"Frank Reid © 2008" wrote

Another thing to look for is flowers. I've figured out that when the
white peony blooms around Coburn, the green drakes aren't far behind.
Frank Reid
flytyer37.blogspot.com


.... you just joined some respected company, the only other angler I've
heard mention the connection between seasonal flower emergences and bug
hatches is Mike Lawson .... I'm sure others have but he's the only one I
personally have heard tell anglers to look for certain blooms and when we
see them, hit the river expecting a given hatch

Again, it's something that makes perfect sense since timing of both is
controlled by temperature and related factors