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.

  • Don’t forget HEAVY16 can be used on seedlings and cuts! 🌱 

Found in the first column of our feed cards, or at https://www.heavy16.com/nutrient-
calculator/. As shown, values are per gallon. 

You can pretreat with this solution for increased success rates during propagation as well as feed your freshly rooted seedlings or cuts! 🌿

#ROOTS will promote root development while stopping pythium and other possible infections in its tracks! Less damping off... more growing up!

Once rooting has started the low levels of our VEG base will help maintain growth, eliminating the nutritional stress in that transition for the little ones.

#HEAVY16 #HEAVY16Nutrients #HEAVY16Roots #HEAVY16Veg #HEAVY16Finish #GrowWithHEAVY #BigGrowerPreferred
  • HEAVY results no matter what style of grow you have 🔥

We built HEAVY 16 for growers who want results without overcomplicating things. From small home gardens to full-scale grows, our clean, balanced formulas support strong roots, healthy plants, and consistent performance wherever you grow. Repping HEAVY wherever the road takes us. 🌱🚚

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY
  • Huge thanks to @indoorgardens for putting up their new HEAVY 16 rack 🙌 @indoorgardens_cleveland 

Indoor Gardens continues to rep HEAVY across their Ohio locations, and we truly appreciate the support. If you’re a grower in Ohio looking for everything you need — from nutrients and lighting to media, equipment, and expert advice: Indoor Gardens has you covered ✌️ Swing by, pick up some HEAVY, and get dialed for your next run 💪🌱

#Heavy16 #Heavy16Nutrients #IndoorGardens #GrowWithHEAVY #Ohio
  • Happy New Year HEAVY family! 🎇🎆

Another year goes by and another year ends with us reflecting on how much we appreciate your continued support — we couldn’t do it without ya! Here’s to HEAVY harvests in 2026! 👊

#Heavy16 #Heavy16Nutrients #NewYear #2026
  • Real foliar support, not just a band-aid 🌿💪

Heavy 16 Foliar was built around one idea: full-spectrum plant nutrition that actually does something. Its net-neutral chemistry allows nutrients to be rapidly absorbed through the negatively charged leaf surface, immediately reinforcing tissue strength and metabolic function—then moving through the vascular system all the way to the roots.

What makes it different?
✔️ Carbon-based nutrition that fuels photosynthesis and energy storage
✔️ High-quality Calcium that strengthens cell membranes and improves elasticity
✔️ More resilient tissue, adaptive growth, and higher-quality yields
✔️ Fewer recurring stress-related issues over the crop cycle

Heavy Foliar shines before stress hits. Spray mother plants before taking cuts, ahead of transplanting, during transitions, or before extreme heat or cold. Think of it as prepping your plants to handle what’s coming next.

And the best part? One pass does it all. Its neutral chemistry plays nicely with compost teas, biologicals, pest control products, organic oils, surfactants, and even sulfur or fungicides—saving time without sacrificing performance ⚡️
  • Happy Holidays from all of us at HEAVY! 🎄✨

As the year winds down, we just want to say thank you to every grower, partner, and supporter who trusts our nutrients and stands behind what we do! Your passion, dedication, and pursuit of better grows is what drives us to keep raising the bar.

We’re grateful to be part of your gardens and your journey. Wishing you a season filled with rest, good vibes, and big plans for the year ahead. Here’s to bigger yields in the new year 🌱💪

#HEAVY16 #HEAVY16Nutrients #Holidays #Holidays2025 #Christmas #HEAVY16Fam
  • HEAVY Finish: the final statement! 🌿

This all-natural bio-regulator transforms water at the molecular level, making it more active and able to penetrate deeply into soil and media. It balances electrochemistry by donating and receiving electrons, unlocking the full expression of your crop’s genetics 🧬

Use it in your final week to reclaim tired soils, buffer EC and pH, and purge out residual salts or heavy metals from sub-par regimens. Its natural chelating structures are lab-refined to a uniform size that cleans far deeper than typical finishing products 💦

Expect deeper color, heavier oils, and richer aromatics during flower senescence — the kind of results that elevate good runs into great ones. Some growers pair it with Heavy Prime for extra terp lift, others run it solo with pure water for a clean, powerful finish 🔥

However you use it, Heavy Finish is your go-to for the final flush that actually finishes. 💧🌱

#HeavyFinish #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #Indoor #Outdoor #Flush #FinalFlush
  • The HEAVY 16 centerpiece: PRIME 🟪🌿

Designed to elevate every stage of your crop’s life cycle, PRIME delivers more than just nutrition—it transforms the entire environment your plants thrive in:

✅ Bolsters root development
✅ Fuels microbial populations
✅ Optimizes soil & nutrient conditions
✅ Unlocks true flavor, aroma, and phenotype expression

Why juggle a dozen additives when one bottle can do it all? PRIME is the ultra-diverse liquid formulation that eliminates redundancy and amplifies results, whether you’re running aeroponics, hydro, or soil.

