By Jonpep
Northamptonshire,
United Kingdom 
I have a Stellar Colt Black Cherry fruit tree. After two years this year we have had 15 delicious cheeries. Its in a 12"X12"X12" Container. My question is what size container would be optimum as I think the current one may be too small. The tree is currently very healthy.
22 Jul, 2016
You would be better to put it out in the ground; perhaps in the autumn. Colt will still give you too large a tree which you will need to prune on a regular basis; (in summer after fruiting to deter silverleaf fungus). You should have selected your cherry on Gisela 5 rootstock.
22 Jul, 2016