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Large St. Johnswort (Hypericum majus)


Morphology/Physiology Active Growth Period Summer After Harvest Regrowth Rate Slow Bloat None C:N Ratio Medium Coppice Potential No Fall Conspicuous No Fire Resistant No Flower Color Yellow Flower Conspicuous No Foliage Color Green Foliage Porosity Summer Porous Foliage Porosity Winter Porous Foliage Texture Medium Fruit/Seed Color Brown Fruit/Seed Conspicuous No Growth Form Single Crown Growth Rate Moderate Height at 20 Years, Maximum (feet) Height, Mature (feet) 2.6 Known Allelopath No Leaf Retention No Lifespan Short Low Growing Grass No Nitrogen Fixation None Resprout Ability No Shape and Orientation Semi-Erect Toxicity None Growth Requirements Adapted to Coarse Textured Soils No Adapted to Fine Textured Soils Yes Adapted to Medium Textured Soils Yes Anaerobic Tolerance Medium CaCO3 Tolerance Low Cold Stratification Required No Drought Tolerance None Fertility Requirement Medium Fire Tolerance Low Frost Free Days, Minimum 140 Hedge Tolerance None Moisture Use Medium pH, Minimum 4.6 pH, Maximum 7.2 Planting Density per Acre, Minimum 4800 Planting Density per Acre, Maximum 7000 Precipitation, Minimum 30 Precipitation, Maximum 55 Root Depth, Minimum (inches) 8 Salinity Tolerance None Shade Tolerance Intermediate Temperature, Minimum (-F) -23 Reproduction Bloom Period Mid Summer Commercial Availability No Known Source Fruit/Seed Abundance Medium Fruit/Seed Period Begin Summer Fruit/Seed Period End Fall Fruit/Seed Persistence No Propagated by Bare Root No Propagated by Bulb No Propagated by Container No Propagated by Corm No Propagated by Cuttings No Propagated by Seed No Propagated by Sod No Propagated by Sprigs Yes Propagated by Tubers No Seed per Pound Seed Spread Rate Slow Seedling Vigor Medium Small Grain No Vegetative Spread Rate None Suitability/Use Berry/Nut/Seed Product No Christmas Tree Product No Fodder Product No Fuelwood Product Lumber Product No Naval Store Product No Nursery Stock Product No Palatable Browse Animal Palatable Graze Animal Palatable Human No Post Product No Protein Potential Pulpwood Product No Veneer Product No

Taxonomic tree

  • Domain: Eukarya

    • Kingdom: Plantae

      • Phylum: Magnoliophyta

        • Class: Magnoliopsida

          • Order: Malpighiales

            • Family: Hypericaceae

              • Genus: Hypericum