peelbark St. Johnswort
Hypericum fasciculatum · Clusiaceae
peelbark St. Johnswort (Hypericum fasciculatum) is a perennial shrub in the Clusiaceae family. It is native to North America. USDA records it as hardy in zone 7 and warmer, down to about 4°F.
At a glance
| Type | shrub USDA |
|---|---|
| Lifecycle | perennial USDA |
| Native status | native USDA |
| Mature height | 5 ft USDA |
| Light | full-sun USDA |
| Growth rate | moderate USDA |
| Soil pH | 5 USDA |
| Bloom | March–May USDA |
| Flower color | Yellow USDA |
| Hardiness zones | 7 and warmer USDA |
| Guild layer | shrub Derived |
USDA quoted from the USDA PLANTS database · Derived computed by a fixed rule from those columns. No value on this page is estimated.
Growing conditions
It needs full sun. Its cold limit is zone 7; USDA publishes no warm-end limit, so gardeners in warmer zones should check local heat tolerance separately.
Size and growth
At maturity it reaches about 5 ft, making it a low to knee-height plant. It grows at a moderate rate, which matters when you are timing a planting around the layers above it.
Bloom period
USDA records a bloom period of March through May. The flower color USDA records is yellow. Bloom timing is how the Guild Builder overlaps flowering across a planting so something is in flower for as much of the season as possible.
Bloom period is a claim about when this plant flowers. It is deliberately not a pollinator rating — no dataset we trust publishes one, so we do not make that claim. See Data & sources.
Role in a guild
Shrub layer. In a layered planting this is woody mid-level structure between the understory and the ground. We derive the layer from the plant's growth habit and mature height using a fixed rule, so the same inputs always produce the same layer.
Tags
Related plants
Others in Hypericum
- tinker's penny Hypericum anagalloides
- great St. Johnswort Hypericum ascyron
- northern St. Johnswort Hypericum boreale
- Aaron's beard Hypericum calycinum
Similar role and hardiness
- silktree Albizia julibrissin
- seaside alder Alnus maritima
- American beautyberry Callicarpa americana
- bladderpod spiderflower Cleome isomeris
- Carolina ash Fraxinus caroliniana
Where this data comes from
Every value on this page comes from the USDA PLANTS database record for symbol HYFA, or is computed from those values by a fixed rule. Nothing here is estimated or model-generated. Where USDA publishes no value, this page omits the claim rather than filling the gap.
bloom_end— quoted from USDA PLANTSbloom_start— quoted from USDA PLANTSduration— quoted from USDA PLANTSedible— quoted from USDA PLANTSflower_color— quoted from USDA PLANTSgrowth_habit— quoted from USDA PLANTSgrowth_rate— quoted from USDA PLANTSguild_role— derived by rule from USDA columnsmature_height_ft— quoted from USDA PLANTSnative_status— quoted from USDA PLANTSnitrogen_fixer— quoted from USDA PLANTSph_min— quoted from USDA PLANTSshade_tolerance— quoted from USDA PLANTStemperature_min_f— quoted from USDA PLANTSzone_min— quoted from USDA PLANTS
Read our full data sources and methodology.
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