^ Yes, but that basically means knowing what a plant likes and dislikes. Um, avoiding the latter and trying to provide the first.
Thatz real lurve!
~
Mine was always like you described yours, Hykey.. and the only difference I can think of now is that I didn't cut the clematis back like I usually do at the end of the summer. Just left it how it was at the end of the season.
Um, maybe the clematis is like the blackberry plant which will provide fruit on the second year's 'wood' only, I'm thinking now. Meaning when one cuts the blackberry plant back it will take two years for it to flower, and thus give fruit a little later, again.
Maybe you could try to leave the plant 'alone', 'Hykey on a little bikey'
(sørry) later on this year. And, perhaps see if that will work to get the clematis to produce more flowers.
Oh, and I did enrich the soil early spring also but that's what I do every year. Kinda poor sandy soil 'we' have in this neck of the woods. It needs extra nutrients in the top soil for it drains like.. dunno, something that lets water through quite quite easily.