Camellias can take an ericaceous liquid feed and, if you want, there is a dedicated clematis feed available from GCs, which is a granular feed dissolved in water and fed to the plants regularly.
I'm sure there will be more advice from others here.

Thank you Ojibway thought I did not have any but I do so I have just fed my Camelias and Rhod etc.

Still to feed my many clematis and water butt still empty the little rain last night never touched the bottom.

Hi,

The guy at my local garden centre advised me last year to use Tomorite I am so glad I did as I have masses of wonderful buds on my camelia and my clematis are racing up the fence right now with masses of new shoots.

Thanks Marion