Hi Jacqui,
I've been following this and have previously commented. For some reason your blocks have been on my mind. The 9 patch idea is pretty, but I personally think it overwhelms the flowers. If you need to enlarge this, how about something simpler?? Maybe a 4 patch or solid blocks between the lovely florals. Maybe a pink or burgandy solid block with green sashing. Double border of same colors. Since there is such a variety of flowers represented, you can go with almost any colors you like. But as stated earlier, Green is a natural.
Good luck with your decision. Are you more confused now then ever?