones draw in large amounts of CO2 from the room, which creates carbonic acid and lowers the pH.

To oxygenate correctly, simply leave a submersible pump at the bottom of the reservoir to break the surface tension and prevent stagnation. Your media or system should have more than enough aeration to functioning optimally.

Foliar Regimen:

When it comes to efficient delivery of plant nutrition, foliar application is tough to beat. HEAVY FOLIAR is engineered on principles of evolutionary biology. The natural surfactants deliver continuous nutrition and carbohydrates that last through the next foliar feeding.

HEAVY FOLIAR is highly versatile and can be used alone or with other products. Mixing HEAVY FOLIAR with HEAVY ROOTS and HEAVY FIRE allows a for a comprehensive nutritional delivery in both phases of plant development. HEAVY FOLIAR can be mixed with pesticides, fungicides, soaps or oils.

We recommend spraying every three days for optimal nutrition uptake. If you prefer to spray every day, we recommend using the HEAVY FOLIAR recipe at half strength. For best results, spray your crop from seedling up until the fourth week on flowering crops. Please note that there is no need to adjust the pH of the FOLIAR formula after mixing, but that FOLIAR should be sprayed within three days of mixing.

Calcium:

Because Calcium is directly proportional to yield, HEAVY 16 provides vast amounts of Calcium through a cascading delivery system. Calcium is a divalent cation, meaning it has two positive charges and has a tendency to stick magnetically to the negatively charged plant exterior. HEAVY 16’s multiple forms of neutralized calcium in our VEG/BUD and HEAVY FOLIAR overcomes this challenge, ensuring ample Calcium is available to the plant. The benefits to plants of ample Calcium are undeniable, which is why we encourage growers to apply HEAVY FOLIAR regularly up to the mid-flower phase.

DWC:

DWC is a highly efficient hydroponic growing method that requires advanced attention, precision, and maintenance. We recommend DWC users follow our online “Deep Water Culture” nutrient calculator.

When using HEAVY PRIME in DWC, we recommend dosing the required amount for your reservoir size over time. For example, if your reservoir calls for 70 mL of HEAVY PRIME, add 10 mL per day for seven days, versus adding 70mL all at once. This will regulate the system and provide fresh material each day, instead of overdoing it in one large dose.

  • Full-spectrum nutrition for a top notch finish 🚀

The HEAVY lineup was created with both science and growers in mind — leaning on simplicity of use, without sacrificing the complex chemistry that sets our lineup apart 🧪

Kick things off with Veg A&B — balanced macros/micros + multiple calcium and nitrogen sources that build strong structure and vascular strength from day one. Pair it with Prime to boost microbial life, improve soil chemistry, and elevate brix, aroma, and overall plant vigor.

As bloom begins, Bud A&B steps in with fast-acting P/K and enhanced trace elements for dense, high-quality flowers. Layer in Fire for a powerful late-phase P/K ramp that drives heavy stacking, resin, and true genetic expression.

Support the whole run with Foliar for direct leaf-fed calcium and micros, helping with tissue strength and stress resistance. Then close the cycle cleanly with Finish — restoring medium balance, flushing excess salts, and sharpening color, aroma, and final weight.

Strong start. Stronger finish. 💪

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #Indoor #Outdoor #CascadingDelivery
  • When it’s time to take your flowers to the next level 🔥

HEAVY FIRE is a hand-crafted P/K booster built with real nutritional chemistry behind it — brewed and aged (not just blended) to create a truly unique, balanced bloom supplement. It slides seamlessly into any nutrient program thanks to its ultra-fine minerals and natural homogenization.

Kick it on in the last 1–2 weeks of veg and ramp it through the entire bloom cycle. You’ll get early support before flower set, stronger late-phase (“Cascading”) phosphorus delivery, and all the ingredients needed for a bigger, more resilient root mass with fuller, more branched foliage 💥

Powered by three forms of phosphorus (including highly effective phosphite), three forms of potassium, and ammonium nitrogen to improve P uptake. Finished with a premium cold-processed kelp mix to naturally support blooming — it’s one bottle that simplifies your regimen and brings out the full potential locked in your plant’s genetics. 🔥🌱

#HEAVY16 #HeavyFire #Heavy16Fire #H16Fire #Flowering #GrowWithHEAVY #BigGrowerPreferred #GetBigGetHEAVY #HEAVYOnScienceLightOnPrice
  • Need some tips on how to use HEAVY Foliar? You came to the right place! 📝

HEAVY FOLIAR is highly versatile and can be used alone or with other products. Mixing HEAVY FOLIAR with HEAVY ROOTS and HEAVY FIRE allows a for a comprehensive nutritional delivery in both phases of plant development. HEAVY FOLIAR can be mixed with pesticides, fungicides, soaps or oils.

