Great St. John's Wort, Giant St. John's Wort, Hypericum pyramidatum
Robust and easy to grow, Hypericum ascyron (Great St. John’s Wort) is an upright perennial boasting showy, bright yellow flowers, 2 in. wide (5 cm), adorned with a prominent bouquet of yellow stamens. Blooming for about 2-3 weeks in early to late summer, the blossoms are borne in pyramidal clusters atop stout, erect stems clad with large, elliptic leaves, 5 in. long (12 cm). They give way to ornamental seed pods which persist into winter. Great St. John’s Wort is suitable for the back of the perennial border, woodland margins or slopes.
| Hardiness |
4 - 8 |
|---|---|
| Plant Type | Perennials |
| Plant Family | Hypericaceae |
| Genus | Hypericum |
| Common names | St. John's Wort |
| Exposure | Full Sun, Partial Sun |
| Season of Interest |
Summer (Early, Mid, Late) |
| Height |
2' - 5' (60cm - 150cm) |
| Spread |
1' - 3' (30cm - 90cm) |
| Spacing |
24" - 36" (60cm - 90cm) |
| Maintenance | Low |
| Water Needs | Average |
| Soil Type | Chalk, Clay, Loam, Sand |
| Soil pH | Acid, Alkaline, Neutral |
| Soil Drainage | Moist but Well-Drained |
| Characteristics | Showy |
| Native Plants | United States, Northeast, Pennsylvania, Vermont, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Ohio, Wisconsin, Nebraska, Kansas, Illinois, Missouri, Iowa, Indiana, Michigan, Midwest, Minnesota, Southeast, West Virginia |
| Garden Uses | Banks And Slopes, Beds And Borders |
| Garden Styles | Informal and Cottage, Prairie and Meadow |
| Hardiness |
4 - 8 |
|---|---|
| Plant Type | Perennials |
| Plant Family | Hypericaceae |
| Genus | Hypericum |
| Common names | St. John's Wort |
| Exposure | Full Sun, Partial Sun |
| Season of Interest |
Summer (Early, Mid, Late) |
| Height |
2' - 5' (60cm - 150cm) |
| Spread |
1' - 3' (30cm - 90cm) |
| Spacing |
24" - 36" (60cm - 90cm) |
| Maintenance | Low |
| Water Needs | Average |
| Soil Type | Chalk, Clay, Loam, Sand |
| Soil pH | Acid, Alkaline, Neutral |
| Soil Drainage | Moist but Well-Drained |
| Characteristics | Showy |
| Native Plants | United States, Northeast, Pennsylvania, Vermont, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Ohio, Wisconsin, Nebraska, Kansas, Illinois, Missouri, Iowa, Indiana, Michigan, Midwest, Minnesota, Southeast, West Virginia |
| Garden Uses | Banks And Slopes, Beds And Borders |
| Garden Styles | Informal and Cottage, Prairie and Meadow |
How many Hypericum ascyron (Great St. John’s Wort) do I need for my garden?
| Plant | Quantity | |
|---|---|---|
| Hypericum ascyron (Great St. John’s Wort) | N/A | Buy Plants |
Create a membership account to save your garden designs and to view them on any device.
Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.
Join now and start creating your dream garden!
Create a membership account to save your garden designs and to view them on any device.
Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.
Join now and start creating your dream garden!
