My grass looks really weird.

I have been trying to get meshes to work as grass on terrain, but it just won't work. I tried to add grass prefabs and only meshes with the "paint detail" tab of the terrain, but when I paint it, no matter what scale I set it to, the grass just doesnt show up.

I also tried to add grass prefabs and meshes as trees. No matter what I do, it just looks incredibly stretched. You can see what the grass and the dandelion are supposed to look like in the foreground of the screenshot, and behind it is the grass prefabs and meshes added as trees. http://prntscr.com/m53lmz

These meshes are made in blender. you can see that they work exactly as supposed to when I place them by hand. (except they were too big, so i had to scale them down to about 0.2 the size). This is what the grass patch looks like when placed by hand. http://prntscr.com/m53ogj

I uploaded a .rar file of the prefabs, meshes, textures and materials to dropbox if anyone fancies a stab at it. https://www.dropbox.com/s/544r5mte7803uyq/Grass.rar?dl=0