Grow More Using Less

Copyright 2013 - 2017 / Ignimbrite Inc / All Rights Reserved

NEW 50 lb. Bags

Fuschia Video

As seen in Garden and Greenhouse

Coming Soon

The Organic Silicon Amendment that has delighted growers across America is now available in convenient 50 lb. bags. Shop our store for our complete line of organic silicon products.

  • MontanaGrow Silicon Rock Growing Medium
  • MontanaGrow Granular Large
  • MontanaGrow Granular Medium
  • ​MontanaGrow Granular Minis

Rock & Granular!


Learn what Silicon can do for you

Safe on the Environment

MontanaGrowTM Silicon Amendment works as an adjuvant with fertilizers, boosting their energy efficiency, Enhanced Efficiency Fertilizers (EEF) save agriculture producers money, energize the ecosystem and help protect the environment. MontanaGrowTM benefits agriculture upstream, is good for communities downstream and helps keep the fisheries healthy - naturally

Learn More


Increased bio-mass in LSU study


Take a closer look at Silicon

This magnified image of the Ignimbrite mineral used in MontanaGrowTM demonstrates its sponge like porosity, non-crystalline form and it's unique cation characteristics.

MontanaGrowTM Silicon Amendment is derived from a high-energy deposit of amorphous (non-crystallized) volcanic tuff formed from a geologic event that occurred roughly 30 million years ago.  

Amorphous Silicon

MontanaGrowTM contains 76% plant available silicon with no additives or chemicals involved in processing. 

Silicon Amendment can help strengthen plant roots, stems and foliage. This allows you to grow more using less, more yield with less water, inputs and time while improving your bottom line. Other benefits include resistance to biotic and abiotic stresses and longer shelf life.

MontanaGrowTM Natural Fertilizer can be used for a variety of growing situations and applied many ways.  Below are links to these benefits, applications, and more.

Customer Benefits

Plant Amendment