Buy the 2015 Old Farmer's Almanac!
You do not need to pruneYou do not need to prune watermelon vines. If you want to try and grow an extra-large melon for a competition, you could cut off the lateral vines (as the best fruit is often on the main fine), but there's really no need to prune watermelon vines. You could also pinch off some of the blossoms to focus energy on less fruit.

2015 Garden Calendar2015 Weather Watcher's Calendar2015 Recipes Calendar2015 Engagement Calendar 2015 Everyday Calendar2015 Country CalendarNew Year Cross StitchLobster Rope Doormats