As seen in the Trees category of the forum. This impressive Holly is growing in SW Lower MI. I am planting Hollies today and had Holly on the brain so here it is!
An increasing number of people are trying out evergreen hollies north of the border too. Other than the ubiquitous I. x meserveae, people close to the southern Great Lakes are trying I. aquifolium, opaca, & pedunculosa. None as large yet as that one though.
I'm going to try to grow I. opaca here in the Detroit area. I tried an aquifolium a few years back but it didn't make it.
I am going to have to mail order the plant, none of the local nurseries carry anthing but the basic meserveae hybrids like China Girl and Blue Girl.
Wavecrest Nursery in Fennville, MI sells a number of I. opaca cultivars. Just this past summer, I purchased one called 'Dan Fenton' and am attempting it at my mother's in Coleman, Michigan. I know Dow Gardens in Midland has a cultivar which is doing quite well too.