Dwarf St. Johnswort
Scientific Name: Hypericum mutilum L.
Synonyms: Hypericum mutilum L. var. <i>latisepalum</i> Fernald, Hypericum mutilum L. var. <i>parviflorum</i> (Willd.) Fernald
Classification: Plantae/ Tracheobionta / Spermatophyta / Magnoliophyta / Magnoliopsida / Dilleniidae / Theales / Clusiaceae / Guttiferae / Hypericum L./ Hypericum mutilum L.
| General Information | |
|---|---|
| Usda Symbol | HYMU |
| Group | Dicot |
| Life Cycle | AnnualPerennial, |
| Growth Habits | Forb/herb |
| Native Locations | HYMU |
Plant Guide
Use a soil moisture meter to monitor the soil moisture where Dwarf St. Johnswort is planted.
Plant Traits
Growth Requirements
| Temperature, Minimum (°F) | -23 |
|---|---|
| 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, Maximum | 7.2 |
| pH, Minimum | 4.6 |
| Planting Density per Acre, Maxim | 7000 |
| Planting Density per Acre, Minim | 4800 |
| Precipitation, Maximum | 55 |
| Precipitation, Minimum | 30 |
| Root Depth, Minimum (inches) | 8 |
| Salinity Tolerance | None |
| Shade Tolerance | Intermediate |
Morphology/Physiology
| After Harvest Regrowth Rate | Slow |
|---|---|
| Toxicity | None |
| Resprout Ability | No |
| Shape and Orientation | Semi-Erect |
| Active Growth Period | Summer |
| 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 |
| Fruit/Seed Color | Brown |
| Nitrogen Fixation | None |
| Low Growing Grass | No |
| Lifespan | Short |
| Leaf Retention | No |
| Known Allelopath | No |
| Height, Mature (feet) | 2.6 |
| Growth Rate | Moderate |
| Growth Form | Single Crown |
| Fruit/Seed Conspicuous | No |
| Foliage Texture | Medium |
Reproduction
| Vegetative Spread Rate | None |
|---|---|
| Small Grain | No |
| Fruit/Seed Abundance | Medium |
| Seedling Vigor | Medium |
| Seed Spread Rate | Slow |
| Propagated by Tubers | No |
| Propagated by Sprigs | Yes |
| Propagated by Sod | No |
| Propagated by Seed | No |
| Propagated by Cuttings | No |
| Propagated by Container | No |
| Propagated by Bulb | No |
| Propagated by Bare Root | No |
| Fruit/Seed Persistence | No |
| Fruit/Seed Period End | Fall |
| Fruit/Seed Period Begin | Summer |
| Commercial Availability | No Known Source |
| Bloom Period | Mid Summer |
| Propagated by Corm | No |
Suitability/Use
| Veneer Product | No |
|---|---|
| Pulpwood Product | No |
| Post Product | No |
| Palatable Human | No |
| Nursery Stock Product | No |
| Naval Store Product | No |
| Lumber Product | No |
| Fodder Product | No |
| Christmas Tree Product | No |
| Berry/Nut/Seed Product | No |