From richer colors and heightened flavors to higher brix levels and stronger yields, PRIME isn’t just another input—it’s the foundation that makes every other piece of your program shine ✨ 

#Heavy16 #Prime #HEAVY16Prime #H16Prime #GrowWithHeavy #CropPerformance #CultivationEssentials
  • Built different by design 💪

Our lineup isn’t about bloated feed charts or unnecessary additives. It’s a streamlined, science-driven nutrient system made with premium raw ingredients and small-batch blending for consistency you can trust. Every formula is designed for maximum bioavailability, so plants get exactly what they need, when they need it.

✔️ Balanced Veg & Bud A&B for strong structure, healthy growth, and heavy yields
✔️ Prime, Fire & Foliar deliver targeted support for roots, terpenes, and overall plant vitality
✔️ Works seamlessly in soil, coco, and hydro
✔️ Clean inputs that support both plants and beneficial microbes

Growers running HEAVY 16 consistently see stronger roots, thicker stalks, healthier plants, and better finishes: without overcomplicating the grow.

#heavy16 #heavy16nutrients #heavyonsciencelightonprice #biggrowerpreferred #growwithheavy #indoor #outdoor #heavy16stacks
  • Balanced flowering nutrition! 🤟🔥

When it comes to the flowering stage, your plants deserve nothing less than premium nutrition. HEAVY BUD A&B is built to deliver just that: a cascading flow of high-quality Calcium, micronutrients, and a proprietary Phosphorous + Potassium blend designed to push plants toward robust, top-shelf yields 🚀

Formulated with low salt-indexed ingredients, exotic trace elements, and four distinct forms of Calcium, this powerful base nutrient fuels every phase of the bloom cycle with precision and consistency. The result? Dense, resin-packed flowers and vibrant health from start to finish 🤌

Ready to take your flowering game to the next level? Use BUD A&B throughout your entire bloom cycle, following our custom nutrient schedule here at heavy16.com/nutrient-calculator 👊

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #BudAB #GrowWithHEAVY #Flowering
Don’t forget HEAVY16 can be used on seedlings and cuts! 🌱 

Found in the first column of our feed cards, or at https://www.heavy16.com/nutrient-
calculator/. As shown, values are per gallon. 

You can pretreat with this solution for increased success rates during propagation as well as feed your freshly rooted seedlings or cuts! 🌿

#ROOTS will promote root development while stopping pythium and other possible infections in its tracks! Less damping off... more growing up!

Once rooting has started the low levels of our VEG base will help maintain growth, eliminating the nutritional stress in that transition for the little ones.

#HEAVY16 #HEAVY16Nutrients #HEAVY16Roots #HEAVY16Veg #HEAVY16Finish #GrowWithHEAVY #BigGrowerPreferred
Don’t forget HEAVY16 can be used on seedlings and cuts! 🌱 Found in the first column of our feed cards, or at https://www.heavy16.com/nutrient- calculator/. As shown, values are per gallon. You can pretreat with this solution for increased success rates during propagation as well as feed your freshly rooted seedlings or cuts! 🌿 #ROOTS will promote root development while stopping pythium and other possible infections in its tracks! Less damping off... more growing up! Once rooting has started the low levels of our VEG base will help maintain growth, eliminating the nutritional stress in that transition for the little ones. #HEAVY16 #HEAVY16Nutrients #HEAVY16Roots #HEAVY16Veg #HEAVY16Finish #GrowWithHEAVY #BigGrowerPreferred
2 days ago
View on Instagram |
1/10
HEAVY results no matter what style of grow you have 🔥

We built HEAVY 16 for growers who want results without overcomplicating things. From small home gardens to full-scale grows, our clean, balanced formulas support strong roots, healthy plants, and consistent performance wherever you grow. Repping HEAVY wherever the road takes us. 🌱🚚

#HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY
HEAVY results no matter what style of grow you have 🔥 We built HEAVY 16 for growers who want results without overcomplicating things. From small home gardens to full-scale grows, our clean, balanced formulas support strong roots, healthy plants, and consistent performance wherever you grow. Repping HEAVY wherever the road takes us. 🌱🚚 #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY
4 days ago
View on Instagram |
2/10
Huge thanks to @indoorgardens for putting up their new HEAVY 16 rack 🙌 @indoorgardens_cleveland 

Indoor Gardens continues to rep HEAVY across their Ohio locations, and we truly appreciate the support. If you’re a grower in Ohio looking for everything you need — from nutrients and lighting to media, equipment, and expert advice: Indoor Gardens has you covered ✌️ Swing by, pick up some HEAVY, and get dialed for your next run 💪🌱

