very poorly wisteria

I have planted 2 6ft Wisteria Glycine (pink) plants on the entrance to my hotel. They have both grown well this summer but in the last couple of weeks one has altered in appearance dramatically. Its leaves have gone very yellow with brownish edges. The leaves are not dropping but the difference between the two plants is very marked.

I know they are deciduous but do they go such a ghastly colour before the leaves fall??

Any suggestions would be gratefully received...

Cheers,

Gail

 

Can you post a picture? .... It could be a number of reasons but it ought hopefully to recover

 

Thanks Paul,

I'll do my best to post a piccy so you can all have a look at it

Gail

 

If it's just one of them Gail it's unlikely to be the autumn moult check the leaves for pests, or there could be something wrong with the soil, what are they planted in?