Plantae > Tracheophyta > Magnoliopsida > Malpighiales > Hypericaceae > Hypericum > Hypericum boreale

Hypericum boreale (northern St. Johnswort)

Synonyms:

Wikipedia Abstract

Hypericum boreale, also known as Northern St. John's-wort, is a two to three year perennial in the genus Hypericum, and the section Trigynobrathys.
View Wikipedia Record: Hypericum boreale

Attributes

Allergen Potential [1]  Medium-Low
Screening - Summer [2]  Porous
Screening - Winter [2]  Porous
Bloom Period [2]  Early Summer
Drought Tolerance [2]  None
Fire Tolerance [2]  Medium
Frost Free Days [2]  90 days
Fruit/Seed Abundance [2]  High
Fruit/Seed Begin [2]  Summer
Fruit/Seed End [2]  Fall
Growth Form [2]  Stoloniferous
Growth Period [2]  Summer
Growth Rate [2]  Moderate
Leaf Type [2]  Deciduous
Lifespan [2]  Perennial
Propagation [2]  Sprig
Regrowth Rate [2]  Slow
Root Depth [2]  8 inches (20 cm)
Seed Spread Rate [2]  Slow
Seed Vigor [2]  Medium
Shape/Orientation [2]  Decumbent
Structure [3]  Herb
Vegetative Spread Rate [2]  Slow
Flower Color [2]  Yellow
Foliage Color [2]  Green
Fruit Color [2]  Brown
Flower Conspicuous [2]  Yes
Height [2]  8 inches (0.2 m)
Hardiness Zone Minimum [2]  USDA Zone: 3 Low Temperature: -40 F° (-40 C°) → -30 F° (-34.4 C°)
Light Preference [2]  Mixed Sun/Shade
Soil Acidity [2]  Mostly Acid
Soil Fertility [2]  Intermediate
Water Use [2]  High

Protected Areas

External References

USDA Plant Profile

NatureServe Explorer

Citations

Attributes / relations provided by
♦ 1Derived from Allergy-Free Gardening OPALS™, Thomas Leo Ogren (2000)
♦ 2USDA Plants Database, U. S. Department of Agriculture
♦ 3Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0