Planted blue gramma, buffalo grass and native perennial mix, Albuquerque NM

I wanted to share my lawn replacement project results from this summer. After years of contemplation I finally decided to let my lawn die and dug up the remaining turf in my small backyard this summer. I planted blue gramma, buffalo grass and native perennial flowers seeds I obtained from our local native garden center. I am really blown away by the results. New flowers are popping up every week. My large dog has been hard on it in areas but she lives to zoom around in it and I love looking out my window at all the flowers. It looks a little chaotic for the small area but I like it though I can’t even see the paving stone path I added 😜. I am looking for recommendations on how to prepare it for winter (fertilizer, mowing. I do have leafy spurge in areas that I would love to eliminate. Thanks.