Gosh, a few years ago, I had millions of spores. I had a lot of large, mature staghorns and they were loaded. Three years ago I got an order for every single mature staghorn I owned, all purchased by one person. That left me without a single spore-laden stag. I am slowly building up my inventory of sizable plants again. It takes about five years to see spore-formation. At least that has been my observation.