Acacia Koa

Koa trees are usually found in higher elevations, tend to survive better, and avoid more diseases than the trees planted lower elevations.  Locations vary from shrub-like environments to tall aligned trees.  Above 2000 ft is the recommended planting area.  They might live a very short life if planted in urban areas, but still hold significant educational value.

Temperatures vary with the elevation choice, but generally the cooler it is, the better.  Koa needs constant sunlight for best growth.  They can tolerate droughts, along with strong winds.

It is important for Koa to have clean, fresh air with plenty of sunlight. It's also recommended to space each tree out by at least 30 feet apart from the other.  Additional nitrogen isn't really needed since they already fix it. They are normally suitable growing in a mostly native hawaiian forest.

University of Hawaii <http://nativeplants.hawaii.edu/plant/view/Acacia_koa>.