Ok here goes. If any of these steps are unclear or need more explanation let me know. First let's make sure your paper is oriented correctly.

This should be the top side of your paper or colored side, whatever side you want showing when the rose is folded. You should have grid lines running at a downward slant from the top right corner. If you don't you have orientated the grid incorrectly and need to start over, or if you flip the paper over the grid is probable orientated correctly on that side and you'll have to make that your top side.

Here are all of your non grid precreases completed. If you are missing any of these creases then you should add them before proceeding. They will help you fold the model.

Flip the paper over and mountain fold along either the two markes horizontal line or the two vertical ones. Then sink in the square.

Paper folded along lines and square sunk. Now the other two grid lines coming from the points of the square need to be made into mountain fold and folded to the right unsing the grid line next to it. The marked line is mountain and grid line to the right will be valley. Repeat on backside.

Like so, but folded to the right not the left. I messed up in this picture and have it folded to the left.

Now we have made two flaps at the top. The fla on your left needs to be folded down towards you, the right hand flap folded down to the backside away from you. Once again you are folding on grid lines. Yes, I know my picture is still backwards, sorry, I did this in kind of a rush.

Last one that is backwards, I promise. Open the paper flat again, without undoing the folds you just made. Your folds should run counter clockwise (mine are going clockwise) or in other words they are all folded to the right. Flip back over to the top side.

Here we have a correct picture of what the top side should look like.

This is a side view. lift up one of the flaps and you are going to fold it over using the middle crease (the one highlighted in blue) so that the edge meets up with the edge of the other flap. Repeat this for the remaining three flaps. As you are doing this the model will begin to form a cylinder. You might have to stick your finger inside the bottom to situate some of the folds.

Here is the result of flap one


Top and Bottom view with all flaps done

Now pull the flaps out just a little bit so you can get to the arrows which will make crimps on the flaps.

The crimp is being formed. The top two folds are mountain the bottom two valley, Also note that the edge of the flap no longer lies on a grid line but on the crease that runs from the middle of the arrow to the end of the paper.

When you are finished fold flap back around the cylinder. Repeat for remaining three crimps.

Top when finished.
If you have gotten this far without incident let me know and I will proceed with instructions on locking the bottom and finishing the model.