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Plant Information Services at the Garden
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Master Gardeners and Horticulture Specialists provide the following services to Garden visitors, Internet clients, and callers on the Plant Information Hotline at (847) 835-0972:
Contact us online with your:
Please be sure to read our guidelines for specimen collection and submission if you will be bringing in a sample for diagnosis. If you will be sending images through the online forms above, please send files in one of the requested formats.
Remember! Our diagnosis is only as good as your sample. Please follow our guidelines for collecting and submitting samples in order for us to provide you with accurate answers to your questions.
Question of the Month
Q: Every year I bring my rosemary plants inside for the winter but they never do well. Any suggestions?
A: Rosemary is a popular holiday gift plant and is often sold in various topiary shapes. It is not winter-hardy in the Chicago area and can easily be grown indoors if exposed to the right conditions.
Rosemary requires plenty of direct sun or at least a bright light location. Good air circulation is essential in order to avoid powdery mildew disease, a common fungal problem of many houseplants. Rosemary appreciates cool winter temperatures, preferably not above 60 to 65 degrees Fahrenheit, if possible.
Optimal indoor winter temperatures should be between 55 and 60 degrees. Allow the soil to become somewhat dry in between watering, but be careful not to allow it to dry out completely. The plant can be fertilized regularly every few weeks during its active growth period beginning in late winter or early spring.
Please contact Plant Information Service at (847) 835-0972 for information about plants.