Spear_fish, that kit is quite literally how I got started in my attempts to grow mushrooms. I bought from GMHP Gourmet Mushroom Products via Amazon, same group at gmorelmushrooms.com. On Amazon, under "questions and answer" for the kit, I'm the guy that asked which species on July 8, 2014. LOL It's white morel, morchella deliciosa for the record.
I followed those instructions to a T. Nothing came up. I babied that bed for 3 years. Two years ago I put in a spore slurry from some dried mushroom packet my wife bought. Again, nothing.
During that time, I kept studying how to grow mushrooms. I started making my own production blocks and spawn for different types. I've had some great success with oysters and other common stuff.
This year I picked a new site in the yard (40 feet away) and planted my own morel spawn. Morchella importuna, same species cultivated in China. That was about 3 months ago. No results yet - as I tell everybody, "I'm hopeful for Spring 2019!"
I wish you luck