My buttercream roses have jagged edges, should I thin my buttercream? It doesn't seem too thick?

Thank you,

Yup, my experience with jagged petals is that the butter cream is too thick. Add a bit of corn syrup or thin with a couple drops of water or milk.

I agree with Mare2009, your buttercream maybe too thick. I also find that when the narrow end or the petal tip is too narrow, my flowers become jagged. The icing tip I have most is petal tip # 104 because I am always on the look out for a better tip.

Duplicate post, please also see:

http://www.cakecentral.com/cake-decorating-ftopict-627174-.html

HTH