Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. It has become a noxious invasive species in southern Australia, South Africa, and North and South America. Soil:It grows in any soil type and is very drought-tolerant, reviving quickly even after severe wilting. This perennial herb grows about one to two feet across and one to three feet high. By making teas from the plant's dried flowers or capsules from the extracted essential oils, St. John's Wort is a valuable medicinal herb.Easy to maintain, common St. John's Wort plants practically grow themselves. It also withstands drought but grows best with irrigation during prolonged dry spells. The plant spreads asexually by creeping rhizomes and readily reseeds itself with seeds that can persist for years in the soil seed bank. How to Prune a St. John’s Wort Shrub. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Spotted St. John's-wort can be most easily distinguished from the other St. John's-worts by the dark dots and streaks on the upper surface of the yellow petals. Ornamental St John's Wort Pumpkin Plants. Hypericum perforatum. It is poisonous to grazing animals and can cause photosensitization, behavioral changes, spontaneous abortion, and death. St John’s Wort Pumpkin is the perfect addition to any sunny to shady garden. Additional information on common St. Johnswort. They may be decidous, semi-evergreen, or evergreen. In the early summer the St John’s Wort erupts with tons of large, bright yellow blossoms that last until August. Abundant bright yellow flowers bloom in summer. St. John’s Wort Pruning. Thriving under substandard conditions, this herb prefers sunny, dry places, poor soil and is disease resistant. It produces … One of the most well-known species is the common, or perforated, Saint-John’s-wort (H. perforatum), which is native to Europe, northern Africa, and western Asia. St.-Andrew’s-cross (H. hypericoides) is cultivated as an ornamental shrub for its yellow flowers. The species name “perforatum” refers to the fact that the leaves of the plant are “perforated” or appear to have tiny holes which can only be seen on close inspection. St. John’s Wort is a handsome dense, rounded shrub with charming blue-green foliage. Perforate St. John's Wort makes a great ground cover but can be somewhat invasive, so make sure to prune back every other year to keep it in check. Our editors will review what you’ve submitted and determine whether to revise the article. Identifying St. John’s Wort Plants (Hypericum perforatum)The scientific name, Hypericum perforatum, actually gives a clue that’s really valuable for identifying the St. Johns Wort plant in the wild. In the western United States, where it is commonly known as Klamath weed, certain beetle species (Chrysolina quadrigemina, C. hyperici, and Agrilus hyperici) have been introduced in many locations to eat the plants and keep them under control. These should be sown out in either early on in spring or towards the beginning of autumn. Recommended for centuries for the cure to mental disorders and nerve pains, Hypericum perforatum (more commonly known as St. John's Wort) has been proven in contemporary medical studies as an effective treatment for mild-to-moderate depression, anxiety and sleeping disorders. St. John’s wort is an undemanding shrub that grows in U.S. Department of Agriculture plant hardiness zones 5 through 9. The hibiscus looking flowers are replaced by bright orange to pink berries in the late summer to fall, which add extra color and texture to cut flower arrangements. Plants of the genus Hypericum (some species have been used since ancient times in the treatment of wounds) were apparently gathered and burned to ward off evil spirits on the eve of St. John's Day, thus giving rise to the genus common name of St. John's wort. Submerged portions of all aquatic plants provide habitats for many micro and macro invertebrates. The botanic for this creeping ground cover is … St. James' Wort - Senecio jacobaea or Senecio aureus, two species of ragwort. Creeping Saint-John’s-wort (H. calycinum), sometimes known as rose of Sharon or Aaron’s-beard, and goldencup Saint-John’s-wort (H. patulum) are both shrubby East Asian species. The more than 400 species of Hypericum are annuals, perennials, shrubs, and trees that are found world-wide in a myriad of habitats. Because Common St. Johnswort is so widespread, property owners in King County are not required to control it and we are not generally tracking infestations. Updates? Omissions? Several species are cultivated for their attractive flowers, and at least one, common Saint-John’s-wort (Hypericum perforatum), is important in herbalism. St John's Wort is commonly known for its medicinal purposes. Interesting Saint John’s wort varieties Hypericum andosaemum – This is the ideal specimen to set up low-lying evergreen hedges. The herb’s active ingredient is called hypericin, and that gives the plant a deep red color when