Posted: 12/09/2014 at 14:57
Clematis need deep soil and are hungry and thirsty plants, Tony. Is there a good depth of soil where it is planted? It will need soil at least a foot deep and if that isn't the case, I'd recommend moving it to elsewhere in your garden. You can buy specialist clematis feed at garden centres or sprinkle fish, blood and bone around the base in early spring.
Some chrysanth's are very late flowerers but there is still time left. However, there are a lot of types and some need special treatment and are rather fussy. If they don't flower this year then they may be a type which need mollycoddling - see here: