Cheapest place to buy.....

[jbturf]

yes the bloster granular has both mycorrhizal fungi and beneficial bacteria.
it is in a 4-4-4 organic fert mixture with iron with seaweed extracts and humic acid as well. i have been previously been spraying bolster with good results, but this granular seems to be a more complete product.
it comes in 25lb bags $18. /bag so quite pricy for turf treatment

i used a bag today for planting some new arborvitis, ill post reults

[mkroher]

Boston:

Getting mycorrhizal fungi into the lawn is difficult.

"Application or PHC Turf Saver MUST be preceded by either aeration or vertical cutting....."

"...Apply by drop spreader then matt or brush into aeration holes or vertical cuts. Follow with an application of light to medium topdressing."

Since you're in MA, you should have a Valley Green nearby. They sell PHC products.