What's best?....in bit of dilemma

I have recently had a new wooden fence put across bottom of garden. The timber panels came pre-treated with whatever the makers put on them but I had planned to paint them with some sort of preservative as well.
I had then planned to train a blackberry up the fence at one end and clematis at the other.
However I now realise that this would mean I would be unable to paint the fence again in a few years time if it gets covered in blackberry and clematis....
So....any advice on the greater long term merits of preservative or blackberries would be very much appreciated please.
- also, is it still possible to buy creosote?

 

As far as I'm aware creosote is not available to the general public.
However creocote is.

 

You can still buy creocote, but it has chanaged from 10 years ago,
I use creocote and mix into it some engine oil (new oil) then paint on, usally if i put any new fence or any timber into the ground i soak it well first for a month to get the creocote well into the timber, the pre-treated stuff isn'y very good IMHO

 

The big thick dark post has been treated with 2 coats of creocote.
The panel and gate has one coat of creosote.
The creocote is much less offensive smell wise and safer for general use.

 

Ok, thank you. Creocote it will have to be then.
How often does it need re-treating please?

 

I would apply it yearly

 

OK. I'll try to grow blackberry in large pot in front of it. Thank you for the advice.