You can buy it from E-commerce.

can’t find e-commerce if you can give me a full link that will be Harlow full

Mahmoud you can culture it from soil and under roots of plant especially if you are using it for soil improvement or for concrete. you can also find them in gills of fish but those type might not be advisable for use in soil and concrete because of difference environment of finding them

I will use them for concrete use but I don’t know where to buy them from if you know any supplier let Me know please

Dear, you can prepare the bacteria by culturing from the roots of grass.

Dear Mahmoud if it is for research purpose it is better to culture them locally then use them instead of buying them. but if you must buy you need to know the name of the one you need to use and they all have identification ATCC. so use it to search the Internet under Bacillus Microgen you can place your order there