You should visit and take pictures. Then it would help if you explore your creative side and make a rudimentary sketch of your concept. Then take your idea to a professional. Local garden centers are helpful, sometimes Lowe's. Do some research. Take care, enjoy!
You might have better success speaking to a groundskeeper at the Arboretum. Google answers is typically used to ask opinions of fellow consumers, like myself who have visited an establishment. We can attest to a businesses reviews and share our opinions about an establishment. Occasionally a person employed by the business in question might see a customer question and make a response but that is not typical.
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