Granny squares and Irish roses

I missed crochet the week before last so I decided I'd better have something to show for it last week. I've been very keen to try and put some flowers into the granny squares I've been doing but haven't found any really good tutorials that show me how to get the kind of flower I want into the kind of granny square I want (sort of like this one). In the absence of an actual pattern I found a couple of great tutorials for flowers on You Tube, and made an Irish Rose. I used the loops formed on the back that are meant for a third row of petals to put the outer two rows of granny square around. It's pretty much the same size as the other squares, so on a technical level it's fine, but somehow the rose isn't quite as full as I'd like, and it's a bit too big. I have a great book on flowers and other embellishments out from the library to play with, but if anyone knows of a tutorial that shows the proper way to add one in to a granny square I'd be really grateful!