I didn't start blending spinach until I got the pureed stage, however, my program suggested I can put flaxseed oil (and later ground flaxseeds) into my smoothies. It's a god send lol.
How soon where you allowed ground flaxseeds? I'm 19 days from surgery and used to add flaxseed to my shakes pre surgery. I miss them keeping me regular and helping with other things.
I will definitely ask my surgeon if I can add flaxseed to my shakes starting the third week. I used to use flax seed and chia seeds in my green smoothies pre-surgery. I hope I will be able to enjoy them again soon.