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Plant Care

St. john’s wort

(Hypericum monogynum)

St. john’s wort (Hypericum monogynum) - Image 1 of 10
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Also Known As

St. john’s wort, Single fruit st. john's wort, One-seeded st. john's wort

About This Plant

Hypericum monogynum is a flowering plant species that belongs to the Hypericaceae family. It is a small shrub that can grow up to 3 feet (91 cm) tall. The leaves are oblong and the flowers are yellow with five petals. It blooms in the summer.

Plant Care Instructions

Outdoor Size Range

1-3 feet (30-91 cm)

Light Requirements

Hypericum monogynum requires full sun to partial shade. It can tolerate some shade, but flowering will be reduced.

Humidity Needs

It doesn't have any specific humidity requirements.

Fertilizing Schedule

It doesn't require a lot of fertilizer. A balanced fertilizer once a year in the spring is enough.

Pruning Guidelines

Prune in the spring to remove dead or damaged branches. You can also prune to shape the plant.

Common Pests and Diseases

Hypericum monogynum is relatively pest-free, but it can be affected by spider mites and aphids.

Indoor Size Range

N/A

Watering Schedule

It prefers moist soil, but can tolerate some drought. Water regularly, especially during hot and dry periods.

Temperature Range

It can tolerate a wide range of temperatures, from -10 to 100°F (-23 to 38°C).

Growing Season

Hypericum monogynum blooms in the summer.

Growing Difficulty Level

Hypericum monogynum is easy to grow and maintain.

USDA Hardiness Zones

Hypericum monogynum is hardy in USDA zones 5-9.

Did You Know?

Hypericum monogynum has been used in traditional medicine to treat depression and anxiety. It contains hypericin, which is a natural antidepressant.

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