Yellow morels are one of the most sort after of all fungi. So far in New Zealand there have only been a few times when these fungi have just turned up in someone’s back yard. Morels have never been made a commercial enterprise. They resist any attempt to grow them outside of a natural environment. It will take some patience to get a patch of morels growing but you will be rewarded with something quite unique. How cool would it be to take a dish of morels to a party or family get together that is not in supply/available anywhere else unless you have grown them yourself.
The best way to inoculate an area is to start small. Inoculate one small patch and the spawn will naturally invade new territory over time. Once you have them established you can transfer soil with the morel mycelium in it to new areas.
Morels can take some time to colonize an area before they start fruiting. You will sometimes get a small amount in the first year or 2 but this is the exception not the rule.
Morels grow well in soil that is well drained. They feed off decaying roots of trees as well as bark leaves and twigs in the top soil layer. The mycelium will also benefit from fresh hardwood fire ashes. If you have a wood burner and burn untreated hardwoods, you can use them over the inoculated area any time you have them available. It works best when the ashes are fresh. Gypsum is always good for most mushroom species, it will help with drainage and anti-clumping in fine soils and also provides essential nutrients mushrooms need to grow like sulphur and calcium.