I'm getting ready to graft some heirloom scion onto Bud 9 and Antonovka rootstocks. The rootstocks are currently bare root whips going into soil mounded pots for the next year. The scion is coming from an old orchard in NJ and being grafted for growth in RI. Can anyone suggest a soil makeup and or amendments for the pots? Thanks!

I would just make sure that the soil is well-draining with some organic material so it would hold enough water in it for the summer.
John S
PDX OR

The only thing I would do is sift it for larger rocks and debris. I like adding a top mulch more than anything. I never really amend soil for trees -- just native dirt does okay.