I first like to make a list of the hostas that I want, I mean the hostas that I need because I want them all. Once I have the list, I try my best to get all of them from one seller/supplier to save on shipping costs. You would be surprised how many hostas will fit in a flat rate shipping box from USPS.
Over the years I have purchased off of eBay and from several online websites devoted to selling just hostas. I've had successful purchases from both methods but some were better than others.
Use your packing list to check off the hostas as you empty the boxSellers whether on eBay or Etsy or from websites such as Bridgewood Gardens or The Hosta Farm to name two, ship using three methods. In the pot with soil, with soil but with soil and root ball wrapped in plastic, or bare root wrapped in wet paper towel then placed in a plastic bag so that the paper towel doesn't dry out.
Here is an example of an immature hosta that doesn't look anything like it final mature color which is blue.I recently purchased from two different suppliers. One shipped in small pots with soil and the other shipped bare root wrapped in wet paper towel and plastic. I tried my best to order from one supplier but since it was mid summer I was unable to find a grower that had all the hostas that I needed. Early spring usually offers the largest selections since some of the rarer hostas come in a very limited quantity.
here for a post I wrote about fertilizer and what the numbers on fertilizer packages indicate.