The best type of container is a function of available nursery equipment, the species of plant, and the conditions at the outplanting site. Conifer species can be grown in relatively small containers whereas large-leaved hardwoods require larger containers. Seedling customers prefer smaller containers for moist outplanting sites, but demand larger, deeper containers for harsh dry conditions.
You must attribute the work in the manner specified (but not in any way that suggests endorsement). You may not use this work for commercial purposes unless permission is granted by the photographer or copyright owner.