Is it worth raisin the one plant to maturity just to find out that it is a male? It is getting late, but not too late to start some new seedlings (if that is an option for you). Considering that around half of seeds turn out to be male, i would ressomend starting some new seeds. This way you are more likely to get a male or two!! Just my 2 cents. Whatever you do decide to do, I wish you the best of luck.