I am no expert at all but through reading a lot of information i have come to know that you can make hash from male plants. They have thc but much less than female plants. But your problem is you only have one male plant and that would probably not be enough to make hash out of sorry for your upset man try again next year. What you could do is let the plant fully flower and save some pollen from it in a little container or something and when you try again next year maybe pollenate one of your female plants with the pollen from your male and let his memory and good name live on with seeds from the females hahaha. pollenating females does lower the tHC in the bud the female produces but its an idea. Good Luck and hope this helped a little.
Peace.
-Tommy