Goldencup St. John's wort (Hypericum patulum)
Also known as: Golden St. John’s Wort, Goldencup St. John’s Wort
The goldencup St. John's wort (Hypericum patulum) is appreciated as an ornamental shrub due to its striking yellow blooms. Originating from China, this plant has made its way to various regions globally. It is often found at higher altitudes and is favored in gardens for its decorative appeal.
In This Article
Attributes of Goldencup St. John's wort
Lifespan
Perennial
Plant Type
Shrub
Plant Height
30 cm to 1.5 m
Spread
90 cm to 1.5 m
Leaf Color
Green Blue
Flower Size
2.5 cm to 4 cm
Flower Color
Yellow
Images of Goldencup St. John's wort
Quickly Identify Goldencup St. John's wort
1
To identify Hypericum patulum, look for a small shrub with dense, dark green leaves. The bright yellow flowers have five petals and numerous stamens that resemble a starburst pattern. The flowers typically bloom from late spring to summer.
Scientific Classification of Goldencup St. John's wort
Phylum
Vascular plants
Class
Dicotyledons
Order
Nances, spurges, willows and allies
Family
St. John's wort
Genus
St. John's worts
Species
Goldencup St. John's wort
Planting and Growing of Goldencup St. John's wort
Care Difficulty
Easy
Watering Schedule
Every 4 days
Sunlight Requirements
Full sun
Sunshine Duration
6-10 hours
Ideal Temperature
60-75℉
Soil Type
Potting Mix, Peat Mix
Soil pH
6.5-7.5
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 Goldencup St. John's wort?
Hypericum patulum, commonly known as Golden St. John's wort, thrives in well-drained soil. Water it thoroughly, aiming for about 500 ml per session, ensuring the soil remains consistently moist but not waterlogged. Tailor the amount based on your plant's size and environmental conditions.
What are the symptoms of an underwatered Goldencup St. John's wort?
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What should I do if my Goldencup St. John's wort is not getting enough water?
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What are the symptoms of an overwatered Goldencup St. John's wort?
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How to save an overwatered Goldencup St. John's wort?
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What Are the Sunlight Requirements for Goldencup St. John's wort?
Hypericum patulum ideally enjoys a range of full to partial sun, with direct sunlight for 4 to 6 hours. Adequate light fosters healthy blooming and robust plant structure.
More About Sunlight Requirements Techniques→
What is the optimal lighting for Hypericum patulum?
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How can I ensure adequate light for Hypericum patulum?
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What are the benefits of ideal light for Hypericum patulum?
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What Is the Ideal Temperature Range for Goldencup St. John's wort?
Hypericum patulum thrives in temperatures ranging from 60 to 75°F. This range ensures optimal metabolic activity and aids in the robust development of its yellow flowers. Maintaining this temperature range is crucial for the plant's health and flowering potential.
What Soil is Best for Goldencup St. John's wort?
Hypericum patulum thrives in soils that offer excellent drainage. This characteristic helps prevent standing water, thus reducing the risk of root rot—a crucial consideration for optimal plant health. Loamy soils enriched with organic matter facilitate the healthy growth of Hypericum patulum, ensuring a supply of essential nutrients while supporting robust flowering and foliage development. Soils that retain adequate moisture without becoming waterlogged are ideal. Balancing water retention and drainage ensures the plant remains hydrated, especially during dry periods.
How to Fertilize Goldencup St. John's wort?
For Hypericum patulum, a moderate amount of fertilizer is recommended. Use approximately 10-15 grams of liquid fertilizer every two weeks during the growing season for optimal health and vibrant blooms.
How to Prune Goldencup St. John's wort?
Start by removing any dead, damaged, or diseased branches. These can be easily spotted as they tend to have a different color or texture compared to healthy stems. Focus on maintaining the natural shape of the plant. Trim back any excessively long branches to encourage more compact growth and enhance the plant's aesthetic appeal. Trim the center of the shrub to allow sunlight and air to penetrate the canopy. This helps to prevent fungal diseases and promotes healthy growth throughout the plant.
More About Pruning Techniques→
How to Propagate Goldencup St. John's wort plant?
1
Use a well-draining potting mix. Add some sand or perlite to improve drainage. This step is crucial as Hypericum patulum requires good soil aeration for root development.
2
Select healthy stems from the plant, ideally from non-flowering shoots. Cut about 3-5 inches below a leaf node and remove lower leaves to reduce moisture loss.
3
Scatter the seeds over the prepared soil surface and cover lightly with a layer of fine soil. Gently water to moisten and cover with a transparent lid or plastic wrap to maintain humidity.
How to Repot Goldencup St. John's wort plant?
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Repotting Hypericum patulum should be done when you notice roots poking out of the drainage holes or when the plant is no longer thriving in its current pot. Indicators such as slow growth or the soil drying out quickly might also suggest the need for repotting.
2
Select a pot that is one to two inches larger in diameter than the current one. Ensure it has ample drainage holes to avoid waterlogging. A slightly larger pot provides space for root expansion, supports stable growth, and prevents root rot.
3
Opt for well-draining soil rich in organic matter. This type of soil ensures good aeration for the roots, retaining the necessary moisture while allowing excess water to escape, which is crucial for preventing root issues.
Learn More About Goldencup St. John's wort Diseases
Anthracnose
Bacterial Leaf Spot
Black Spot
Chemical Injury
Crown Gall
Damping-off
Downy Mildew
Drought Stress
Fusarium Wilt
Gray Mold
Leaf Curl
Leaf Spot
Mosaic
Nutrient Deficiency
Nutrient Toxicity
Powdery Mildew
Root Rot
Root-knot Nematode
Rusts
Sooty Mold
Spider Mites
Temperature Stress
Thrips Damage
White Mold
