Hypericum kalmianum 'Ames'

St. John's Wort

Ordering plants has concluded for the season. The selection on our website is what is overwintered at the nursery. Our Spring 2023 plant catalog will be available later this winter.
St. John's wort is a sun loving shrub with upright branching and bright yellow flowers that grows in a dense mound to 2-3' tall. Native to many parts of North America. 'Ames' was developed at Iowa State University for improved winter hardiness.
Secondary Name:
St. John's Wort
Plant Type:
Deciduous Shrubs
Hardiness Zone:
North East/Great Lakes
Sun Exposure:
Ultimate Plant Height:
HT 2-3'
Ultimate Spread:
SP 2-3'
Questions about our plant sizes and vocabulary? Learn more here.

At Horsford's we strive to grow the highest quality plant material and are happy to provide specific guarantees on plants purchased from our Garden Center. See our Plant Guarantee for complete details.