Also known as Cedarglade St. John's Wort · Golden Hypericum · Golden St John's-Wort
Cedarglade St. Johnswort (Hypericum frondosum) is a beautiful, low-maintenance shrub with bright yellow flowers that blooms throughout summer.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
75% intensity
Prefers at least 6 hours of direct sunlight daily for best flowering. Can tolerate some shade, especially in hot climates.
Moderate Drought Tolerance Once Established
50% intensity
Keep soil consistently moist during establishment; allow topsoil to dry slightly between waterings for mature plants.
Well-drained
50% intensity
Hardy
25% intensity
Tolerates a wide range of temperatures; generally hardy in USDA zones 5-9. Protect from extreme cold in marginal zones.
Light Feeder
25% intensity
Apply a balanced, slow-release fertilizer in early spring. Avoid over-fertilization, which can reduce flowering.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Non-toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly, especially during the first year, to establish a deep root system. Once established, Hypericum frondosum is moderately drought-tolerant. Water when the top 2-3 cm of soil feels dry.
Avoid waterlogged conditions, which can lead to root rot.
Prune in late winter or early spring to remove dead or damaged wood and to shape the plant. Pruning after flowering can encourage a tidier appearance and potentially a second, smaller bloom.
Aim to maintain a desired size and shape.
Propagate by semi-hardwood cuttings taken in summer or by seed sown in autumn. Cuttings should be treated with rooting hormone and placed in a well-draining medium.
Seeds may require a period of cold stratification before germination.
Repot container-grown plants every 2-3 years, or when they become root-bound. Use a well-draining potting mix. Repotting is best done in early spring before new growth emerges.
Ensure the new pot is only slightly larger than the current one.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Cedarglade St. Johnswort (Hypericum frondosum)
Where Cedarglade St. Johnswort (Hypericum frondosum) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Malpighiales |
| Family | Hypericaceae |
| Genus | Hypericum |
| Species | Hypericum frondosum |
Similar in genus Hypericum
Answers based on plant encyclopedia data
