Amarillo greenhouse offers free workshops Pete’s Greenhouse will offer a series of complimentary workshops Saturday as part of its celebration of 40 years in business. No registration is required for the events, a news release said. The morning will begin with a 10 a.m. session about proper tree planting. Pete’s employees will offer information about how to clean and maintain fountains in a workshop to begin at 10:30 a.m. And, a session at 11 a.m.