[Highland Park] Gardener Recommendations?

Hi -- We're looking for a gardener to do a relatively small job: we'd like someone to come and remove the old plants near our house and put in new bushes/flowering plants of our choosing.  Does anyone have an idea who would do such a job?  This strikes us as too small for most landscaping companies, but it's too large for us (we both work a lot). Thanks -- Jack & Miranda