Poor Baby, you're just tired of Grandma and her damn garden, but that's ok, we've all been there. You just need to fold up those beautiful flowers, lovingly put them away in a plastic bag and forget about them for a while. Sounds like you need a boost of self-confidence and accomplishment. Give yourself a break, make a few simple tops (maybe a colorful nine-patch or a half-square triangle pattern, etc). In a few months or even a year or two, you'll rediscover that beautiful bag of flowers and wonder why you never finished them. With a renewed spark, you'll complete the garden and be soooooooo.... glad you didn't sell or give them away.
Good luck..