I do the paper plan too, constantly changing and re-arranging my ideas. I keep my,options open too, when planting a new bed, by leaving gaps that I use for wallflowers, etc. that I later use for my "real" plants next spring. Eremurus roots need to be frost free I think....I probably would fleece it whilst it's waiting to be planted
New plants recently include Sisyrinchium macounii album .....this is a non-seeding utterly beautiful plant I had...and lost...many years ago..and Euryops Acraeus, small silvery, tender shrublet, that I again had and previously lost.