Valya Boutenko will lead a class on espalier, the practice of training trees to grow flat against a frame, fence or building, from 6 to 8:30 p.m. Tuesday, May 13, at North Mountain Park Nature Center, 620 N. Mountain Ave., Ashland.

Valya Boutenko will lead a class on espalier, the practice of training trees to grow flat against a frame, fence or building, from 6 to 8:30 p.m. Tuesday, May 13, at North Mountain Park Nature Center, 620 N. Mountain Ave., Ashland.

The cost is $10. Register online at www.ashland.or.us/register or call 541-488-6606.