lol well think that you have a pretty good chance of getting 2 males, and even with one plant all you can do is follow the faq, there arent a whole lot of secrets for big plants, i could tell you, bigger the hole you dig the quicker the roots will grow, and the plant will follow in size, lots of water, but not enough to make stagnant dirt, put as many worm casings as you can afford, virmiculite and pure worm castings would be about the best soil you can get. if i were you i would just plant more seeds...