Gardening Help Search

Plant Samples

Due to the threat of Boxwood Blight, Rose Rosette and other serious pest/disease issues, the Garden is no longer allowing plant samples to be brought in for identification or diagnosis. These problems can spread to the garden displays and severely impact our living plant collection.

Please help us protect our plants by taking clear photos of the plant you need identified or diagnosed. Images can be emailed to plantinformation@mobot.org or brought to the Plant Doctors at the Center for Home Gardening (Open every day, 9 am - 5 pm).  

For any additional questions regarding samples, please call: 314-577-9562.

Seasonal Gardening Tips

Deadhead bulbs and spring flowering perennials as the blossoms fade.

Watch for bagworms feeding on many garden plants, but especially juniper and arborvitae.

Indoor plants moved outside for the summer are very susceptible to scortch and sunburn. Acclimate plants gradually to avoid setting them back.

Zoysia can be fertilized now while actively growing. 

Stop fertilizing cool-season grasses until fall.

Plant pumpkins now to have Jack-o-lanterns for Halloween.

As soon as cucumber and squash vines start to 'run', begin spray treatments to control cucumber beetles and squash vine borers.

To minimize diseases, water with overhead irrigation in the morning to allow the foliage to dry before nightfall.

Thinning overloaded fruit trees will result in larger and healthier fruits at harvest time. 

Prune and train young fruit trees to eliminate poorly positioned branches and to establish proper crotch angles.

 

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Enjoy the fragrant blooms of the Ozark Witch Hazel flowering in shrub borders or wooded areas on warm sunny days.
Enjoy the fragrant blooms of the Ozark Witch Hazel flowering in shrub borders or wooded areas on warm sunny days.
Repot any root-bound house plants now before vigorous growth occurs. Choose a new container that is only 1 or 2 inches larger in diameter than the old pot.
Repot any root-bound house plants now before vigorous growth occurs. Choose a new container that is only 1 or 2 inches larger in diameter than the old pot.
Bloom Time Calendar

See when plants bloom at the Garden:

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St. Louis Plants

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Gardening Help

We have staff available to help you with your gardening questions:

  • Plant Doctors: Master Gardeners and Garden staff can answer your questions in person at the Center for Home Gardening

    Every day, 9 am - 5 pm
  • Horticulture Answer Service: Have your gardening questions answered over the phone: 

    (314) 577-5143

    Mon.-Fri., 9 am to 12 pm

  • Plant Information: Email your gardening questions to: 

    plantinformation@mobot.org