Imperforate St. John's wort (Hypericum maculatum)

Imperforate St. John's wort

Also known as: Dotted St. John's wort

Imperforate St. John's wort is a herb that grows in damp meadows, pastures, and disturbed ground. It is distinguishable from other, similar species of its genus by its stem, which has four edges, and the rounded tips of its sepals. This herbaceous perennial flowers in late summer.

Scientific classification

Species

Imperforate St. John's wort (Hypericum maculatum)

Nances, spurges, willows and allies

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Perennial

Lifespan

30 cm to 80 cm

Plant Height

2 cm to 3 cm

Flower Size

Yellow

Flower Color

Deciduous

Leaf type

0 - 21 ℃

Ideal Temperature

Distribution of Imperforate St. John's wort

Distribution Map

Imperforate St. John's wort is a plant that is native to regions across Central and Northern Europe, extending its presence to the west into areas of Southern Europe. It has been introduced and can also be found in more northerly locales. The plant flourishes in a variety of temperate zones, preferring environments that reflect its European habitats.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Moist meadows

Care Guide for Imperforate St. John's wort

Every week

Water

Full sun

Sunlight

0 - 21 ℃

Ideal Temperature

Water: Originating from damp meadows and clearings, imperforate St. John's wort prefers moderately moist soil and should be watered weekly to maintain optimal hydration. As an herbaceous perennial, it benefits from consistent moisture during the growing season to enhance its flowering potential.

Fertilize: For imperforate St. John's wort, apply a balanced 10-10-10 NPK fertilizer at the growing season's start and mid-point, about 1/4 cup per plant. Reduce fertilization in fall to prevent frost-sensitive growth. Water thoroughly post-application for optimal nutrient absorption and to avoid root burn, ensuring vitality and prolific blooms.

Pruning: Imperforate St. John's wort is a hardy shrub with vibrant yellow flowers and pointed leaves. Prune in early to late spring, removing dead stems and overcrowding for better airflow. Cutting back by one-third promotes bushier growth, enhancing flowering and plant health. Use clean tools to prevent disease.

Propagation: Imperforate St. John's wort is propagated by surface-sowing seeds in well-draining soil, maintaining moisture without waterlogging. It thrives in sunny to partially shaded areas, and careful moisture management during germination improves success rates.

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Distribution of Imperforate St. John's wort

Care Guide for Imperforate St. John's wort

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