Hello to all,
Container size + rootball size + how well potting medium drains = healthy / unhealthy tree. I have learned this much. I have also searched and searched and have found threads in the past where people have stated, large container = faster growing / larger tree but must be in a fast draining mix. This spring I would like to repot my Meyers Into 1/2 wine barrels. I will keep them there for 1, possible 2 years before planting them into the ground.
Is the 5-1-1 mix a fast enough draining potting medium for such a large container. The Meyers were air layered this summer and will spend the winter in the 1 gal pots I planted them in.

I know it's early to be asking this question, would like to have everything ready ahead of time so I am not scrambling last minute for supplies.

Thank you!