Any reference to medicinal or culinary use of plants or plant parts should in no way be considered an endorsement by The Ocala Food Forest or its staff. Research is crucial in safe and proper consumption or experimentational use of any plant.

Plant Information

Scientific Name: Hypericum tenuifolium
Family Name: Hypericaceae (St. John’s Wort family)
Common Name(s): St. John’s Wort
Size: Typically grows 1 to 2 feet tall and wide
Plant Type: Herbaceous perennial
Origin/Geographic Distribution: Native to the Eastern United States, commonly found in woodland settings and open fields.
Native to: A Florida Native plant, including other areas in the Southeast and parts of the Mid-Atlantic and Northeast U.S.
Planted range in the USA: Widely planted across its native range and in similar temperate climates.
Conservation Status: Not listed as threatened or endangered.

Cultivation

Planting: Best planted in spring or fall to establish before extreme temperatures.
Sun Exposure: Full sun to partial shade
Soil Type: Well-drained, can thrive in a variety of soil types, from sandy to loamy
Soil pH: 5.5 to 7.0 (slightly acidic to neutral)
Water Requirements: Moderate; drought tolerant once established but prefers consistent moisture.
Fertilizer Requirements: Low; may benefit from a light application of a balanced fertilizer in early spring.

Blog post on Natural Fertilizers
Pruning Requirements: Minimal; deadheading spent blooms can encourage more flowering.
Growth Rate: Medium; fills in areas quickly once established
Companion Planting: Complements native grasses and other perennials such as echinacea and rudbeckia, enhancing biodiversity.

Tolerance and Hardiness

Drought Tolerance: High; suitable for xeriscaping or drought-prone areas.
Frost Tolerance: Moderate; can withstand light frosts. Tolerates down to about 20°F (-6°C)
Heat Tolerance: Good; can handle up to about 95°F (35°C)
Wind Tolerance: Moderate
Salt Tolerance: Moderate; can be used in coastal landscapes away from direct salt spray.
USDA Plant Hardiness Zones: 5-10

Flower and Fruit Information

Fruit Type: Small capsules
Harvest Time: Not typically harvested; fruit appears in late summer to fall.
Fruit Description: Small, not typically a feature of ornamental interest.
Edible Plant: No, not used for culinary purposes. Has been used as a tea.
Edible Parts: N/A
Medicinal: Historically, parts of the plant have been used in traditional medicine, though not commonly today.
Flower Color: Yellow
Flower Shape: Small, star-shaped
Fragrance: Mildly fragrant, attracting bees and butterflies.
Flower Bloom Time: Spring through summer
Bloom Duration: Several weeks, providing a long-lasting display of color.
Pollination:
Self or Other?
Attracts a variety of pollinators, enhancing garden biodiversity.

Wildlife

Attracts: Bees and butterflies are particularly drawn to the flowers for their nectar.
Pollinators: Bees and butterflies play a crucial role in the pollination of this and nearby plants.
Problematic Pest: Generally pest-resistant; occasional issues with aphids and spider mites.

Blog post on how to control pest

Health and Safety

Toxic: No, Hypericum tenuifolium is not toxic and is safe around children and pets.
Poisonous Parts of Plant: None
Toxic to Humans: Not toxic
Toxic to Animals: Non-toxic; safe for pets and wildlife.
Plant Diseases to be aware of: Can be susceptible to Leaf Spot & Powdery Mildew; ensure good air circulation and proper drainage.

St. John’s Wart (Hypericum Tenuifolium) 

Imagine stepping into your garden to find a delightful expanse of Hypericum tenuifolium, also known as St. John’s Wort, a jewel among herbaceous perennials. This low-growing plant weaves a tapestry of color and texture across your landscape, becoming a staple in gardens for its easy charm and vibrant displays.

Native to the Eastern United States, St. John’s Wort captivates with its glossy green foliage, which serves as a lush backdrop for its radiant yellow blooms. These flowers, fragrant and abundant, emerge in the spring and continue to enchant throughout the summer, filling the garden with a cheerful glow. As the seasons transition, this plant doesn’t shy away from showcasing its versatility; the foliage turns into stunning shades of orange and red, providing a striking contrast and adding depth to the autumn garden landscape. This transformation not only enhances the visual appeal but also extends the interest of St. John’s Wort far beyond the blooming season, making it a cherished addition to any garden setting.

Companion Planting

For Hypericum tenuifolium (St. John’s Wort), choosing the right companion plants can create a visually appealing and ecologically balanced garden. Here’s a detailed guide to companion planting for St. John’s Wort, focusing on both Florida Native and Florida Friendly plants, complete with their USDA Planting Zone Range, benefits, and uses:

Florida Native Plants:

  1. Salvia coccinea (Scarlet Sage)

    • Zone Range: 8-10

    • Benefits: Adds vibrant red flowers that attract hummingbirds and butterflies, complementing the yellow blooms of St. John’s Wort.

    • Use: Plant alongside or in front of St. John’s Wort in a border or pollinator garden.

  2. Rudbeckia hirta (Black-eyed Susan)

    • Zone Range: 3-10

    • Benefits: The bright yellow and black flowers create a striking contrast and attract a variety of pollinators.

    • Use: Suitable for background planting, providing a taller backdrop to the lower-growing St. John’s Wort.

  3. Asclepias tuberosa (Butterfly Weed)

    • Zone Range: 4-10

    • Benefits: Offers bright orange blooms and serves as a host plant for monarch butterflies, enhancing biodiversity.

    • Use: Combine with St. John’s Wort in a sunny spot to create a hotspot for butterflies.

  4. Muhlenbergia capillaris (Pink Muhly Grass)

    • Zone Range: 6-11

    • Benefits: Provides a beautiful textural backdrop with its delicate pink plumes in the fall.

    • Use: Plant behind or around St. John’s Wort for a contrast in texture and color.

Florida Friendly Plants:

  1. Lantana camara (Lantana)

    • Zone Range: 8-11

    • Benefits: Drought-tolerant and prolific bloomer attracts butterflies and hummingbirds, providing continuous color and wildlife activity.

    • Use: Ideal for edges or as ground cover alongside St. John’s Wort in mixed beds.

  2. Stachytarpheta jamaicensis (Blue Porterweed)

    • Zone Range: 9-11

    • Benefits: Continuous bloomer that attracts butterflies and hummingbirds, complementing the pollinator-friendly nature of St. John’s Wort.

    • Use: Excellent for adding height and a splash of blue to the garden palette.

  3. Agapanthus spp. (Lily of the Nile)

    • Zone Range: 8-11

    • Benefits: Adds vertical interest with its tall, striking blue or white flower stalks.

    • Use: Plant behind St. John’s Wort for a layered, vibrant garden design.

  4. Pentas lanceolata (Pentas)

    • Zone Range: 8-11

    • Benefits: Known for attracting pollinators with its star-shaped flowers, available in a variety of colors.

    • Use: Mix with St. John’s Wort to create a full, colorful, and active flowering area.

Implementation Tips

  • Light Requirements: Ensure all chosen plants thrive under similar light conditions to St. John’s Wort for uniform growth.

  • Watering and Soil Needs: Group plants with similar water and soil preferences to promote health and reduce maintenance.

  • Aesthetic Considerations: Choose plants that offer contrasting but harmonious colors and textures to maximize visual interest and create a dynamic garden landscape.

This selection of companion plants not only boosts the visual appeal of your garden but also supports a healthy ecosystem, making your gardening experience both beautiful and beneficial.