I don't mean to speak for the mods, but I believe the contest is, who has the best outdoor grow. That means you could have 1000 strains, or just one kick ass one that takes pretty pictures. Variety is the spice of life. I have a 6-9 strain grow with less than 20 plants that I plan on posting up soon.
I think you need to open a grow diary. You know, the thing you can write up a report on a stain. It's an option on the homepage on the left column.
I don't quite know how I can compete because I am growing sativa's and had lights on them till Aug 10th, so they are behind. Can't write up a report with this time line. Maybe I am reading the rules wrong?