Master Gardener Help Desks


Are you having problems with your garden, yard, or trees? Do you think you may have a pest or disease problem? Need some help getting started with gardening? The Master Gardener Help Desk is a free service that assists in finding answers to a variety of horticultural questions. Please see the below contacts to which you can direct your questions – a Master Gardener will return your call or email as soon as possible!

Bureau County

  • 850 Thompson Street, Becker Professional Suites, Princeton, IL 61356
  • Phone: 815-875-2878
  • Email:
  • June through October: Princeton Farmer’s Market, select Saturdays 8:30-1:00; Spring Valley Farmer’s Market, select Wednesdays 4:00-6:00.

LaSalle County

  • 1689 North 31st Street, Suite 2, Ottawa IL 61350
  • Phone: 815-433-0707
  • Email:
  • May through October: Ottawa Farmer’s Market, select Saturdays 8:00-12:30; Mendota Farmer’s Market. First Saturday of the month, 8:00-12:00; July through October: Oglesby Farmer’s Market, every Thursday 3:00-6:00.

Marshall-Putnam Counties

  • 509 Front Street, Suite 4, Henry, IL 61537
  • Phone: 309-364-2356
  • Email: