BOLSTER MycoBio delivers select ingredients for effective mycorrhizal colonization, regardless of growing conditions

Bolster® MycoBio® Mycorrhizal Biostimulant & Bacterial Inoculant
Professional Grade 

Suståne Natural Fertilizer is backed by over 30 years of independent applied research on diverse crops and ecosystems. Unmatched by any other organic fertilizer manufacturer, such research is the foundation for developing products that deliver value under a wide variety of growing conditions. The superior performance of Suståne's products is recognized by growers from around the world.

Effective mycorrhizal colonization is associated with numerous soil and plant-enhancing effects, including improvements in soil structure, water use, and nutrient use efficiency. However, such benefits are not always observed due to differences in local soil conditions and variations in competitors' inoculant formulations. 

mycorrhizae cucumbercomparison

Cucumber plants treated with BOLSTER MycoBio on the left vs. untreated control on the right.  Plants treated with BOLSTER MycoBio show greater top growth and enhanced color.

mycorrhizae rootcomparison

Corn roots post-harvest.  Plants on the left were treated with BOLSTER MycoBio while plants on the right were untreated.  Plants treated with BOLSTER MycoBio show greater root development.




BOLSTER MycoBio is particularly useful at promoting rapid establishment of plants on new potting media and constructed soils. MycoBio also improves tolerance to stressed conditions.

Applications and Rates

Blend into growing media used for seed starting, transplant production and/or initial planting of rooted cuttings at 1 - 2 lb. per yd3 (.65-1.5 kg m3) of media. 

Greenhouse/Transplant Production

For seed starting, transplant production, and/or initial planting of rooted cuttings, thoroughly incorporate into potting media using 1 - 2 lb. per yd3 (.65-1.5 kg m3). Increase to 3 lb. per yd3 (1.95 kg m3) when using propagation trays with < 20 cm3 cell volumes.  For smaller planting volumes, use 1.5 tablespoon per gallon (2.6 g per L) of potting media, or 1 cup per 2.8 ft3  (128 g per .26 m3) loose filled bag of media.

Landscape and Garden Use

Apply ½ cup per gallon (64 g per 3.8 L) to fill dirt when planting. In garden beds, use just 1 teaspoon (2.5 g) of material in each transplant hole for small transplants. Alternatively, apply in furrow using 1 lb.-2 lb. per 100 ft2 (1-2 kg per 100 m2) of soil when planting.

*NOTE: Adjust fertilizer program for local conditions & requirements.


Store in a cool, dry place. Do not expose to moisture or extreme temperatures. For best results, use by expiration date printed on label. 

Item # 
Package Size Units / Case Units / Pallets
(1.4 .mm - 0.6 mm)
1 lb. jar
6 lb. canister
40 lb. bag 

12 / case
4 / case

40 cs / pallet
60 cs / pallet
50 bags / pallet

Suståne has developed research-based grow programs for indoor and outdoor Cannabis cultivation. Visit our website or contact us for more information on other Suståne products for growing medical marijuana and hemp for fiber or CBD. 

mycorrhizae sustanemicroscope

Guaranteed Analysis


36.7% Compost
   0.3% Humic Acid (derived from leonardite)

Endo-Mycorrhizae Inoculant
   Rhizophagus irregularis
   Rhizophagus clarus
   Septoglomus deserticola
   Claroideoglomus etunicatum

84 spores/g
12 spores/g
12 spores/g
12 spores/g
Bacterial Inoculant
   Bacillus subtilis
   Bacillus pumilus
   Bacillus megaterium
   Bacillus licheniformis
   Bacillus amyloliquefaciens

20,000 CFU/g
20,000 CFU/g
20,000 CFU/g
20,000 CFU/g
20,000 CFU/g

Information regarding the contents and levels of metals in this product is available on the internet at