A fabric for outdoors is usually always acrylic. Sunbrella are the leader in that field.

Agree with Oasys. Where wooden posts could rot is in the ground however, so make sure they are properly protected at ground level and the timber isn't actually touching the earth. Colour wise you could perhaps consider an ash-white exterior wood stain for the posts. I really like the colour if your panels.

thanks all for your input. Update:- - Moved most of the excess pots now except the ivy ones (but put those in smaller dark grey tubs instead so more discreet). - Getting a price for a new window to match the rest - Have been busy jet-washing the back garden & decking down as we are going to look at removing the big old slabs on the corner decking and putting some large slate black stepping stones around to break up all the "cat litter" ;) ha ha. Then paint the decking grey (just started a thread asking for colour advice on these). So the garage.... HELP turns out there is a paint for the uPVC if I can't replace that large monstrosity that is the fascia board, but I need advice on colours please? Really wish I had had a grey door put in now instead of black but that means the garage will have to be a combo of black & white or all black or leave all white. I don't think I can add grey can I if I have white windows and a black door???? what do you all think??

concrete or wooden fence posts for fenceing