Posted: 08/08/2014 at 21:17
Go and look at other gardens, public ones, and private ones, village openings, NGS or other charities. See what's there and what you like the look of.
Garden and nursery combined make excellent choosing places. I don't know where you live but Beth Chatto's garden (where the forum trip is hanging in the balance for this weekend) is excellent and West Acre gardens and nursery in Norfolk. You see the plants in the garden and you find them in the nursery.