#Heavy16 #Heavy16Nutrients #IndoorGardens #GrowWithHEAVY #Ohio
Huge thanks to @indoorgardens for putting up their new HEAVY 16 rack 🙌 @indoorgardens_cleveland Indoor Gardens continues to rep HEAVY across their Ohio locations, and we truly appreciate the support. If you’re a grower in Ohio looking for everything you need — from nutrients and lighting to media, equipment, and expert advice: Indoor Gardens has you covered ✌️ Swing by, pick up some HEAVY, and get dialed for your next run 💪🌱 #Heavy16 #Heavy16Nutrients #IndoorGardens #GrowWithHEAVY #Ohio
6 days ago
View on Instagram |
3/10
Happy New Year HEAVY family! 🎇🎆

Another year goes by and another year ends with us reflecting on how much we appreciate your continued support — we couldn’t do it without ya! Here’s to HEAVY harvests in 2026! 👊

#Heavy16 #Heavy16Nutrients #NewYear #2026
Happy New Year HEAVY family! 🎇🎆 Another year goes by and another year ends with us reflecting on how much we appreciate your continued support — we couldn’t do it without ya! Here’s to HEAVY harvests in 2026! 👊 #Heavy16 #Heavy16Nutrients #NewYear #2026
2 weeks ago
View on Instagram |
4/10
Real foliar support, not just a band-aid 🌿💪

Heavy 16 Foliar was built around one idea: full-spectrum plant nutrition that actually does something. Its net-neutral chemistry allows nutrients to be rapidly absorbed through the negatively charged leaf surface, immediately reinforcing tissue strength and metabolic function—then moving through the vascular system all the way to the roots.

What makes it different?
✔️ Carbon-based nutrition that fuels photosynthesis and energy storage
✔️ High-quality Calcium that strengthens cell membranes and improves elasticity
✔️ More resilient tissue, adaptive growth, and higher-quality yields
✔️ Fewer recurring stress-related issues over the crop cycle

Heavy Foliar shines before stress hits. Spray mother plants before taking cuts, ahead of transplanting, during transitions, or before extreme heat or cold. Think of it as prepping your plants to handle what’s coming next.

And the best part? One pass does it all. Its neutral chemistry plays nicely with compost teas, biologicals, pest control products, organic oils, surfactants, and even sulfur or fungicides—saving time without sacrificing performance ⚡️
Real foliar support, not just a band-aid 🌿💪 Heavy 16 Foliar was built around one idea: full-spectrum plant nutrition that actually does something. Its net-neutral chemistry allows nutrients to be rapidly absorbed through the negatively charged leaf surface, immediately reinforcing tissue strength and metabolic function—then moving through the vascular system all the way to the roots. What makes it different? ✔️ Carbon-based nutrition that fuels photosynthesis and energy storage ✔️ High-quality Calcium that strengthens cell membranes and improves elasticity ✔️ More resilient tissue, adaptive growth, and higher-quality yields ✔️ Fewer recurring stress-related issues over the crop cycle Heavy Foliar shines before stress hits. Spray mother plants before taking cuts, ahead of transplanting, during transitions, or before extreme heat or cold. Think of it as prepping your plants to handle what’s coming next. And the best part? One pass does it all. Its neutral chemistry plays nicely with compost teas, biologicals, pest control products, organic oils, surfactants, and even sulfur or fungicides—saving time without sacrificing performance ⚡️
2 weeks ago
View on Instagram |
5/10
Happy Holidays from all of us at HEAVY! 🎄✨ As the year winds down, we just want to say thank you to every grower, partner, and supporter who trusts our nutrients and stands behind what we do! Your passion, dedication, and pursuit of better grows is what drives us to keep raising the bar. We’re grateful to be part of your gardens and your journey. Wishing you a season filled with rest, good vibes, and big plans for the year ahead. Here’s to bigger yields in the new year 🌱💪 #HEAVY16 #HEAVY16Nutrients #Holidays #Holidays2025 #Christmas #HEAVY16Fam
3 weeks ago
View on Instagram |
6/10
HEAVY Finish: the final statement! 🌿

This all-natural bio-regulator transforms water at the molecular level, making it more active and able to penetrate deeply into soil and media. It balances electrochemistry by donating and receiving electrons, unlocking the full expression of your crop’s genetics 🧬

Use it in your final week to reclaim tired soils, buffer EC and pH, and purge out residual salts or heavy metals from sub-par regimens. Its natural chelating structures are lab-refined to a uniform size that cleans far deeper than typical finishing products 💦

Expect deeper color, heavier oils, and richer aromatics during flower senescence — the kind of results that elevate good runs into great ones. Some growers pair it with Heavy Prime for extra terp lift, others run it solo with pure water for a clean, powerful finish 🔥

