Klein’s – an independent greenhouse with a great Coleus selection in season every year. They used to have a friendly cat in the greenhouse. Haven’t seen her much lately, though.
Jung’s – a local (Wisconsin) chain of greenhouses. Lots of plants, but not necessarily the biggest Coleus selection. The’re a great resource for getting plastic trays and lights for starting things indoors.
Johannsen’s – an independent greenhouse. Some years the seasonal Coleus selections are better than others. Update 9.4.13: Some sad news, Johannsen’s is now closed. It caught us by surprise. It was in business for 54 years. Truly sad.