OCTOBER 13

Hypertufa Trough Workshop: 10 a.m. Oct. 13 (part 1) and 6 p.m. Oct. 18 (part 2) at Idaho Botanical Garden, 2355 N. Penitentiary Road, Boise. Garden operations manager Rebecca Needles will demonstrate how to create a freeform trough using a cement, perlite, and peat moss mixture. $35 members, $40 nonmembers. Registration required. 343-8649, idahobotanicalgarden.org.

Divide and Conquer: 1 p.m. Oct. 13 at Idaho Botanical Garden, 2355 N. Penitentiary Road, Boise. University of Idaho advanced master gardener Vicki Henderson will demonstrate how to divide perennials to invigorate their growth and start new plants. $15 members, $20 nonmembers. Registration required. 343-8649, idahobotanicalgarden.org.

OCTOBER 15

Compost class: 1 to 4 p.m. Oct. 15 at University of Idaho Extension office, 5880 Glenwood St., Garden City. Learn how to turn yard waste into black gold for soil improvement. $5. Register: 287-5900.