{"product_id":"millepertuis-de-kalm","title":"St. John's Wort ","description":"\u003ch2\u003e\u003cstrong\u003eSt. John’s Wort (\u003ci\u003eHypericum kalmianum\u003c\/i\u003e)\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCompact Native Flowering Shrub for Ontario and Eastern Canada (Zones 4–7)\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eQuick Expert Summary\u003c\/h2\u003e\n\u003cp\u003eThe St. John’s Wort (\u003ci\u003eHypericum kalmianum\u003c\/i\u003e) is a \u003cstrong\u003eslow-growing, very cold-hardy\u003c\/strong\u003e shrub ideal for Ontario and Eastern Canada (Zones 4–7). It typically grows \u003cstrong\u003e0.5–1 ft per year (15–30 cm)\u003c\/strong\u003e and reaches \u003cstrong\u003e~3 ft (1 m)\u003c\/strong\u003e at maturity. Best for \u003cstrong\u003esmall gardens, foundation planting, and pollinator-friendly landscapes\u003c\/strong\u003e, it offers bright yellow summer flowers and exceptional adaptability to dry and poor soils.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Choose St. John’s Wort for Ontario and Eastern Canada?\u003c\/h2\u003e\n\u003cp\u003eA tough native shrub perfectly adapted to harsh climates, valued for its summer blooms and ability to thrive in difficult soils.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHardiness:\u003c\/strong\u003e Zone 4 (Ideal for Ontario and Eastern Canada Zones 4–7)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGrowth Rate:\u003c\/strong\u003e Slow\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e Small yards, ornament\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMaintenance:\u003c\/strong\u003e Low once established\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eKey Feature:\u003c\/strong\u003e Bright yellow summer flowers\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNative \/ Non-native:\u003c\/strong\u003e Native to Quebec and Eastern North America\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIt adapts well to:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMoist soils (but tolerant to dry conditions)\u003c\/li\u003e\n\u003cli\u003ePoor or rocky soils\u003c\/li\u003e\n\u003cli\u003eClay, sandy, or loamy soils\u003c\/li\u003e\n\u003cli\u003eUrban and roadside conditions\u003c\/li\u003e\n\u003cli\u003eDrought and exposed sites\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eShrub Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eMature Height\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e3–3.5 ft (1 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eMature Spread\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e3–3.5 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eGrowth Rate\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e0.5–1 ft per year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHardiness Zone\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4 (Ideal for Ontario and Eastern Canada Zones 4–7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSun Exposure\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFull sun\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSoil Preference\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHighly adaptable (clay, sandy, loam, humus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eWater Needs\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eModerate (regular first year)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eDrought Tolerance\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHigh once established\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eDeer Resistance\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLifespan\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e30–50+ years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eIs St. John’s Wort Right for Your Yard?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eChoose St. John’s Wort if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYou want colour and structure within 2–4 years\u003c\/li\u003e\n\u003cli\u003eYou have a small to medium yard\u003c\/li\u003e\n\u003cli\u003eYou live in Zones 4–7\u003c\/li\u003e\n\u003cli\u003eYou want bright summer flowers + drought tolerance\u003c\/li\u003e\n\u003cli\u003eYou need a shrub for foundation planting or a low hedge\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot ideal if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYou need a tall privacy hedge\u003c\/li\u003e\n\u003cli\u003eYou are planting in full shade\u003c\/li\u003e\n\u003cli\u003eYou want a fast-growing screen\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBest Uses\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFoundation planting\u003c\/li\u003e\n\u003cli\u003eLow hedge or border\u003c\/li\u003e\n\u003cli\u003eRock gardens\u003c\/li\u003e\n\u003cli\u003eUrban landscaping\u003c\/li\u003e\n\u003cli\u003ePollinator gardens\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy it works:\u003c\/strong\u003e\u003cbr\u003eIts compact, dense form makes it ideal for structured plantings, while its long-lasting flowers attract pollinators. Its tolerance to dry, poor soils makes it especially valuable in urban and low-maintenance landscapes.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat Makes St. John’s Wort Special?\u003c\/h2\u003e\n\u003cp\u003eA resilient native shrub that combines ornamental beauty with exceptional toughness.