Many moringa species stay very small for a long time, and need a very protected environment to keep them from getting stepped on, lost, or eaten by something. Even for medium-sized saplings of the larger species, it's very helpful to have a sanctuary. Leafcutter ants can set a small plant back with just one night's activity, not to mention marauding dogs, coatimundi, kids, or the village drunk nesting for the night.
The shadehouse is located on a hillside so will get maximal light, even as the trees below grow. It is about three by nine meters and has a bed of native soil for growing plants directly in the ground.