Attracting hummingbirds in zone 4
I live in Minnesota (zone 4) and would love to attract more hummingbirds to my garden. I was on vacation in Duluth MN last fall and one of the homes near our hotel had a shrub in the back yard which the hummingbirds couldn't get enough of. Someone told me the name but,I've forgotten though I believe that it was an annual. Does anyone have ideas for perennials or annuals that are hummingbird magnets for zone 4?