Compositions and methods are described for the treatment of prostatitis, benign prostatic hypertrophy, and prostate cancer. The compositions contain either aqueous extracts or dried mixtures of selenium- and zinc-enriched cannabis plant material, shiitake mushrooms, and maitake mushrooms. The compositions are effective in treating prostate disorders by alleviating pain and voiding symptoms, decreasing inflammation and prostate size, reducing cellular proliferation in prostate tissue, and/or reducing PSA levels to within the normal range of 0-4.