It depends. "Liberal" and "conservative" are often just labels that politicians use to avoid taking real stands. Is universal health care a "liberal" objective? Fine. Is not using tax dollars to subsidize large corporations part of a "conservative" agenda? So be it. Some Greens like to be called "progressive," and some prefer "socialist" or "eco-socialist," but the truth is that labels are less important than the day-to-day work that Greens do.
(On a lighter note, some of us like to say, "We're not right or left, we're out in front!")