
This year, I finally broke down and have been making gorgeous bouquets of the coreopsis, snap dragons, allium/chive, viola, gerbera daisies, delphinium, and surprise, surprise, papaver nudicaule! Who knew that poppies are fantastic cut flowers?!! I didn't. Now I know why my Grandma - who had the most exquisite gardens ever - had banks of poppies of various kinds growing. She made dried flower arrangements, and now it comes back to me that she frequently used poppies.
So now that I'm loving all these flowers and making bouquets, I thought that I could resurrect the back patch and plant a drought tolerant cutting garden.

What do you recommend? My idea is to amend the soil, and then broadcast seeds, or carefully transplant the pre-germinated seeds that I start indoors on a heat mat. The main flower type would be poppies because they are so striking, seem to grow really easily here, and are a lovely cut flower - at least the Iceland version is. Are other types the same? Specifically what about Papaver rhoeas, orientale and somniferum? If I let these varieties go to seed, will later generations appear the same? The only papaver I don't love is the California poppy since it grows wild everywhere here.
Other flowers I'm thinking of are centaurea - the deep blue cornflower, coreopsis (another one I didn't realize would last so long as a cut flower), Agrostemma, Orange cosmos, blue flax, and maybe white bishop's lace (this last one is a maybe because I realize if its the exact thing that grows wild everywhere here I'm not sure I want to chance it, as it would be so much taller than all the other flowers and I worry about its invasiveness). What do you think? The area in question is a raised bed in pretty much full sun. While I can periodically water it particularly when its getting established, my hope is to leave it be and water only occasionally. I do want to pick the flowers for bouquets though.
Your thoughts please? Any I've overlooked? Any I should do without? Thanks so much.