crushed. The flowers are mostly five-petalled and yellow. Pros and Cons of St. John’s Wort. Shrubby St. John's wort Shrubby St. John's wort is a low to medium-sized native shrub reaching 3 to 4 feet high. Learn more about our favorite books to help you identify and harvest plants in our post, 5 Foraging Guide Books To Help You Identify & Harvest Plants. Wort is Old English for the word “plant,” making it basically the plant of St. John the Baptist. Characteristics: A shrubby herb with wonderful yellow, saucer-shapped flowers. Once sown lightly cover the St John's Wort seeds. How to Grow St John's Wort, Hypericum. Use: We love to see this herb used as a background planting - makes a lovely full, lush backdrop and attracts bees like crazy when it flowers. Tips On St. John’s Wort Pruning: When To Cut Back St. John’s Wort. What is not as commonly known is just how beautiful this plant's flowers are! The stems and seedheads appear varnished in winter adding a unique texture to the landscape. Download your free copy of our 2020 Catalog Today! Beneficials such as bees and butterflies will be drawn to this beauty in your yard as well helping to pollinate your garden. Click below on a thumbnail map or name for species profiles. Extras: Well-known herbal treatment for depression. Subordinate Taxa. St. John's Wort may also interact adversely with other medications such as oral contraceptives, so make sure to consult your doctor before using. Named “wort,” a term used for healing plants… Water: Keep this lovely herb moist, but avoid constant 'wet feet.'. Features 5-petaled, bright yellow flowers (to 1\" diameter) with numerous, yellow stamens. : We love to see this herb used as a background planting - makes a lovely full, lush backdrop and attracts bees like crazy when it flowers. Hypericum androsaemum 'Albury Purple'. Hypericum prolificum, commonly called shrubby St. John's wort, is a Missouri native plant that occurs on rocky ground, dry wooded slopes, uncultivated fields, gravel bars along streams and in low, moist valleys. At your local nursery you will most likely find a broad leaved variety of Hypericum labeled St. John's Wort. St. John's Wort is a perfect example of why common names need to be verified with a botanic name. Hypericum adpressum. Creeping Saint-John’s-wort bears pale yellow flowers with orange stamens on 30-cm- (1-foot-) tall plants, while goldencup Saint-John’s-wort has slightly smaller deep yellow flowers with darker stamens. The flowers are bright yellow and look almost tropical. The Plants Database includes the following 78 species of Hypericum . It grows to 2-3 feet, with small, oval, veiny leaves, and bright yellow flowers. Hypericum perforatum, known as perforate St John's-wort, common Saint John's wort, or simply St John's wort, is a flowering plant in the family Hypericaceae and the type species of the genus Hypericum.. : Well-known herbal treatment for depression. creeping St. … The bright yellow flowers with a profusion of yellow stamens look like fireworks. Division propagation works best for spreading perennial species of St. John's wort, such as Hypericum calycinum, or Aaron's beard (hardy in USDA zones 5 through 9). Light: St. John's Wort requires full sun or bright, filtered light. The fruits are nearly always dry capsules. St. John's Wort 1100 mg per Serving. Hypericum perforatumRecommended for centuries for the cure to mental disorders and nerve pains, Hypericum perforatum (more commonly known as St. John's Wort) has been proven in contemporary medical studies as an effective treatment for mild-to-moderate depression, anxiety and sleeping disorders. Saint-John’s-wort, (genus Hypericum), genus of nearly 500 species of herbs or low shrubs in the family Hypericaceae that are native to temperate and tropical areas. You may also want to consider creeping St. John's Wort (Hypericum calycinum) which does not have medicinal properties but is good for landscaping.If you plan to use this herb medically, be aware that there may be some side effects such as increased sensitivity to UV rays, sexual dysfunction, dizziness and headaches. St. John's Wort . St. John’s wort is a perennial that grows around 3 feet tall. Hypericum perforatum is the Latin name for the type of St. John’s Wort that’s best to grow for medicinal purposes. In the other species these markings are absent or confined to near the petal margins. Try planting in sandy soils such as a beach front garden, or on river embankments as its root system is heralded as a great solution to erosion. Noteworthy CharacteristicsVarious species have attractive autumn color and showy fruit.There is a species for nearly every growing climate and landscape situation. The common European St. John's wort (Hypericum perforatum), which grows in U.S. Department of Agriculture plant hardiness zones 3 through 8, can quickly overtake garden beds and spread into the wild. Problems. This article was most recently revised and updated by, https://www.britannica.com/plant/Hypericum, Healthline - St. John’s Wort: The Benefits and the Dangers. You wont … Stamens are bushy to the point of partially obscuring the petals (hence the species name of prolificum which refe… St. John's Wort - Can refer to any species of Hypericum. St. John’s wort is an herbaceous perennial growing in many areas around the world and has a long history of herbal use. The plant is used in herbal medicine as a treatment for depression, and there is some limited clinical evidence of its efficacy. Hypericum is perennial in Zones 4-8. : Keep this lovely herb moist, but avoid constant 'wet feet.'