Sew I See!

The first month of the 365 Days of Crochet Flowers is done! First, here are the last six flowers of January: And here's the whole month: It's hard to picture a whole year's worth of these flowers.  Just one month of them has added up very quickly! The plan at the moment is to see if there are enough to sufficiently decorate a pillow slipcover.  I'll sew the cover from a solid-colored fabric (maybe just simple cream), then tack the flowers on with needle and thread.  (I'm dreading that part.  Needle and thread aren't my weapons of choice, but I don't want to glue them on, and I can't think of any other way of doing it.) The only questions are how many it'll take and whether to make one pillow cover or two. Well, there's also this question:  If I have enough flowers to make the slipcover(s), what's next?  Am I really up to the challenge of making these in size 10 thread?  Do I want  to do that?  Or should I ...