Plant Calculator

Enter the approximate length and width of the area you will be planting and click 'Calculate' to determine how many Hypericum calycinum you will need.

Approx. Length (ft):
Approx. Width (ft):
*Distance Between Plants (in):

*Correct and successful spacing is complex and depends on project conditions.

Hypericum calycinum

St. John's Wort

  • Easily grown and adaptable
  • Large, yellow flowers single or in groups over summer
  • Can be used as a flowering groundcover

  • Category: Shrubs
  • Hardiness Zone: 5-9
  • Height: 12-18 in
  • Spread: 18-24 in
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