We recommend spraying every three days for optimal nutrition uptake. If you prefer to spray every day, we recommend using the HEAVY FOLIAR recipe at half strength. For best results, spray your crop from seedling up until the fourth week on flowering crops. Please note that there is no need to adjust the pH of the FOLIAR formula after mixing, but that FOLIAR should be sprayed within three days of mixing!

🌿 Mix HEAVY FOLIAR with water, adding HEAVY16 Products in order as listed on the schedule on our website

🌿 Lightly mist plants every 3 days during foliar periods. Avoid drenching foliage.

🌿 You can spray HEAVY FOLIAR lights on or off; our recommendation is to spray at first light.

🌿 Do not adjust pH of FOLIAR mixture.

🌿 Use FOLIAR mixture within 3 days of dilution with water.

🌿 An oily sheen on leaves is normal.

#HEAVYFoliar #FoliarSpray #HEAVY16 #HEAVY16Nutrients #GrowWithHEAVY #HEAVY16Stacks #Foliar #BigGrowerPreferred
  • Cheers to good food, good company, and strong roots. Happy Thanksgiving from HEAVY 16! 🍂🦃
  • The real magic starts below the surface 👀

When you run HEAVY 16, you’re not just feeding your canopy — you’re building a root system that can’t be stopped. 🌱🔥

HEAVY’s approach fuels explosive root hair production, and those tiny hairs are everything. Root hairs massively increase the plant’s absorption zone, pulling in more water, more minerals, and more energy to drive serious growth. More root hairs = more fuel for monster plants ⚡️

This isn’t just about thick roots: it’s about building a foundation that sets your entire garden up for success. A dense, aggressive root network gives your plants the power to stack heavy once they hit flower, pumping nutrients upward to support top-tier structure, aroma, and resin.

Photo from our friends over at @cannadivine a few years back! 🤟

#HEAVY16 #HEAVY16Nutrients #Roots #RootHair #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #RootGrowth
  • The most complete base nutrients in the game 🌿😎

Veg A&B delivers balanced macros + micros, multiple forms of nitrogen and calcium, and a steady nutrient release that builds strong roots, thick tissue, and a resilient structure that can handle high light and CO₂ 🌿

Bud A&B picks up right where Veg leaves off, pushing density, oil production, and overall quality with highly bioavailable P/K, premium chelators, and elevated trace elements for a true top-shelf finish 🚀

Both are crafted with HEAVY’s premium raw inputs and micro-batch blending, giving you a clean, powerful, streamlined base that works in hydro, coco, or soil — without complicating the feed chart 🤟

Use Veg A&B + Bud A&B as your foundation, stack your favorite HEAVY additives, and you’ve got everything your plants need from start to finish! 👊

Photo: @greencoasthydro_dtla 

#HEAVY16 #HEAVY16Nutrients #HEAVY16Veg #HEAVY16Bud #BigGrowerPreferred #GetBigGetHEAVY #GrowWithHEAVY
  • HEAVY 16 Foliar — protection and nutrition all in one 🌿

H16 Foliar delivers complete nutrition with multiple forms of calcium and key micronutrients, helping strengthen plant tissue, balance metabolism, and keep your canopy firing on all cylinders 🚀

Just a few reasons you’ll love it:

• Supports overall plant health + vigorous growth
• Helps correct early Ca/Mg-related issues
• Increases tolerance to heat, light, and environmental stress
• Integrates seamlessly with the full HEAVY 16 lineup

Use full-strength in veg, then lighter mists early in bloom to keep plants fortified during key growth windows! 🤟

Feed the leaves, protect the plant. Get HEAVY. 💪🌱

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #HEAVY16Foliar #FoliarSpray
  • After a long day during harvest season 😴

Even the farm dogs are feeling it 😂

(P.S. if this is your pup, let us know so we can tag you! Found in the HEAVY archives 🐶)

