Every Costco carry different inventory. My advice is to just go to your local Costco and check it out. I'm an online shopper but, when it comes to Costco it's always a hit or miss for me when it comes to plants.
Go online you can see what each store has
On the website they should have where you can see if it's available in-store.
Yes.
If you are a member you can go to costco.com and see what plants are available I do not know if it's store specific or not. Normally at this time of year they have fruit trees and vegetables like tomato plants. At times they have green shrubs
Thanks! Your answer is awaiting moderation.