Posted: 27/08/2015 at 18:14
Hi Sophie. Are both beds in shadier sites or are some parts sunnier? That will help with suggestions.
The Acer and the Fatsia will prefer the shadier areas and I'm assuming you've planted those, but perhaps that's wrong? Most ferns are shade lovers too so that group will work well together. Fatsias grow quite quickly in the right conditions, but the Acer will take a while, so just make sure you give it the room it deserves. It also depends on which variety it is.
For a sunnier site, I'd recommend Phormiums to give you a spikier foliage plant.There are lots of varieties so you can mix colours. Many are variegated. If you're able to provide protection in winter - ie a greenhouse or conservatory - you could try Cannas for the sunnier site as well. there are good perennials like Crocosmia which will give you big foliage and bright flowers. The variety 'Lucifer' makes a big plant with striking stems of red flowers.
Google these and see what you think. There are lots of other choices too. If you can put a few pix on it will help with further ideas. Click on the tree icon in the toolbar and follow instructions