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigDogApproved
  • Rocking the HEAVY swag with Iron Mike 👊😎

Killer throwback shot from @cityslicker.genetics, kicking it with the legend Mike Tyson himself at a lil trade show back in the day — and repping HEAVY while he’s at it 🤜🤛

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #H16Fam
  • Riding in style 😎🤟

Dropping by farms AND shops is one of the best part of our jobs! Growing with HEAVY or selling our lineup to customers? Let us know where you are and we’d be stoked to check out your spot when we get to your area! 🤝

#Heavy16 #Heavy16Nutrients #Heavy16Fam #GetBigGetHeavy #BigGrowerPreferred
Full-spectrum nutrition for a top notch finish 🚀

The HEAVY lineup was created with both science and growers in mind — leaning on simplicity of use, without sacrificing the complex chemistry that sets our lineup apart 🧪

Kick things off with Veg A&B — balanced macros/micros + multiple calcium and nitrogen sources that build strong structure and vascular strength from day one. Pair it with Prime to boost microbial life, improve soil chemistry, and elevate brix, aroma, and overall plant vigor.

As bloom begins, Bud A&B steps in with fast-acting P/K and enhanced trace elements for dense, high-quality flowers. Layer in Fire for a powerful late-phase P/K ramp that drives heavy stacking, resin, and true genetic expression.

Support the whole run with Foliar for direct leaf-fed calcium and micros, helping with tissue strength and stress resistance. Then close the cycle cleanly with Finish — restoring medium balance, flushing excess salts, and sharpening color, aroma, and final weight.

Strong start. Stronger finish. 💪

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #Indoor #Outdoor #CascadingDelivery
Full-spectrum nutrition for a top notch finish 🚀 The HEAVY lineup was created with both science and growers in mind — leaning on simplicity of use, without sacrificing the complex chemistry that sets our lineup apart 🧪 Kick things off with Veg A&B — balanced macros/micros + multiple calcium and nitrogen sources that build strong structure and vascular strength from day one. Pair it with Prime to boost microbial life, improve soil chemistry, and elevate brix, aroma, and overall plant vigor. As bloom begins, Bud A&B steps in with fast-acting P/K and enhanced trace elements for dense, high-quality flowers. Layer in Fire for a powerful late-phase P/K ramp that drives heavy stacking, resin, and true genetic expression. Support the whole run with Foliar for direct leaf-fed calcium and micros, helping with tissue strength and stress resistance. Then close the cycle cleanly with Finish — restoring medium balance, flushing excess salts, and sharpening color, aroma, and final weight. Strong start. Stronger finish. 💪 #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #Indoor #Outdoor #CascadingDelivery
16 hours ago
View on Instagram |
1/10
When it’s time to take your flowers to the next level 🔥 HEAVY FIRE is a hand-crafted P/K booster built with real nutritional chemistry behind it — brewed and aged (not just blended) to create a truly unique, balanced bloom supplement. It slides seamlessly into any nutrient program thanks to its ultra-fine minerals and natural homogenization. Kick it on in the last 1–2 weeks of veg and ramp it through the entire bloom cycle. You’ll get early support before flower set, stronger late-phase (“Cascading”) phosphorus delivery, and all the ingredients needed for a bigger, more resilient root mass with fuller, more branched foliage 💥 Powered by three forms of phosphorus (including highly effective phosphite), three forms of potassium, and ammonium nitrogen to improve P uptake. Finished with a premium cold-processed kelp mix to naturally support blooming — it’s one bottle that simplifies your regimen and brings out the full potential locked in your plant’s genetics. 🔥🌱 #HEAVY16 #HeavyFire #Heavy16Fire #H16Fire #Flowering #GrowWithHEAVY #BigGrowerPreferred #GetBigGetHEAVY #HEAVYOnScienceLightOnPrice
3 days ago
View on Instagram |
2/10
Need some tips on how to use HEAVY Foliar? You came to the right place! 📝

HEAVY FOLIAR is highly versatile and can be used alone or with other products. Mixing HEAVY FOLIAR with HEAVY ROOTS and HEAVY FIRE allows a for a comprehensive nutritional delivery in both phases of plant development. HEAVY FOLIAR can be mixed with pesticides, fungicides, soaps or oils.

