Yes it is, I was there last week with my dog. From their website: "Well-behaved canine guests are welcome and must be on a maximum 6ft. leash at all times while on property. Owners are responsible for cleaning up after their pets and for any damage caused by their pets."
From a Google search. If you plan to visit Bok Tower Gardens, please be aware that pets are not allowed in the gardens. A shaded, open-air pet pen with water is available for a nominal fee. Limited indoor arrangements can be made for small pets.
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