This hybrid Korean maple is also known as 'Hasselkus' Enjoy the refined character of a Japanese maple on this hardy cross with a Korean maple. Developed in Madison, WI, by Dr. Ed Hasselkus, Northern Glow® originated from seed of the tough and cold-hardy Korean maple, but most resembles its Japanese maple parent. Reddish spring foliage turns an attractive green in summer and then glows bright with orange-red fall colors. Its graceful, spreading form grows to 20' tall and 24' wide. Hardy to Zone 4.