USDA BioPreferred Certified
Feed the plant. Dominate the harvest.
GroMax feeds the leaves. RootMax builds the roots. Together they delivered +40.7% more yield in a 49-day indoor trial.
Bundle $99.99 · FREE 8 oz Odor Max included ($12.99 value)
- Free shipping
- 30-day money-back
- USDA BioPreferred
Proven results
The numbers behind Grow Max and Odor Max.
- Grow Max+40.7% More yield49-day indoor trial · 18 vs 18 plantsSee the study
- Grow Max+51% Tomato yieldField trial, Philippines · 35 → 53 t/haSee the study
- Nano Odor Max60 sec Odor goneNano Odor Max, in most casesHow it works
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Every order30-day Money-back guaranteePlus free shipping on every order
Yield figures are from the trials on The Research page. Individual results vary.
Meet the system
Leaves above. Roots below. Both at once.
Two nano-sized formulas, one routine. Each works alone. Together they cover the whole plant.
Leaves · above the soil
GroMax
Foliar spray. Feeds the canopy through the leaves.$54.99
Roots · below the soil
RootMax
Soil drench. Builds stronger root architecture.$54.99
FREE 8 oz Nano Odor Max included ($12.99 value)
Most popular · Best resultsGrow Max Bundle
RootMax + GroMax, 16 fl oz each. The complete routine.
- Mix 2 mL per 1 L of water
- Alternate leaf spray and root drench every 5–7 days
- Free shipping + 30-day money-back guarantee
$99.99$109.98
Save $9.99
How it works
Advanced plant science. Simple steps.
GroMax = leaves. RootMax = roots. Both = soil prep.
Step 1: Mix
Add 2 mL per 1 L of non-chlorinated water. Mix fresh each time.
30 seconds
Step 2: Spray & drench
Mist the leaves with GroMax. 5–7 days later, drench the soil with RootMax. Keep alternating.
Every 5–7 days
Step 3: Harvest more
RootMax drenches only once flowering starts. Stop all use about 2 weeks before harvest, then weigh the difference.
Bigger, heavier yields
See the difference
Drag to compare.
Same plant, same bed, same sun. One got GroMax on the leaves and RootMax at the roots.
Tomato plant
Heavier trusses, darker leaves, no yellowing.
Illustration of typical results. See study numbers below.
Built for every grower
Works on everything you grow.
Vegetables, herbs, houseplants and flowers. Soil, coco and hydro. Indoors or out.
- Soil
- Coco
- Hydro
- Indoor
- Outdoor
- Greenhouse
Raised-bed vegetablesTomatoes, zucchini, lettuce
Indoor herbsBasil, mint and parsley on the sill
HouseplantsMonstera, fiddle-leaf fig
Container patioPeppers and cherry tomatoes in grow bags
FlowersRoses, dahlias, cottage beds
Greenhouse & hydroSeedlings and herb towers
Nano Odor Max
Not just smoke. Every odor. 60 seconds.
Removes any unwanted odor by penetrating deep below the surface, where candles and scented sprays can't reach.
- Car
- Apartment
- House
- Clothes
- Furniture
- Smoke
- No masking fragrance. Nothing left to smell.
- About 250 sprays per 8 oz bottle
- Safe for people, pets & plants
From $12.99 · FREE with the Grow Max Bundle
Trusted by growers nationwide
Real growers. Real results.
Stronger plants and bigger yields with Grow Max. Clean air with Odor Max.
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Grow Max customer
“The difference was obvious in the first week. Healthier plants, faster growth, and way more flower. Worth every penny.”
Jessica T. Oregon Verified purchase -
Odor Max customer
“Used it in my car after a session. Rolled the windows up, sprayed twice, waited two minutes. My buddy got in and had no idea.”
Trevor K. California Verified purchase -
Odor Max customer
“Post-harvest I spray down the whole room. Works on the air and the fabrics. Zero smell the next morning.”
J. Williams Michigan Verified purchase -
Odor Max customer
“Honestly works way better than I expected. It doesn’t smell like you sprayed anything, it just makes the room smell clean. No weird cover up scent, just gone”
Verified Customer Verified purchase -
Nano Odor Max
“It's works. I'd say it's pretty instant too. Worth it.”
Timothy Alvarez Aug 26, 2026 Verified purchase
Zero risk
Try it for 30 days, risk-free.
Run NanoGrow Max in your garden for a full month. If you don’t see the difference, email us and we’ll refund every penny — no forms, no hassle, no returns required. You take zero risk. Your plants take all the upside.
- Free shippingOn every order. No minimum.
- 30-day money-backResults guaranteed or your money back.
- Secure checkoutShop Pay, Apple Pay and Google Pay.
Questions
Good questions. Straight answers.
Still wondering? A real person replies: support@nanogrowmax.com
How do I use the Grow Max Bundle?
Mix 2 mL per 1 L of non-chlorinated water, fresh each time. Before planting, drench the soil with GroMax and RootMax together (about 9 and 5 days before). After that, mist the leaves with GroMax, then 5–7 days later drench the soil with RootMax, and keep alternating. Once flowering starts, use RootMax drenches only, and stop all use about 2 weeks before harvest.
Do I need both GroMax and RootMax?
GroMax is a leaf (foliar) spray that feeds the plant from above. RootMax is a soil drench that builds the root zone below. Together they cover the whole plant, which is why the Grow Max Bundle is our most popular choice, and it comes with a FREE 8 oz Nano Odor Max.
What can I use it on?
Vegetables, herbs, houseplants and flowers, in soil, coco or hydro, indoors or outdoors.
How fast does Odor Max actually work?
In most cases the odor is gone within 60 seconds. Heavily saturated fabrics or enclosed spaces may need a second application and a few extra minutes, but there is no waiting around.
Is Odor Max safe to use around pets and children?
Yes. The formula is non-toxic and biodegradable. Once the treated surface is dry, which takes about 30 to 60 seconds, it is safe for pets and children.
What about shipping and returns?
Shipping is FREE on every order — no minimum. Every order is also covered by a 30-day money-back guarantee: if it doesn't work for you, email us and we'll make it right.
Get started today
Feed the plant. Dominate the harvest.
The Grow Max Bundle: GroMax for the leaves, RootMax for the roots, and a FREE 8 oz Nano Odor Max in every box.