We recommend spraying every three days for optimal nutrition uptake. If you prefer to spray every day, we recommend using the HEAVY FOLIAR recipe at half strength. For best results, spray your crop from seedling up until the fourth week on flowering crops. Please note that there is no need to adjust the pH of the FOLIAR formula after mixing, but that FOLIAR should be sprayed within three days of mixing!

🌿 Mix HEAVY FOLIAR with water, adding HEAVY16 Products in order as listed on the schedule on our website

🌿 Lightly mist plants every 3 days during foliar periods. Avoid drenching foliage.

🌿 You can spray HEAVY FOLIAR lights on or off; our recommendation is to spray at first light.

🌿 Do not adjust pH of FOLIAR mixture.

🌿 Use FOLIAR mixture within 3 days of dilution with water.

🌿 An oily sheen on leaves is normal.

#HEAVYFoliar #FoliarSpray #HEAVY16 #HEAVY16Nutrients #GrowWithHEAVY #HEAVY16Stacks #Foliar #BigGrowerPreferred
Need some tips on how to use HEAVY Foliar? You came to the right place! 📝 HEAVY FOLIAR is highly versatile and can be used alone or with other products. Mixing HEAVY FOLIAR with HEAVY ROOTS and HEAVY FIRE allows a for a comprehensive nutritional delivery in both phases of plant development. HEAVY FOLIAR can be mixed with pesticides, fungicides, soaps or oils. We recommend spraying every three days for optimal nutrition uptake. If you prefer to spray every day, we recommend using the HEAVY FOLIAR recipe at half strength. For best results, spray your crop from seedling up until the fourth week on flowering crops. Please note that there is no need to adjust the pH of the FOLIAR formula after mixing, but that FOLIAR should be sprayed within three days of mixing! 🌿 Mix HEAVY FOLIAR with water, adding HEAVY16 Products in order as listed on the schedule on our website 🌿 Lightly mist plants every 3 days during foliar periods. Avoid drenching foliage. 🌿 You can spray HEAVY FOLIAR lights on or off; our recommendation is to spray at first light. 🌿 Do not adjust pH of FOLIAR mixture. 🌿 Use FOLIAR mixture within 3 days of dilution with water. 🌿 An oily sheen on leaves is normal. #HEAVYFoliar #FoliarSpray #HEAVY16 #HEAVY16Nutrients #GrowWithHEAVY #HEAVY16Stacks #Foliar #BigGrowerPreferred
5 days ago
View on Instagram |
3/10
Cheers to good food, good company, and strong roots. Happy Thanksgiving from HEAVY 16! 🍂🦃
Cheers to good food, good company, and strong roots. Happy Thanksgiving from HEAVY 16! 🍂🦃
1 week ago
View on Instagram |
4/10
The real magic starts below the surface 👀

When you run HEAVY 16, you’re not just feeding your canopy — you’re building a root system that can’t be stopped. 🌱🔥

HEAVY’s approach fuels explosive root hair production, and those tiny hairs are everything. Root hairs massively increase the plant’s absorption zone, pulling in more water, more minerals, and more energy to drive serious growth. More root hairs = more fuel for monster plants ⚡️

This isn’t just about thick roots: it’s about building a foundation that sets your entire garden up for success. A dense, aggressive root network gives your plants the power to stack heavy once they hit flower, pumping nutrients upward to support top-tier structure, aroma, and resin.

Photo from our friends over at @cannadivine a few years back! 🤟

#HEAVY16 #HEAVY16Nutrients #Roots #RootHair #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #RootGrowth
The real magic starts below the surface 👀 When you run HEAVY 16, you’re not just feeding your canopy — you’re building a root system that can’t be stopped. 🌱🔥 HEAVY’s approach fuels explosive root hair production, and those tiny hairs are everything. Root hairs massively increase the plant’s absorption zone, pulling in more water, more minerals, and more energy to drive serious growth. More root hairs = more fuel for monster plants ⚡️ This isn’t just about thick roots: it’s about building a foundation that sets your entire garden up for success. A dense, aggressive root network gives your plants the power to stack heavy once they hit flower, pumping nutrients upward to support top-tier structure, aroma, and resin. Photo from our friends over at @cannadivine a few years back! 🤟 #HEAVY16 #HEAVY16Nutrients #Roots #RootHair #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #RootGrowth
1 week ago
View on Instagram |
5/10
The most complete base nutrients in the game 🌿😎

