Catmint grows quickly and gets very leggy, so you have to cut it back for it to look good. The thing is, I can't stand to throw away flowers - even to the compost heap.
In the past, I've brought in bouquets of catmint for a while. It is stinky, but long lasting and almost as pretty as lavender. Unfortunately, one time I brought in some ants with me. The ants were visiting a peony that neighbors the catmint, but they were more than happy to hitch a ride inside with me. Ick.
So the last time I cut back the catmint I gathered it into bunches. Then one bunch at a time, I took a l8 in length of wire and twisted it around the bunch, herb style. Then I used the long pieces of wire to attach the bunch to the front of a grapevine wreath. Eventually I covered the entire wreath and put it by my front door. It took maybe 15 minutes and about 6 bunches. I sat out in my garden while I did this, and it was kinda nice to relax in my garden and make a wreath.
Tell me of any flowers you've used to make into a wreath, I'd love to hear about it.