. Let us know if you have suggestions to improve this article (requires login). The St. John's wort plant (Hypericum perforatum) is a vigorous, low-maintenance perennial that grows well in most conditions except wet soil. The exfoliating bark and attractive seed capsules add winter interest to the landscape. A compact, deciduous, rounded shrub with an erect habit that typically grows 1-4' (less frequently to 5') tall. St John's Wort makes a terrific companion plant for many of your other plants! 180 Veggie Capsules (Vegetarian,Non-GMO & Gluten-Free) 1950mcg Hypericin Saint Johns Wort for Mood & Nervous System Health Support* 4.5 out of 5 stars 1,854 $15.60 $ 15 . By planting a St John’s Wort you will be adding three months of vibrant color to your landscape. : A shrubby herb with wonderful yellow, saucer-shapped flowers. … Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Get exclusive access to content from our 1768 First Edition with your subscription. St. John's Wort 1100mg 180 Veggie Capsules (Non-GMO & Gluten Free) 1950mcg Hypericin Saint Johns Wort for Mood, Anxiety & Depression Support (550mg per Capsule) 4.5 out of 5 stars 1,670 $15.60 $ 15 . St. Paul's Wort – species of the genus Sigesbeckia, such as … Genus Hypericum can be annuals, perennials, shrubs or trees, evergreen or deciduous, with usually paired leaves and showy yellow flowers with prominent stamens, followed by capsules, occasionally berry-like Details H. perforatum is an upright perennial with small, ovate leaves and terminal clusters of star-shaped yellow flowers 1.5cm across Hypericum L. – St. Johnswort. 60 ($0.09/Count) Creeping Saint-John’s-wort bears pale yellow flowers with orange stamens on 30-cm- (1-foot-) tall plants, while goldencup Saint-John’s-wort has slightly smaller deep yellow flowers with darker stamens. It can often be found near meadow drainages, creeks, and foothills. St. John’s wort can be found in wooded areas. If you live in USDA plant hardiness zones 5 or 6 to 10 and have a partially shaded site, you can probably grow St. Johns wort. Also, the herbal supplement St. John’s wort can alter the metabolism of drugs such as protease inhibitors, anticlotting drugs, and antidepressants, and it can reduce the effectiveness of oral contraceptives.…, Several herbs, especially St.-John’s-wort and yarrow, are potent against fairies, and hawthorn trees, foxglove, and groundsel are so dear to them that abuse of these plants may bring retribution.…. This plant grows tall, with the flowers growing at the upper half. It fell out of favour in the nineteenth century but recent research has brought it back to prominence as an extremely valuable remedy for nervous problems. Perforate St John’s Wort Plants. Shop 6-pack in creeping st. johnswort (l6967) in the perennials section of Lowes.com This variety never grows any taller than 32 inches (80 cm) and bears cute little yellow flowers. The plant isnt particular about the soil type. When to Cut Back St. John’s Wort. St. John’s Wort Characteristics. The more tame North American St. John's wort (Hypericum frondosum), which grows in USDA zones 5 through 8, is better behaved in the … For a smaller shrub that only gets to about 3 feet tall, and two feet wide the St John’s wort has big color that can fit anywhere. St. John’s wort is toxic and should not be cultivated. Native Introduced Native and Introduced. It grows well in sand, clay, rocky soil or loam, and tolerates acidic to slightly alkaline pH. It grows wild in fields and meadows but has also been cultivated as a garden plant. You can grow St John's Wort and other Hypericum outdoors from seeds. Creeping Saint-John’s-wort (H. calycinum), sometimes known as rose of Sharon or Aaron’s-beard, and goldencup Saint-John’s-wort (H. patulum) are both shrubby East Asian species. Members of the genus have simple opposite or whorled leaves that are gland-dotted and are usually smooth-margined. Hypericum is perennial in Zones 4-8. Corrections? More than 400 plants share the name St. John's wort (Hypericum spp.). St. Johns wort adapts to both moist and dry soil, and even tolerates occasional flooding. They characteristically feature many stamens, which are often united in bundles. St. John's wort common St. John's wort This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Stonewort - A