Some retailers like to spread their flower pouches throughout the garden centre to give a random look and warmer feel.
Don't forget Mother's Day.
Be creative!
As many as you can display of course.
Realistically, retail areas have limited space - Keep as much as you can reasonably hold on retail display (this could be a dozen or a 20 dozen) coming in to replenish the stock and keep your display looking fresh. Show a variety of plants in the pouch, be it 3 or 4 varieties for small retail areas to a dozen or more for large retailers