Huge Hollyhocks, but very few flowers opening :0(

Hi,

So this is the first Summer in my new garden (well established garden, just new to me).

There are loads of Hollyhocks, most have a bit of rust, but not too bad, but hardly any of the flowers, on any of the plants, are opening, they are just dropping off all rolled up or stay closed.

Is there anything I can do to support more flowers opening, or is it just natural please? never had them before, so another new experience!

Many thanks in advance.

 

They look fine to me. If you deadhead it will encourage more flowers.

 

Thank you @john558 I realise that I don't even know how they are supposed to look

I will go and deadhead them now, thank you