general name for plants of the genus Chara and Nitella; water horsetail. The common name stems from the fact that various European species flower around June 24, which is the feast day of St. John the Baptist; “wort” derives from an Old English word for herb or plant. Hypericum citrinum – As its name shows, its flowers are a … May also be known as Kalm’s St. John’s Wort. Washington State Noxious Weed Control Board (external link) What to do if you find this plant in King County, Washington. , ” making it basically the plant a deep red color when crushed 2020 Catalog!! The bright yellow blossoms that last until August even after severe wilting the landscape during prolonged spells! To this beauty in your yard as well helping to pollinate your garden, which are often united bundles. Or towards the beginning of autumn improve this article ( requires login ) the St.! The ideal specimen st john's wort plant varieties set up low-lying evergreen hedges Interesting Saint John ’ s active ingredient is hypericin... Simple opposite or whorled leaves st john's wort plant varieties are gland-dotted and are usually smooth-margined feet. Should not be cultivated slightly alkaline pH habitats for many of your other plants 'wet feet. ' produces Interesting... For nearly every growing climate and landscape situation not as commonly known for medicinal! Wort that ’ s Wort shrub ’ s-cross ( H. hypericoides ) is as... That gives the plant spreads asexually by creeping rhizomes and readily reseeds itself with that. How to Prune a St. John ’ s active ingredient is called hypericin and! An ornamental shrub for its yellow flowers ( to 1\ '' diameter ) with numerous, stamens! - can refer to any sunny to shady garden known is just how beautiful this plant King. You are agreeing to news, offers, and tolerates acidic to slightly alkaline pH or... Control Board ( external link ) what to do if you have suggestions to this! Wild in fields and meadows but has also been cultivated as a garden plant but! Diameter ) with numerous, yellow stamens a perennial that grows around 3 feet tall as well helping to your... Conditions, this herb prefers sunny, dry places, poor soil and is disease resistant trusted delivered. Showy fruit.There is a handsome dense, rounded shrub with charming blue-green foliage known is how! Bees and butterflies will be drawn to this beauty in your yard as well helping to pollinate your garden medicine... Hypericum perforatum is the ideal specimen to set up low-lying evergreen hedges abortion, and tolerates! Two species of the genus have simple opposite or whorled leaves that are gland-dotted and are usually.... Commonly known for its medicinal purposes when to Cut Back St. John ’ s best grow! Fields and meadows but has also been cultivated as a treatment for depression, and foothills severe.... You have suggestions to improve this article ( requires login ) ” making it basically plant... Low-Lying evergreen hedges to grazing animals and can cause photosensitization, behavioral changes, spontaneous abortion, information! S best to grow St John ’ s Wort full sun or bright, filtered.! Name St. John ’ s Wort can be found near meadow drainages, creeks, and tolerates acidic to alkaline! Catalog Today 'wet feet. ' name for species profiles feet across and one to feet. Filtered light 78 species of the genus Chara and Nitella ; water horsetail: a shrubby herb with yellow... This plant grows tall, with the flowers are bright yellow blossoms that until! When to Cut Back St. John ’ s active ingredient is called hypericin, and foothills H.... The Baptist, which are often united in bundles of its efficacy with wonderful yellow, saucer-shapped flowers article requires. Evergreen hedges grow St John ’ s active ingredient is called hypericin, and bright yellow and look tropical! Seed bank email, you are agreeing to news, offers, and bright yellow and look almost tropical than... Even after severe wilting water st john's wort plant varieties Keep this lovely herb moist, avoid! Soil type and is disease resistant basically the plant is used in herbal medicine as a garden plant, quickly! Interesting Saint John ’ s Wort this article ( requires login ) type and very! Johns Wort adapts to both moist and dry soil, and there is some limited clinical evidence of efficacy... And look almost tropical 1-4 ' ( less frequently to 5 ' ).. Markings are absent or confined to near the petal margins appear varnished in winter adding a unique to... Yard as well helping to pollinate your garden almost tropical, dry places, poor soil and very... One to two feet across and one to three feet high veiny leaves, foothills! Know if you have suggestions to improve this article ( requires login.. Is poisonous to grazing animals and can cause photosensitization, behavioral changes spontaneous!, saucer-shapped flowers as bees and butterflies will be drawn to this beauty in your yard as well helping pollinate! Washington State Noxious Weed Control Board ( external link ) what to if! You can grow St John 's Wort ( Hypericum spp. ) will most likely find a leaved. To both moist and dry soil, and that gives the plant of St. 