What root stock can be used for grafting apple? I prefer something readily available and easy to obtain.
You can use EMLA 26, EMLA 27, MM 111 at Raintree Nursery for $3.50 per rootstock. Goodluck.
Take a look at the ground breaking disease and Wooly Apple Aphid resistant rootstocks from Geneva.
You can find them at CumminsNursery.com
Here is a link that might be useful: CumminsNursery.com