You need to make sure its on Manilla rootstock.
Adding to Rob's statement...Unfortunately, Coconut Cream on Manila rootstock will be quite difficult to find in a CA retail nursery since Coconut Cream is still legally under patent, and to my knowledge, only commercially grafted in Florida on turpentine rootstock. So you would likely have to graft CC yourself onto a LaVerne Nursery Manila rootstock.
There are at least 3 Florida businesses that sell and are certified to ship grafted Cocount Cream mango trees to CA:
Treasure of the Tropics, Plantogram, and Top Tropicals. Treasure of the Tropics is my preferred choice.