I put roses on alot of cakes, the same roses you would make in a cupcake with a 1m tip... but they keep falling off, Ive tried stiffer icing and I have tried softer... with no luck..... any suggestions?

What is the cake covered with? Fondant or buttercream? And if buttercream, the American or European? 

I dont cover the cake first... I find the roses wont stick at all to icing... I use butter and icing sugar for the buttercream

Sorry no help here- I'm just commenting to follow your post.  I had trouble getting icing ruffles sticking to the sides of my cake, some would stick and some would slide off.  I used IMBC. 

Sorry no help here- I'm just commenting to follow your post.  I had trouble getting icing ruffles sticking to the sides of my cake, some would stick and some would slide off.  I used IMBC. 

If you use icing sugar and butter (American buttercream) it will crust and you need to use a blob of fresh buttercream or royal icing to attach them.

The Roses need something to stick to...not sure what you mean by "I don't cover the cake". But buttercream or fondant will work good. 

are you trying to add them to the side of a cake?  I've never seen buttercream roses successfully sit on the side of a cake.

Of course you can add them to the sides. And with a 1m tip you normally just pipe along, covering the entire side and/or top. It's a simple star tip I believe.

http://www.google.de/imgres?imgurl=http%3A%2F%2Featnowcrylater.com%2Fwp-content%2Fuploads%2F2013%2F09%2FIMG_8115.jpg&imgrefurl=http%3A%2F%2Featnowcrylater.com%2Frosette-cake%2F&h=474&w=711&tbnid=CQdXx2Ch9PzLnM%3A&docid=BSgsVMIwDcfniM&ei=rd-vVfuGH-PXyQP436PwBg&tbm=isch&client=ms-android-samsung&iact=rc&uact=3&page=1&start=0&ndsp=8&ved=0CB4QrQMwAGoVChMIu5G19q3vxgIV42tyCh347whu

This is an example of one of my cakes that has the roses.

this may sound strange, but one thing that I have found is to make sure that your home is about 70 degrees when you attach the roses.   I was making one for my God daughters baby shower and the roses can't falling off.  I finally discovered that my son had inadvertently turned the thermostat up. It was way to hot in the house.  Once we did that the roses stayed on the cake with no problem. I also found that you need to put some icing on the cake prior to making the roses because i agree that it needs something to stick to.   I also discovered the more layers of roses you have will increase the chance of some of them sliding off.   Hope this helps.

I have done buttercream roses a few times, I always crumb coat the cake generously first so it has something to stick to. Before putting my icing into the bag, I whip it up a bit with my spatula so it's softer. (normal buttercream) I have never had any problems :)