Natural height is under 20 feet. Because it forms multiple trunks, it takes trimming well and can be trained to fill in whatever height you desire. Does not have deadly thorns like other acacias. Krug's Holly Ilex krugiana Wonderful small tree, guaranteed to bring wildlife to your yard. You may plant it in full sun, or in a partially shaded area, like at the edge of your forest, and plan for it to get about 25 feet, or so, tall.
New growth is dark red.
Below are two photos of one that is about 15 feet tall. The photo at right is a close-up of the one at left. You can see this arrangement of salt-tolerant plants just inside our front gate. Trim it to encourage it to develop a nice canopy, or let it go wild. Don't worry, it is a tame kind of wild.