Posted: 09/06/2014 at 13:24
Hi Ruth and welcome
Can you post some pics of the garden and the plants involved please? To upload pics on here you need to click on the green tree icon on the toolbar above where you type your posts. Sadly it doesn't work for phones - yet
Just cutting everything right back probably wouldn't causing any lasting damage, but it may mean that you lose some flowers this year and might even cause some difficulty with identification of plants.
If you can hold fire just a bit and let us have a look ...............