Hypericum scouleri, known by the common name Scouler's St. John's wort in English, is a flowering species of plant from western North America. It grows in areas around streams and wetlands from Canada to the highlands of Mexico. It is sometimes mistaken for the invasive Perforate St John's wort from Eurasia.
Scouler's St. John's wort has strong disease resistance and is generally not prone to illness. However, it can be vulnerable to pests and diseases present in its environment. Such infections are usually mild. Regarding care, this plant needs moderate maintenance. It should be pruned regularly to preserve a tidy appearance and encourage healthy growth. Fertilizing can also help stimulate flowering. Scouler's St. John's wort is appropriate for anyone with an outdoor area, such as a garden or patio, and does not require extensive gardening experience. It may need more attention when grown indoors.
How to keep Hypericum Scouleri.
Water
Scouler's St. John's wort is drought-tolerant but does not survive well in waterlogged soil. In its first year, it needs about 25 mm (1 inch) of water each week. In regions with regular rainfall, additional watering isn't necessary after the first year, as the plant relies on natural precipitation. Overwatering can lead to root rot.
Fertilizer
One application of fertilizer in spring is typically enough for Scouler's St. John's wort, though multiple feedings can maximize growth. Fertilize every month to every month and a half. Feeding improves the leaves' appearance and function, helping maintain consistent color and a healthy texture. It also encourages root growth and nutrient uptake, supporting long-term plant health.
Pruning
Scouler's St. John's Wort, recognized for its bright yellow flowers and versatility, benefits from pruning in early spring. Effective techniques involve removing dead branches and thinning out dense growth to improve airflow. These practices encourage healthy growth and abundant flowering, while clean cuts help prevent disease, enhancing both the plant's shape and overall health.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Perennial
- Genus
- Hypericum
- Family
- Hypericaceae
- Hardiness Zone
- 6-9
- Mature Height
- 15 cm to 61 cm
- Native Area
- Mexico
Other names.
Reader questions.
What are the sun requirements for Scouler's St. John's wort?
Scouler's St. John's wort, scientifically known as Hypericum scouleri, thrives in both full and partial sun conditions. Full sun exposure means that the plant should receive above 6 hours of sunlight daily, while partial sun refers to about 3-6 hours of sunlight each day. It's important to observe how sunlight moves through your garden throughout the day to find spots that offer the ideal balance of light and shade. This careful placement ensures that your Scouler's St. John's wort plants are happy and healthy.
