How to make grass textures with ps cs5?

i need new grass textures an i have photoshop cs5 but i dont realy know how to make a grass texture.

Check out the Unity user manual entry on Importing Assets, then read up on Texture2D if you want to fancy it up a bit.

If you’re asking about how to create textures in PS (and not about unity at all…) then you’ll have to start using google.