GroWSToNe
what better plants are grown on
100 % Recycled. 100 % American Made.
w w w.g r o w s t o n e . c o m
100 % Recycled.
100 % American Made.
Growstone Hydroponic Growth Mediums and Super Soil Aerators
are a horticultural, scientific and environmental win-win-win.
Growstones are an effective alternative to perlite and Hydroton®.
They guarantee a considerably higher aeration and faster drainage
than perlite, while simultaneously holding more water than Hydroton.
Growstones provide:
3 times more water than Hydroton®
Over 70% more aeration than perlite
4 times more aeration than coco coir
The perfect balance of air and water
Growstones highly porous media associate a good water holding
capacity to high air-filled porosity. At field capacity, Growstones
hold 30% water within its pores and 50% air by volume within its
inner and inter aggregate spaces. This water to air ratio maximizes
water availability and aeration to your plant roots. It also
facilitates drainage making it impossible to over irrigate.
Average Water Holding Capacity
Air Filled Porosity of Substrates After Drainage
Other Growstones characteristics are:
High porosity and aeration
Proven yields ‘as-good-as’ the industry standards
Can satisfy a wide range of plant requirements for
different growing systems and climates
Made from 100% recycled glass
Not strip-mined like Hydroton® and perlite
Inert
pH neutral after preparation
100% non-toxic and chemical free
Lightweight, dust-free
Impossible to over water
Does not float to top when irrigated
Non-degradable
Non-compacting
Reusable
Made in the USA
“What growers like about
Growstones are they hold a
lot of oxygen and moisture.
And the fact they are recycled
makes them even better.”
“Our Rocks
Don’t Roll”
—Andrew
Founder & Inventor of Growstone
Santa Fe, New Mexico
How to Use Growstones
Growstones are easy to use, and easy to handle. They can be used
alone or blended with coco coir or sphagnum peat to increase aeration
and drainage of your potting mix. In fact, the synergies between
porous Growstones and wet coco or peat are enormous. They are
also a perfect medium for all hydroponic systems, as well as in-soil
or container gardening.
—Dylan | Deep Roots Hydroponics
Garden Supply | Sebastopol, California
Propagation
Place your seeds in any propagation media. Once roots start
to show through base of propagation plug, seedlings are ready
for transplant.
Transplant
For transplanting into all hydroponic systems:
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Preparation
Being made from recycled glass, Growstones have an initial high pH.
Preparation prior to use requires time in contact with water to lower
and stabilize the solution pH.
Instructions For first time use, open the bag at the top and poke
small holes at the bottom. Insert a water hose and let drain for a few
minutes. Place the wet Growstones in a large container and fill with
tap water until covered. Let soak for about a day. Discard the soak
water and rinse thoroughly. For best results soak again overnight.
Discard water in the garden. Now your Growstones are ready to use.
For more in-depth instructions on how best prepare Growstones
go to www.growstone.com
Irrigation and Maintenance
Irrigate as needed to maintain moisture about 1” from surface.
Fertilize as recommended by your nutrient provider. In hydroponic
systems, it is recommended to maintain pH of nutrient solution
between 5.5 and 6.5. Replenish nutrient solution weekly and replace
at least once a month to retain freshness.
Reuse and Disposal
Growstones can be reused. Simply give a vigorous shake to free
roots attached to Growstones and rinse. For crops with strong root
systems, some roots will not come free. If this occurs, replenish with
new Growstones. As with any other substrates, sterilization between
crops is recommended.
1
Prepare Growstones as mentioned in
‘Preparation’.
2
Be sure hydroponic container is clean.
3
Fill container halfway with wet Growstones.
4
Carefully loosen and remove seedlings from
propagation plug.
5
Place seedlings on top of Growstones.
6
Fill remaining volume with Growstones
around propagation plug.
7
Gently press the seedlings down to ensure
good contact between roots and growing
media. Irrigate immediately after.
Alternative Method
Fill container to top and use trowel to insert seedling plugs.
If blending with coco coir or peat, ensure root crown is at
the same level as top of growing media to avoid excess moisture
and potential root diseases.
Products
Hydroponic Growing Media:
Volume: 1.25 FT3 (35.4 liters)
When finished with your Growstones after several crops, don’t
dispose of them, reuse them! Add your used Growstone in your
outdoor garden, raised bed, lawn or container as a soil amendment
to improve texture and structure of heavy soils, or the water holding
capacity and aeration of sandy soils.
Super Soil Aerator:
Volume: 1 FT3 (28.3 liters)
and 2 FT3 (56.6 liters)
what better plants are grown on
www.growstone.com
“Growstones are made
from 100% recycled glass
right here in Albuquerque.”
—Travis | AHL Garden Supply
Albuquerque, New Mexico
Perfect For Your
Hydroponic Systems
Passive Systems
Vigorous basil plants growing in
Growstones for over 5 months in deep
water culture system. Highly fragrant
leaves were harvested weekly.
Active Systems
Ebb & Flow, Top Drip
Growstones characteristic high
aeration and moisture are ideal for
annual vegetable crops. Tomatoes,
sweet and hot peppers, and cucumbers
thrive in Ebb & Flow and Top Drip
Hydroponic systems with the addition
of Growstones.
100 %
American
Made.
Growstones are a horticultural and environmental win-win. They
start out as discarded glass in a landfill. We crush the waste glass,
mill it to a fine powder, and turn them into Growstones in our ecofriendly manufacturing process. No water is used. No strip-mining
like perlite and Hydroton®. No long distance shipping. And the best
part, Growstones are made right here in the USA.
Growstone are made from
discarded bottles from the
Albuquerque landfill
The glass is crushed
Then milled into a fine powder
The material is fired in a
large kiln and baked
THE RESULT:
Growstones hydroponic and soil
aeration growth mediums that
create healthier plants and a
healthier planet.
printed on recycled paper
100 % Recycled.
Deep Water Culture
Simple, inexpensive deep water systems
are highly productive when used with
Growstones. These systems are ideal
for aromatic herbs like basil, mint,
thyme, cilantro, parsley, or micro greens
and lettuce. They produce abundant
and healthy plants due to maximized
moisture and oxygen in the root zone.
Growstone
Sustainability
GrowSToNe
what better plants are grown on
To learn more about Growstones
go to www.growstone.com
or call us at 505 897 1665
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