Gardener Job in Wheat Ridge, Colorado

I have a fairly large (15,000 square feet) yard, much of which is planting areas. Weeds are a perpetual problem, we have fairly frequent pruning needs, and we do have some planting that we'd like to do. I'd like to have someone come by every couple of weeks for a few hours to keep things tidy. I'm willing to pay whatever the market rate is, plus a premium for plant knowledge, and to make up for the relatively sporadic nature of the work. I can be fairly flexible on scheduling.