Great St. John's wort (Hypericum ascyron)

Great St. John's wort

Great St. John's wort (Hypericum ascyron) is a tall perennial native to Northeastern and Midwestern North America and Eastern Asia. It produces magnificent golden yellow flowers. This easy-growing shrub thrives in marshes, river banks, and fields under full sun to moderate shade.

Scientific classification

Species

Great St. John's wort (Hypericum ascyron)

Nances, spurges, willows and allies

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Perennial

Lifespan

Herb

Plant Type

Summer

Bloom Time

Deciduous

Leaf type

5 - 32 ℃

Ideal Temperature

Spring, Summer

Growth Season

Moderate

Growth Rate

Images of Great St. John's wort

Attributes of Great St. John's wort

Growth Rate

Moderate growth speed during spring and summer assists great St. John's wort in optimizing its development. This pace results in gradual yet continuous expansion, with surges of leaf production and steady height increases. Flowering often becomes prominent in summer, adding to the plant's intrigue while reflecting its calculated growth strategy.

Care Guide for Great St. John's wort

Every 2 weeks

Water

Full sun

Sunlight

5 - 32 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Great St. John's wort flourishes in moist environments similar to its native habitats near water sources. It tolerates moderate drought but prefers consistent moisture; watering biweekly is ideal. Best suited for outdoor settings, great St. John's wort is perfect for rain gardens or regions with fluctuating wet conditions.

Fertilize: For great St. John's wort, use balanced fertilizers with high phosphorus quarterly from spring to fall to enhance growth and flowering. Avoid over-fertilization to prevent root burn, and cease during winter dormancy. Apply in cool periods and water thoroughly afterward for optimal results.

Pruning: Great St. John's wort is a resilient perennial with vibrant yellow flowers. Prune in early to late spring for bushier growth and improved blooms. Remove dead stems and shape the plant to enhance air circulation, reduce disease risk, and promote vibrant flowering.

Propagation: Great St. John's wort is a resilient herbaceous perennial characterized by bright yellow flowers. It is propagated by division, where the root ball is separated to create new clumps, ensuring each section has sufficient roots for vigorous regrowth. This method helps maintain the plant's desirable traits.

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