Peelbark St. John's wort (Hypericum fasciculatum)

Also known as: St. Peter's Wort, Pineweed

Peelbark St. John's wort, scientifically known as *Hypericum fasciculatum*, is a perennial shrub that thrives in wetland ecosystems. This hardy plant is characterized by its peeling, reddish-brown bark and clusters of vibrant yellow flowers that bloom in late spring and summer. It typically reaches heights of 1-2 meters and has narrow, needle-like leaves arranged in whorls, which help reduce water loss.

### Distinctive Traits:
1. **Height and Structure:** Grows to about 1-2 meters tall with slender, woody branches.
2. **Leaves:** Needle-like and arranged in whorls to minimize water evaporation.
3. **Flowers:** Bright yellow, five-petaled blooms that appear in clusters.
4. **Bark:** Peels in strips, revealing a reddish layer beneath.
5. **Fruit:** Produces small, capsule-like fruits containing numerous seeds.

### Ecological Adaptations:
1. **Wetland Preference:** Flourishes in wet, acidic soils typical of marshes and stream banks.
2. **Sunlight Needs:** Prefers full sun but can also grow in partial shade.
3. **Moisture Adaptability:** Tolerates periodic flooding and consistently moist environments.
4. **Soil Acidity:** Well-suited to acidic soil conditions found in wetlands.

These features and adaptations enable Peelbark St. John's wort to be a resilient and enduring part of wetland habitats, where it contributes to the biodiversity and stability of these ecosystems.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Peelbark St. John's wort

Lifespan

Perennial

Plant Type

Shrub

Plant Height

91 cm to 1.8 m

Spread

0.5 to 1 meter

Leaf Color

Green

Flower Size

1 to 2 centimeters

Flower Color

Yellow

Images of Peelbark St. John's wort

Quickly Identify Peelbark St. John's wort

To identify Hypericum fasciculatum, look for its slender, wiry stems that often form a thicket, and the clusters of small yellow flowers it produces. The leaves are linear and needle-like, usually less than an inch in length.

Scientific Classification of Peelbark St. John's wort

Phylum

Vascular plants

Class

Dicotyledons

Order

Malpighiales

Family

St. John's wort

Genus

St. John's worts

Species

Peelbark St. John's wort

Planting and Growing of Peelbark St. John's wort

Care Difficulty

Easy

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 hours

Ideal Temperature

59-77℉

Soil Type

Potting Mix, Peat Mix

Soil pH

5.5-7

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Peelbark St. John's wort?

Hypericum fasciculatum prefers a moderate watering routine. Water this plant with approximately 500 ml per session. The key is to maintain soil moisture without over-saturating it. Ensure that the top inch of the soil is dry before proceeding with the next watering cycle.

What are the symptoms of an underwatered Peelbark St. John's wort? ›

What should I do if my Peelbark St. John's wort is not getting enough water? ›

What are the symptoms of an overwatered Peelbark St. John's wort? ›

How to save an overwatered Peelbark St. John's wort? ›

What Are the Sunlight Requirements for Peelbark St. John's wort?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours

Hypericum fasciculatum thrives best in full to partial sun conditions. Adequate sunlight promotes robust flowering and foliage, making the plant more vibrant and healthy.

How much sun does Hypericum fasciculatum need? ›

What should I do if it’s not getting enough sun? ›

How does optimal sunlight benefit Hypericum fasciculatum? ›

What Is the Ideal Temperature Range for Peelbark St. John's wort?

Ideal Temperature: 59 ~ 77℉

The optimal temperature range for Hypericum fasciculatum to thrive is between 59°F and 77°F. This range supports optimal photosynthesis, nutrient uptake, and overall plant growth. Maintaining temperatures within this window ensures that the plant remains healthy and vigorous, promoting a robust bloom.

What Soil is Best for Peelbark St. John's wort?

Soil type: Peat soil, Sandy soil, Sandy loam

Soil PH: 5.5 ~ 7

Hypericum fasciculatum thrives in well-drained soil, which prevents root rot by allowing excess water to escape quickly. This type of soil ensures that the roots are aerated and healthy, promoting vigorous growth. A moderate level of organic matter in the soil is beneficial for Hypericum fasciculatum. It provides essential nutrients that support robust growth and help the plant resist pests and diseases more effectively. While drainage is crucial, the soil should also retain enough moisture to sustain the plant during dry spells. This balance creates an optimal growing environment that supports the plant's natural life cycle without stress.

How to Fertilize Peelbark St. John's wort?

Fertilizer type: Balanced

For Hypericum fasciculatum, use a balanced fertilizer, such as a 10-10-10 formula. When using a liquid fertilizer, dilute to half the recommended strength to avoid any root burn. Apply about 1-2 liters per plant, ensuring thorough ground coverage.

How to Prune Peelbark St. John's wort?

Pruning Time: Spring, Summer

Start by removing any dead, damaged, or diseased branches at their base. Next, thin out crowded areas to ensure light penetrates the center of the plant, promoting airflow. Finally, shape the shrub by trimming overgrown stems, but avoid removing more than a third of the plant at a time. Pruning in spring allows the plant to recover quickly and promotes lush growth for summer. If pruning in summer, be gentle to avoid stress during the hotter months. Aim to prune in the cooler part of the day for the plant’s comfort. More About Pruning Techniques→

How to Propagate Peelbark St. John's wort plant?

Propagate Time: Spring,Early spring,Summer

Collect Hypericum fasciculatum seeds and soak them in water for 24 hours. This process improves the germination rate by softening the seed coat, thereby facilitating absorption of moisture and initiating germination.

Select healthy, non-flowering stems for cuttings about 6 inches in length. Ensure each cutting has at least three nodes. Dip the cut end in rooting hormone before planting it in a well-draining substrate.

Gently uproot the Hypericum fasciculatum clump and separate the root mass into smaller sections, ensuring each section has roots and shoots. Replant the divisions at the same depth they were originally growing.

More About Propagating Techniques→

How to Repot Peelbark St. John's wort plant?

Repotting frequency: Every 2-3 years

Hypericum fasciculatum requires repotting when its roots start protruding through the drainage holes or if growth seems stunted. Checking the root health in early spring or autumn is ideal as the plant is in a less active growth phase, making the transition smoother.

Select a pot that is one size larger than the current one to allow for root expansion. Ensure the pot has adequate drainage to prevent waterlogging, which can lead to root rot. Using breathable materials like terracotta can enhance air circulation, benefiting root health.

Opt for a well-draining potting mix that retains moisture but drains excess water efficiently. This balance helps prevent root rot while keeping the plant hydrated. A mix with perlite or sand enhances drainage, creating an ideal environment for Hypericum fasciculatum.