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Help Desk

Have a home gardening question?  Ask the UC San Joaquin Master Gardeners! Our Help Desk is staffed  Monday-Thursday 9 a.m.-Noon. 

  • Visit us during Help Desk hours at 2102 E Earhart Ave, Ste 200 Stockton, 95206. Click here for a map
  • Call us at (209) 953-6112.  If you call outside Help Desk hours, please leave both your phone number and email address so that we may respond to you in a timely manner.
  • Email us at anrmgsanjoaquin@ucanr.edu.   Please use email if you want to submit photos along with your question(s).
Please include the following information in your email:
  • Your name, phone number and city (very important!).
  • A description of the problem, including name of the plant if applicable, when the problem began, and cultural history such as watering, fertilizing, pruning, pesticides, etc.
  • Photographs of the problem, if possible and appropriate.

Bringing samples to the Master Gardener Office

For plant samples brought into the office:
The sample should be freshly acquired and just packaged in clear freezer bag--not put in a bag, left to mold for a week, and then brought in. Store in the refrigerator until you are able to bring it in.

A good size sample is required, showing leaves, bark, stem and flower, if applicable.

Try to have a section of "good" plant as well as the problem.

Write the name of the plant (if known) as well as your contact information on the bag.

For insect samples:
Do not tape an insect to a piece of paper. We can not identify insects that have been smashed, are missing body parts or that are incomplete. The best way to preserve insects in in alcohol. A container or jar with the insect inside will also work.

We regret we are unable to provide home visits or direct gardening assistance to individuals.  Also, if you are not a San Joaquin County resident, please visit the statewide Master Gardener web site to locate the web site for your county's program.