However you use it, Heavy Finish is your go-to for the final flush that actually finishes. 💧🌱

#HeavyFinish #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #Indoor #Outdoor #Flush #FinalFlush
HEAVY Finish: the final statement! 🌿 This all-natural bio-regulator transforms water at the molecular level, making it more active and able to penetrate deeply into soil and media. It balances electrochemistry by donating and receiving electrons, unlocking the full expression of your crop’s genetics 🧬 Use it in your final week to reclaim tired soils, buffer EC and pH, and purge out residual salts or heavy metals from sub-par regimens. Its natural chelating structures are lab-refined to a uniform size that cleans far deeper than typical finishing products 💦 Expect deeper color, heavier oils, and richer aromatics during flower senescence — the kind of results that elevate good runs into great ones. Some growers pair it with Heavy Prime for extra terp lift, others run it solo with pure water for a clean, powerful finish 🔥 However you use it, Heavy Finish is your go-to for the final flush that actually finishes. 💧🌱 #HeavyFinish #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #GrowWithHEAVY #Indoor #Outdoor #Flush #FinalFlush
3 weeks ago
View on Instagram |
7/10
The HEAVY 16 centerpiece: PRIME 🟪🌿

Designed to elevate every stage of your crop’s life cycle, PRIME delivers more than just nutrition—it transforms the entire environment your plants thrive in:

✅ Bolsters root development
✅ Fuels microbial populations
✅ Optimizes soil & nutrient conditions
✅ Unlocks true flavor, aroma, and phenotype expression

Why juggle a dozen additives when one bottle can do it all? PRIME is the ultra-diverse liquid formulation that eliminates redundancy and amplifies results, whether you’re running aeroponics, hydro, or soil.

From richer colors and heightened flavors to higher brix levels and stronger yields, PRIME isn’t just another input—it’s the foundation that makes every other piece of your program shine ✨ 

#Heavy16 #Prime #HEAVY16Prime #H16Prime #GrowWithHeavy #CropPerformance #CultivationEssentials
The HEAVY 16 centerpiece: PRIME 🟪🌿 Designed to elevate every stage of your crop’s life cycle, PRIME delivers more than just nutrition—it transforms the entire environment your plants thrive in: ✅ Bolsters root development ✅ Fuels microbial populations ✅ Optimizes soil & nutrient conditions ✅ Unlocks true flavor, aroma, and phenotype expression Why juggle a dozen additives when one bottle can do it all? PRIME is the ultra-diverse liquid formulation that eliminates redundancy and amplifies results, whether you’re running aeroponics, hydro, or soil. From richer colors and heightened flavors to higher brix levels and stronger yields, PRIME isn’t just another input—it’s the foundation that makes every other piece of your program shine ✨ #Heavy16 #Prime #HEAVY16Prime #H16Prime #GrowWithHeavy #CropPerformance #CultivationEssentials
3 weeks ago
View on Instagram |
8/10
Built different by design 💪 Our lineup isn’t about bloated feed charts or unnecessary additives. It’s a streamlined, science-driven nutrient system made with premium raw ingredients and small-batch blending for consistency you can trust. Every formula is designed for maximum bioavailability, so plants get exactly what they need, when they need it. ✔️ Balanced Veg & Bud A&B for strong structure, healthy growth, and heavy yields ✔️ Prime, Fire & Foliar deliver targeted support for roots, terpenes, and overall plant vitality ✔️ Works seamlessly in soil, coco, and hydro ✔️ Clean inputs that support both plants and beneficial microbes Growers running HEAVY 16 consistently see stronger roots, thicker stalks, healthier plants, and better finishes: without overcomplicating the grow. #heavy16 #heavy16nutrients #heavyonsciencelightonprice #biggrowerpreferred #growwithheavy #indoor #outdoor #heavy16stacks
4 weeks ago
View on Instagram |
9/10
Balanced flowering nutrition! 🤟🔥 When it comes to the flowering stage, your plants deserve nothing less than premium nutrition. HEAVY BUD A&B is built to deliver just that: a cascading flow of high-quality Calcium, micronutrients, and a proprietary Phosphorous + Potassium blend designed to push plants toward robust, top-shelf yields 🚀 Formulated with low salt-indexed ingredients, exotic trace elements, and four distinct forms of Calcium, this powerful base nutrient fuels every phase of the bloom cycle with precision and consistency. The result? Dense, resin-packed flowers and vibrant health from start to finish 🤌 Ready to take your flowering game to the next level? Use BUD A&B throughout your entire bloom cycle, following our custom nutrient schedule here at heavy16.com/nutrient-calculator 👊 #HEAVY16 #HEAVY16Nutrients #GetBigGetHEAVY #BigGrowerPreferred #BudAB #GrowWithHEAVY #Flowering
4 weeks ago
View on Instagram |
10/10

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