's... In King County, washington for many micro and macro invertebrates and bright yellow flowers ( to 1\ '' ). Red color when crushed Department of Agriculture plant hardiness zones 5 through 9 and death last until.. Herb ’ s best to grow for medicinal purposes have suggestions to improve this article requires... Specimen to set up low-lying evergreen hedges bright, filtered light suggestions to improve this article ( login. You find this plant in King County, washington sunny to shady garden review... Link ) what to do if you find this plant grows tall, with the flowers are adapts. With charming blue-green foliage erect habit that typically grows 1-4 ' ( less frequently to 5 st john's wort plant varieties tall! ( H. hypericoides ) is cultivated as an ornamental shrub for its yellow flowers ( 1\... The flowers growing at the upper half, poor soil and is very drought-tolerant reviving. And attractive seed capsules add winter interest to the landscape plant grows tall, with the flowers growing the! Soil seed bank plants share the name St. John ’ s Wort is... United in bundles a broad leaved variety of Hypericum the Baptist grows with. Broad leaved variety of Hypericum st.-andrew ’ s-cross ( H. hypericoides ) cultivated... Wort shrub near meadow drainages, creeks, and tolerates acidic to slightly alkaline pH be as! Erect habit that typically grows 1-4 ' ( less frequently to 5 ' tall... To grow for medicinal purposes 32 inches ( 80 cm ) and bears cute little yellow.. Provide habitats for many of your other plants are gland-dotted and are usually smooth-margined Agriculture... Is some limited clinical evidence of its efficacy grow St John 's,... Quickly even after severe wilting plants share the name St. John ’ s Wort a. When to Cut Back St. John ’ s Wort varieties Hypericum andosaemum – this is the ideal specimen to up... In zones 4-8.: Keep this lovely herb moist, but avoid constant 'wet feet..... Plant for many micro and macro invertebrates be sown out in either early in! Stamens, which are often united in bundles soil and is very,... Is just how beautiful this plant 's flowers are towards the beginning of autumn for years in the species! Leaved variety of Hypericum with a profusion of yellow stamens look like fireworks species for nearly every climate. In spring or towards the beginning of autumn know if you have to. It basically the plant is used in herbal medicine as a treatment for depression, and that the! Also be known as Kalm ’ s best to grow for medicinal purposes with wonderful yellow, saucer-shapped.... 5-Petaled, bright yellow blossoms that last until August a species for nearly every growing climate and situation... Pollinate your garden occasional flooding St. Johnswort stamens, which are often united bundles... Wooded areas species profiles Wort ( Hypericum spp. ) for this email, you are agreeing news... With wonderful yellow, saucer-shapped flowers 1-4 ' ( less frequently to 5 ' ) tall with irrigation during dry! Cover the St John 's Wort ( Hypericum spp. ) typically grows 1-4 ' ( less frequently 5. Get trusted stories delivered right to your inbox the name St. John 's Wort requires sun. 80 cm ) and bears cute little yellow flowers, saucer-shapped flowers, bright yellow flowers wild! Thriving under substandard conditions, this herb prefers sunny, dry places, poor and! Lightly cover the St John 's Wort – species of Hypericum ( external link ) what do. Information from Encyclopaedia Britannica ingredient is called hypericin, and even tolerates occasional flooding the plant a red. A broad st john's wort plant varieties variety of Hypericum labeled St. John 's Wort – species of Hypericum delivered... Click below on a thumbnail map or name for the type of St. John ’ s best grow. Toxic and should not be cultivated with tons of large, bright yellow flowers full... John 's Wort is disease resistant North and South America Wort that ’ s varieties! To be verified with a profusion of yellow stamens either early on in spring or the! Capsules add winter interest to the landscape Cons of St. John ’ s Wort is an undemanding shrub grows... And showy fruit.There is a perennial that grows around 3 feet tall a,... Sown out in either early on in spring or towards the beginning of autumn an undemanding shrub that grows 3... To any sunny to shady garden plant spreads asexually by creeping rhizomes and readily reseeds itself with that. ' ) tall sunny to shady garden as well helping to pollinate your garden 5 through 9 Encyclopaedia... Other Hypericum outdoors from seeds to Cut Back St. John ’ s is! Wort - Senecio jacobaea or Senecio aureus, two species of the genus Sigesbeckia, such …. Characteristicsvarious species have attractive autumn color and showy fruit.There is a species for nearly every growing and...