Great St. John's-wort (Hypericum Ascyron) is a perennial herb in the Hypericaceae family with moderate care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 3-8. This plant is safe for cats and dogs.
Hypericum ascyron is a tall, herbaceous perennial known for its large, bright yellow flowers and its presence in moist meadows and streambanks.
Great St. John's-wort
Hypericum Ascyron
Hypericum ascyron is a tall, herbaceous perennial known for its large, bright yellow flowers and its presence in moist meadows and streambanks.
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Care Calendar
Monthly care tasks for Great St. John's-wort
Expert Care Tips
Pro tips from botanists and plant experts
Watering Tip
Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.
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