Having two days to complete a project is certainly not an uncommon starting-point premise for a DIY series. ``Yardcore,'' in fact, follows suit, as landscape designers Jake and Joel Moss get 48 hours to work their backyard magic. But what separates this series from the same crowd is the brothers Moss never meet the homeowner until they reveal the work they've done. The only clues they get about a homeowner's taste and what they may prefer in a landscape design is by touring…