We list 15 gardens in Michigan that take a AHS Garden Network membership, across 13 towns and cities. The largest clusters are East Lansing, Saginaw and Detroit.
East Lansing is the busiest single base: 2 of the 15 are within 25 miles of it, so one day out covers 13% of the state list. Another 2 sit more than 100 miles away, and the list spans about 151 miles end to end, so the rest is a second trip rather than a detour.
Because the benefit is built for travel, the states next door are usually where the card earns its keep.