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSpring:\u003c\/strong\u003e Fresh blue-green foliage emerges\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSummer:\u003c\/strong\u003e Bright yellow flowers bloom abundantly\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFall:\u003c\/strong\u003e Subtle foliage tones and decorative seed capsules\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWinter:\u003c\/strong\u003e Fine branching structure adds texture\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWinter Survival in Ontario and Eastern Canada\u003c\/h2\u003e\n\u003cp\u003eYes, St. John’s Wort is hardy in Ontario and Eastern Canada Zones 4–7 and tolerates typical Canadian winter conditions including snow load and freezing temperatures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFirst-year tip:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd 2–3 inches of mulch\u003c\/li\u003e\n\u003cli\u003eWater deeply before the first hard frost\u003c\/li\u003e\n\u003cli\u003eConsider wind protection if your site is exposed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003ePlanting Guide for Ontario and Eastern Canada\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest planting time:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpring (April–June)\u003c\/li\u003e\n\u003cli\u003eEarly fall (September–October)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpacing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3–4 ft from foundations\u003c\/li\u003e\n\u003cli\u003e3–4 ft between plants\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWatering (first year):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWater deeply once per week for 6–8 weeks\u003c\/li\u003e\n\u003cli\u003eAdjust based on rainfall and soil drainage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eQuick Answers (FAQ)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow fast does St. John’s Wort grow in Ontario?\u003c\/strong\u003e\u003cbr\u003eTypically 0.5–1 ft per year in good conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it cold hardy in Ontario?\u003c\/strong\u003e\u003cbr\u003eYes. It is hardy to Zone 4 and performs well in Ontario and Eastern Canada Zones 4–7.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it need another tree for pollination?\u003c\/strong\u003e\u003cbr\u003eNo—flowers readily without another plant.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the roots invasive?\u003c\/strong\u003e\u003cbr\u003eNo, shallow and non-invasive.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it messy?\u003c\/strong\u003e\u003cbr\u003eNo—minimal litter, very clean shrub.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCompare With Similar Shrubs\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTree\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eGrowth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eKey Feature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBest For\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003ca href=\"https:\/\/arbresenligne.com\/en\/products\/st-johns-wort\" title=\"St-John's Wort (Hypericum kalmianum)\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/treesonline.ca\/products\/st-johns-wort\" title=\"St-John's Wort (Hypericum kalmianum)\"\u003eSt. John’s Wort\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSlow\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eYellow summer flowers\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSmall gardens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003ca href=\"https:\/\/arbresenligne.com\/en\/products\/shrubby-cinquefoil\" title=\"Shrubby Cinquefoil (Dasiphora fructicosa)\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/treesonline.ca\/products\/shrubby-cinquefoil\" title=\"Shrubby Cinquefoil (Dasiphora fructicosa)\"\u003eShrubby Cinquefoil\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eModerate\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLong flowering period\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBorders \u0026amp; mass planting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003ca href=\"https:\/\/arbresenligne.com\/en\/products\/bush-honeysuckle\" title=\"Bush Honeysuckle (Diervilla lonicera)\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/treesonline.ca\/products\/bush-honeysuckle\" title=\"Bush Honeysuckle (Diervilla lonicera)\"\u003eBush Honeysuckle\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFast\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cspan\u003eDry soil tolerance, yellow flowers, good fall colour\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cspan\u003eGroundcover, slopes, dry sites\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eShipping Across Quebec, Ontario and Atlantic Provinces\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNursery-grown\u003c\/li\u003e\n\u003cli\u003eCarefully packaged\u003c\/li\u003e\n\u003cli\u003eShipped to your door in Ontario and Eastern Canada\u003c\/li\u003e\n\u003cli\u003eHealthy root system guarantee (if applicable)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eExplore Related Collections\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/treesonline.ca\/collections\/deciduous-shrubs-of-eastern-canada\" title=\"Collection: Deciduous Shrubs of Eastern Canada\"\u003eDeciduous Shrubs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/treesonline.ca\/collections\/zone-4-plants-eastern-canada\" title=\"Collection: Hardiness Zone 4 Plants\"\u003eHardiness Zone 4 Plants\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRelated Articles\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBest Flowering Shrubs for Ontario Gardens\u003c\/li\u003e\n\u003cli\u003eTop Low-Maintenance Plants for Canadian Landscapes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Arbresenligne.com","offers":[{"title":"Small (100 ml)","offer_id":49198166245695,"sku":null,"price":3.95,"currency_code":"CAD","in_stock":true},{"title":"Large (310 ml)","offer_id":49198166278463,"sku":null,"price":6.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/8241\/1327\/files\/Arbuste-Millepertuis-de-kalm-illustration.jpg?v=1769898234","url":"https:\/\/treesonline.ca\/products\/st-johns-wort","provider":"Arbresenligne","version":"1.0","type":"link"}