what is the distance between Barbary figs?
Plantation of Barbary Figs
Certified GKH Gardening Expert
This can be hard to say. These will spread and close together no matter the distance. The closer you put them together, the faster they will form wall. If you want to have a few years in between pruning, then you may need to plant them 3 or 4 feet apart.
Here is an article that will help: https://www.gardeningknowhow.com/ornamental/cacti-succulents/prickly-pear/opuntia-barbary-fig-plant.htm