We list 18 gardens in Ohio that take a AHS Garden Network membership, across 15 towns and cities. The largest clusters are Columbus, Cleveland and Toledo.
Columbus is the busiest single base: 2 of the 18 are within 25 miles of it, so one day out covers 11% of the state list. Another 9 sit more than 100 miles away, and the list spans about 143 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.