Growpito Sim Mix 1.5 cu ft, Reusable Stone Wool and Bio-Foam Grow Medium

Growpito Sim Mix: Stone Wool Built to Be Reused

This bag holds 1.5 cu ft of growing medium, about 42.5 liters. The base is soft, virgin stone wool, granulated and blended with spun fibers. Mixed through it are bio-foam cubes that are inert and BPA free. The foam keeps the stone wool from packing down, so air stays in the root zone between waterings. Those open pockets also give beneficial bacteria and trichoderma room to colonize. Stone wool itself is inert, so the feed you mix is the feed the roots get. That gives complete control over nutrition from seedling to harvest. Growpito builds the mix for flood and drain systems. In that setup the medium holds enough moisture that plants are watered about once every three days. Less frequent irrigation means less water and less nutrient solution through the system. The medium is light, which makes filling and moving pots easier on a big room. It is made in the USA. Growpito calls it perpetual, because the same medium goes back into service after each harvest.

Running a Reusable Stone Wool Medium in Flood and Drain

Plan on roughly two-thirds of a bag for each five-gallon pot. Fill the pots loosely and settle the mix with a first flood rather than pressing it down by hand. Set the pH and EC of the reservoir before the first irrigation, since the medium adds nothing of its own. Flood until the lower part of the pot is soaked, then let it drain fully back to the tank. Check moisture by lifting a pot before scheduling the next flood. Lighter pots are ready for water, and heavy ones can wait another day. At harvest, cut the stalk and pull the main root ball out of the pot. Break up the medium and fluff it by hand to open the structure again. Growpito says no disinfecting step is needed before replanting. Leave fine roots in place, since the established biology goes with the mix into the next crop. Top up with a little fresh mix if the volume has settled over several runs. Keep spare bags dry and sealed until they are needed.

Key Features

• 1.5 cu ft bag: About 42.5 liters of ready-to-use medium.
• Stone wool plus bio-foam: Soft granulated stone wool and spun fibers with inert, BPA-free foam cubes.
• Reusable: Fluff and replant after harvest, no disinfecting step.
• Built for flood and drain: Holds moisture so plants are watered about every three days.
• Inert base: Full control of nutrition from seedling to harvest.
• Made in the USA: Light, easy to handle and fill.

Technical Specifications