Hard Alstonia (Alstonia Macrophylla) is a perennial tree in the Apocynaceae family with moderate care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 10-12. This plant is toxic to cats and dogs — keep it out of reach of pets.

Alstonia macrophylla is a tall, fast-growing tree native to South and Southeast Asia, known for its straight trunk, smooth bark, and whorled leaves.