I have a clematis (I think jackmanii)
which has climbed about 40ft up a wall.
Should I cut it back?
And if so, when?
It's a bit straggly, but flowers reasonably well.

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Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College Dublin