boy this will be somewhat tough.. I have a zone close to your zone.. Usually that means your plants will bloom later than mine..

So spring plants

Tulips - depends. Tulips are divided into early, mid and later blooming plants. Do you recall at least if you have early bloomer so later bloomers. Months May, June, July

Daffodils - blooms at the same time as mid tulips so that's end of may to june.

Grape Hyacinths - same as daffodils

Peonies - June-july

Lilac bushes June-july

Tiger lillies - summer - June - Aug

Lillies - daylilies? - summer Aug.

Irises late spring - early summer. So June & July. Some are repeat bloomers.

Roses - mostly summer. June, August even Sept.

Coreopsis July to Sept.

Phlox - august

Geraniums - don't have it. I bet it's summer

Larkspur - summer. But larkspurs are annuals and grown from seeds.

Dahlias - depends on how soon they show life.. They need to be overwintered indoors as bare roots and replanted in early summer.

and a sumac tree - summer bloomers. August

Personally I don't worry about what month plants flower, I just go by spring, summer and fall. It's hard to tell just what month unless you know the specific variety. Most are early, mid or late bloomers. I have had tulips that bloomed from early spring til mid summer. I agree with Ianna on most things, my lilacs start blooming in mid May, the geraniums can flower anytime (again depending on the variety) but some flower all season, my coreopsis flowers June til frost. I haven't had dahlias for a while but the one I had, forgot the name but it was a nice rose/pink and white streaked, flowered on and off all summer.