One of the largest Maringa suppliers in the USA is www.moringafarms.com.
They will also give advice on the best ways to plant and grow it.
I found them very helpful and you will know the
trees are grown usuing organic methods.
they also sell chia seeds which are something else you need to consider growing as they are high in omega 3 and help control blood pressure.
I talked to them about where the Moringa can grow...does not grow where the earth freezes, needs an amount of
water and I talked to some people growing it in Arizona and they do irrigate it. Try it out. It has a lot of great benefits and all parts of it can be used. Perfect
permaculture plant!