What are Growstones made from?
What is the composition and final appearance of Growstones?
Do Growstones allow for capillary water rise (wicking capacity)?
What is the importance of bulk density of hydroponic substrates?
Optimum air content for root formation and growth in greenhouses is at least 20 %, and can be as high as 45% (Gislerod, 1982). Growstone products maintain between 48 and 51% of air space at saturation (after all free water has drained away). This facilitates gas exchanges between the roots and the environment around them. Growstones reduce opportunity for anaerobic conditions that lead to root rot and lead to higher oxygen/lower carbon dioxide levels – a healthy environment for root growth and development.
How do Growstones moisture/air characteristics compare with other hydroponic substrates?
The advantage of Growstone vs. perlite is a much higher aeration, which is not accomplished at the expense of a decrease in water holding capacity.
The advantage of Growstones vs. Hydroton is the clear increase in water holding capacity due to Growstones typical open and interconnected pore cell structure, which can absorb and hold between about 30% of its volume in water by capillary action. What is really important and effective is that in Growstones, the higher air-filled porosity is not accomplished at the expenses of reducing water holding capacity, about 50% by volume. Another great advantage is that Growstones release considerably less fines than perlite or Hydroton.
Do Growstones facilitate grower crop management and plant steerability?
What is the impact of Growstones drier nature compared with other media?
Can Growstones be reused?
When used in mixes do Growstones float and wash away with irrigation?
Are Growstones available in different particle sizes?
Yes. Currently Growstones are available in three particle size ranges. For certain applications Growstones work best with specific particles sizes. The following are the different particle sizes recommended for different applications:
- Small for fungus gnat control – between 0.157“ – 0.025” (4 to 0.63 mm).
- Medium for soil enhancement – between 3/8”- 0.157” (9.5 to 4mm)
- Large for hydroponic growing (alone or in blends) – between 3/4″- 3/8″ (19 to 9.5 mm).
How does one use Growstones?
This question must be answered in two parts, because Growstones can be used in two very distinct and different ways.
The first and most simple way to use Growstones is as a soil enhancement for the cultivation of potted crops, container gardens, flowering beds and/or landscapes. Simply mix Growstones GS-1 Hydro Stones or GS-2 Mix This! into your mix at a 20 to 30 % ratio depending on plant, watering requirements and climate.
The second way to use Growstones is by itself as a hydroponic growing media.
Has anyone else tested Growstones?
Growstone produces earth-friendly, high productivity horticultural products made from recycled glass. Understanding how valuable your plants are to you, we have teamed up with renowned Universities and Institutions both nationally and internationally to conduct research comparing Growstones with the most used substrates in the industry today. As such, Growstone is certain it is providing you with the right products. So yes, it works, and you don’t have to take our word for it!
Here are a few of our test partners:
- Wageningen UR Greenhouse Horticulture, The Netherlands
- The University of Arizona, Controlled Environment Agriculture Center, Tucson, AZ
- University of Arkansas, Department of Horticulture, Fayetteville, AR
- The University of Arizona, Environmental Research Laboratory, Aquaculture, Tucson, AZ
- Department at Pennsylvania State University, University Park, PA
- NYC Science Barge, New York, NY
Where are Growstones made?
Growstones are manufactured in Albuquerque, New Mexico. Our manufacturing plant is located at the City of Albuquerque landfill where we take the recycled glass right from the recycling trucks as they are unloaded, washed and crushed.
Are Growstones Organic?
Nope. But since they are reusable and manufactured by using recycled glass bottles from landfills, they support a healthy ecosphere and provide an environment for your plants and healthy biologies to thrive in – they might not be organic, but they are certainly good for the planet.
Can Growstones be used with worms?
Worms thrive in Growstone blends with good irrigation. Despite the fact stones might seem coarse to human touch, all evidence points to the fact worms follow organic matter and water and Growstones do not get in their way.
Growstone, Inc. 7600 Reading Ave SE Albuquerque, NM 87105 email@example.com 505.908.9701