Step 9: Science: Mycelium
Hyphae is the stringy organic material making up the mycelium. When hyphae from 2 different mycelium bodies meet they share genetic material and create a dikaryotic, secondary mycelium structure from which the fruit bodies (basidiocarps) form.
That is why we inject spores in multiple places to create more than 1 mycelium body!
The following pictures show progress of the growth.