I don't have much room for flowers by always try to grow some.
I have a weakness for peonies but don't actually grow any!
Other than that, I love
Sweet peas for the perfume
Old roses too
wisteria (but would never have space for that)
honeysuckle
The only things I ever manage to grow in the allotment is pot marigolds, nasturtiums and tagetes! Although this year I had Cosmos which were really successful and the late blooms were covered in hungry insects.
