In article , Spider
writes
Do they both have to be Clematis? I would suggest that you train a
Chaenomeles (ornamental Quince) to your trellis for early spring to end of
May blossom.


If you keep cutting laterals back to one or two buds you can prolong the
flowering almost indefinitely. I have flowers on most of the year on
mine but I cut back constantly as it is the short spurs that flower.

janet

--
Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk