University of Maryland Extension

Ask a Gardening Expert

ASK EXTENSION brings you answers from Maryland Certified Professional Horticulturists at the Home and Garden Information Center. We answer yard and garden questions from Maryland and Washington, DC residents and strive to respond to your questions within 48 hours. During periods of high question volume, it may take us longer to reply. We appreciate your patience.

Tips for Using Ask Extension

For fastest service:

  • Find answers to many common questions on our website.
  • Read our tips for submitting good photos. In general:
    • Insect photos need to be close up, in focus, in good lighting, and include a ruler or coin to indicate size.
    • Plants to be identified should show the entire plant, preferably with close-ups of flowers or seed heads.
    • If seeking a plant disease diagnosis, photos should show the transition from healthy to affected plant material. Please also include information on the age and location of the plant(s) and soil and site conditions.
    • You can attach files in JPG, PNG, GIF, or PDF format, a maximum of 8MB.


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University programs, activities, and facilities are available to all without regard to race, color, sex, gender identity or expression, sexual orientation, marital status, age, national origin, political affiliation, physical or mental disability, religion, protected veteran status, genetic information, personal appearance, or any other legally protected class. If you need a reasonable accommodation to participate in any event or activity, please contact your local University of Maryland Extension Office.