Veg A&B delivers balanced macros + micros, multiple forms of nitrogen and calcium, and a steady nutrient release that builds strong roots, thick tissue, and a resilient structure that can handle high light and CO₂ 🌿

Bud A&B picks up right where Veg leaves off, pushing density, oil production, and overall quality with highly bioavailable P/K, premium chelators, and elevated trace elements for a true top-shelf finish 🚀

Both are crafted with HEAVY’s premium raw inputs and micro-batch blending, giving you a clean, powerful, streamlined base that works in hydro, coco, or soil — without complicating the feed chart 🤟

Use Veg A&B + Bud A&B as your foundation, stack your favorite HEAVY additives, and you’ve got everything your plants need from start to finish! 👊

Photo: @greencoasthydro_dtla 

#HEAVY16 #HEAVY16Nutrients #HEAVY16Veg #HEAVY16Bud #BigGrowerPreferred #GetBigGetHEAVY #GrowWithHEAVY
The most complete base nutrients in the game 🌿😎 Veg A&B delivers balanced macros + micros, multiple forms of nitrogen and calcium, and a steady nutrient release that builds strong roots, thick tissue, and a resilient structure that can handle high light and CO₂ 🌿 Bud A&B picks up right where Veg leaves off, pushing density, oil production, and overall quality with highly bioavailable P/K, premium chelators, and elevated trace elements for a true top-shelf finish 🚀 Both are crafted with HEAVY’s premium raw inputs and micro-batch blending, giving you a clean, powerful, streamlined base that works in hydro, coco, or soil — without complicating the feed chart 🤟 Use Veg A&B + Bud A&B as your foundation, stack your favorite HEAVY additives, and you’ve got everything your plants need from start to finish! 👊 Photo: @greencoasthydro_dtla #HEAVY16 #HEAVY16Nutrients #HEAVY16Veg #HEAVY16Bud #BigGrowerPreferred #GetBigGetHEAVY #GrowWithHEAVY
2 weeks ago
View on Instagram |
6/10
HEAVY 16 Foliar — protection and nutrition all in one 🌿 H16 Foliar delivers complete nutrition with multiple forms of calcium and key micronutrients, helping strengthen plant tissue, balance metabolism, and keep your canopy firing on all cylinders 🚀 Just a few reasons you’ll love it: • Supports overall plant health + vigorous growth • Helps correct early Ca/Mg-related issues • Increases tolerance to heat, light, and environmental stress • Integrates seamlessly with the full HEAVY 16 lineup Use full-strength in veg, then lighter mists early in bloom to keep plants fortified during key growth windows! 🤟 Feed the leaves, protect the plant. Get HEAVY. 💪🌱 #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #HEAVY16Foliar #FoliarSpray
2 weeks ago
View on Instagram |
7/10
After a long day during harvest season 😴

Even the farm dogs are feeling it 😂

(P.S. if this is your pup, let us know so we can tag you! Found in the HEAVY archives 🐶)

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigDogApproved
After a long day during harvest season 😴 Even the farm dogs are feeling it 😂 (P.S. if this is your pup, let us know so we can tag you! Found in the HEAVY archives 🐶) #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigDogApproved
2 weeks ago
View on Instagram |
8/10
Rocking the HEAVY swag with Iron Mike 👊😎

Killer throwback shot from @cityslicker.genetics, kicking it with the legend Mike Tyson himself at a lil trade show back in the day — and repping HEAVY while he’s at it 🤜🤛

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #H16Fam
Rocking the HEAVY swag with Iron Mike 👊😎 Killer throwback shot from @cityslicker.genetics, kicking it with the legend Mike Tyson himself at a lil trade show back in the day — and repping HEAVY while he’s at it 🤜🤛 #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #H16Fam
3 weeks ago
View on Instagram |
9/10
Riding in style 😎🤟 Dropping by farms AND shops is one of the best part of our jobs! Growing with HEAVY or selling our lineup to customers? Let us know where you are and we’d be stoked to check out your spot when we get to your area! 🤝 #Heavy16 #Heavy16Nutrients #Heavy16Fam #GetBigGetHeavy #BigGrowerPreferred
3 weeks ago
View on Instagram |
10/10

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