Don't do it. Irish Moss isn't moss. Its Arenaria. If you get it to live, it will get into your bonsai pots and you will never get rid of it.
Or do it. Source is correct. Lots of water. Also, organic soil amendments.
Aftercare will be more important than shipping time. If it has active growth, reintroduce it to hot, direct sun a little at a time, giving it more sun gradually.
If you are really looking for tropical, Campbells Nursery on South Blvd usually has some potted in ceramic with at least basic styling, some more. Bonsai Learning Center is the best resource in the area for classes, supplies and inspiration. Only open by appointment.
Regards,
Martin
You need to be clear about what you want. Carpinus orientalis is Oriental hornbeam and is from the Mediterranean. It is what Walter Pall (and others) is growing. He shares progression threads of them here. They are not Korean hornbeam, Carpinus turc or koreana.
From Wikipedia "Carpinus...
Davidson is very nice. North side of Charlotte. Lake Norman and Mooresville are also nice on the North side. Bonsai Learning Center is Mooresville. I am South side in Waxhaw area.
Regards,
Martin
What town/city. Charlotte's a big place.
If you have roots in Asheville, the NC Arboretum would be a fine place to donate you PNW natives. They have temp controlled winter storage for their collection.
Regards,
Martin
Here is a 5 year old pitch pine seedling I've been growing since it was a 1 year old seedling. It's been in the 1gl pot for 2 years now. Planning to pot it into a training pot this Spring with the goal of eventually making it into a shohin.