Hypericum kalmianum 'Gemo' - St. John's Wort
Hypericum kalmianum 'Gemo' - St. John's Wort

Hypericum kalmianum 'Gemo' - St. John's Wort

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Butterfly FriendlyFull SunDeer ResistantPart Shade
St. John's Wort
Hypericum kalmianum 'Gemo'

This selection is more tightly branched then the species and blooms longer as well. Butterflies and native bees are drawn in numbers to its large yellow flowers from July till September. Willow like foliage is unique looking, clean, pest free and adds subtle yet effective texture to the landscape.


  • Covered in small, radiant yellow blooms in late summer
  • Attracts bees and other beneficial insects
  • Use as a low informal hedge or mounding ground cover
  • Fine textured foliage gives it a refined look
  • Easy to grow, low maintenance

Native Range

Dunes and rocky lake shores, common around the Great Lakes from the Ottawa River to southern Ontario, Wisconsin, and the Upper Peninsula of Michigan south to Illinois and Ohio.

Map Credit: The Biota of North America 
Map Key: Green (native), Teal (native, adventive), Blue (present), Yellow (present & rare), Red (extinct)


Bumblebees are black and yellow and hairy. They carry pollen on their hind legs to bring back to the hive. They are often found foraging at flowers and are quite docile while at work. Bumblebees are beneficial insects and have no equal when it comes to pollinating certain crops such as red clover and blueberries.




Easy to grow in average, well-drained soil in full sun to part shade. Prefers moist, rich, sandy loams but tolerates poor soils and drought. If plants need pruning, cut them back to shape and reduce the size of the plant in late fall.


Mature Size: 2-3ft. Tall x 2-3ft. Wide

Hardiness Zone: 5-9

Sun Exposure: Full Sun to Part Shade

Coming Soon!

    American Beauties Offer Solution Based Plant Collections to Help you Choose

    Quick Tips for Choosing Plants:

    • Planting a variety of native trees, shrubs, perennials and vines increases biodiversity and gives wildlife a source for food, cover and nesting
    • Choose a mixture of deciduous and evergreen trees so birds and other wildlife will always be able to find shelter
    • Plant trees and large shrubs where they will block winter winds from the house and shade it in summer, that will save energy and lower your carbon footprint
    • Try your best to buy plants that were grown locally, your independent garden center will be your best bet
    • Think about ultimate height and width of the plant you choose, make sure it will fit the space you have for it when it's reached maturity
    • Plant nectar plants in groups, to attract butterflies and other beneficial insects more easily
    • Ask for help if you need it. Most garden centers either have a landscape designer on staff or they can give you a reference of a designer that is adept at native plant wildlife gardening. There will be upfront costs but they are small when compared to having to redo a landscape that wasn't what you really wanted

    Our Plant Tags Hold the Secrets to Success

    Choosing the right plants for your garden can seem like a daunting task but we’re here to help. Our horticulturists have spent a considerable amount of time researching and writing our beautiful, American Beauties plant tags to help you be successful. First of all, when you see an American Beauties branded pot at your garden center you can be confident that the plant is native to your area and a responsible choice. 

    When you look at our tag you’ll find information about the plants natural habitat. That will give you a clue to how it will work in your backyard. For instance if the plant is naturally founded and moist, shade and you have full sun, it’s not the plant for you. The “Features” section gives you an overview or plant description so you’ll know what to expect. While the “Benefits” section talks about the plants strong suits and how the plant will benefit wildlife. 

    A Special Note About Exposure

    Full sun: Prefers six or more hours of direct sunshine a day
    Partial shade: Thrives in three to six hours of daily sunshine
    Shade: Generally does well with less than three hours of sun per day. Having said that even shade loving plants will struggle in extremely deep shade.


    Best Plants for Bees - Double sided printout for download

    Best Plants for Butterflies - Double sided printout for download

    Best Plants for Birds - Double sided printout for download

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