Plantae > Tracheophyta > Magnoliopsida > Malpighiales > Hypericaceae > Hypericum > Hypericum macrocarpum

Hypericum macrocarpum (great St. Johnswort)

Attributes

Allergen Potential [1]  Medium-Low
Screening - Summer [2]  Moderate
Screening - Winter [2]  Porous
Bloom Period [2]  Late Summer
Drought Tolerance [2]  Low
Edible [3]  May be edible. See the Plants For A Future link below for details.
Fire Tolerance [2]  High
Flower Type [3]  Hermaphrodite
Frost Free Days [2]  80 days
Fruit/Seed Abundance [2]  Medium
Fruit/Seed Begin [2]  Summer
Fruit/Seed End [2]  Fall
Growth Form [2]  Single Crown
Growth Period [2]  Spring, Summer
Growth Rate [2]  Moderate
Leaf Type [2]  Deciduous
Lifespan [3]  Perennial
Pollinators [3]  Insects, Lepidoptera
Propagation [2]  Container, Sprig
Regrowth Rate [2]  Slow
Root Depth [2]  14 inches (36 cm)
Seed Spread Rate [2]  Slow
Seed Vigor [2]  Medium
Seeds Per [2]  1799996 / lb (3968316 / kg)
Shape/Orientation [2]  Erect
Structure [4]  Herb
Vegetative Spread Rate [2]  None
Flower Color [2]  Yellow
Foliage Color [2]  Green
Fruit Color [2]  Brown
Flower Conspicuous [2]  Yes
Height [3]  4.92 feet (1.5 m)
Hardiness Zone Minimum [2]  USDA Zone: 4 Low Temperature: -30 F° (-34.4 C°) → -20 F° (-28.9 C°)
Light Preference [2]  Full Sun
Soil Acidity [2]  Neutral
Soil Fertility [2]  Intermediate
Water Use [2]  Moderate
View Plants For A Future Record : Hypericum macrocarpum

Protected Areas

Providers

Pollinated by 
Bombus pensylvanicus (bumble bee)[5]
Bombus vagans (Half-black Bumblebee)[5]

External References

USDA Plant Profile

Citations

Attributes / relations provided by
♦ 1Derived from Allergy-Free Gardening OPALS™, Thomas Leo Ogren (2000)
♦ 2USDA Plants Database, U. S. Department of Agriculture
♦ 3Plants For A Future licensed under a Creative Commons Attribution 4.0 License
♦ 4Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935
♦ 5Robertson, C. Flowers and insects lists of visitors of four hundred and fifty three flowers. 1929. The Science Press Printing Company Lancaster, PA.
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