{"id":1754,"date":"2011-08-23T12:00:49","date_gmt":"2011-08-23T16:00:49","guid":{"rendered":"http:\/\/www.whatgrowsthere.com\/grow\/?p=1754"},"modified":"2011-08-23T11:07:26","modified_gmt":"2011-08-23T15:07:26","slug":"kousa-dogwood-not-summer-heat-tolerant","status":"publish","type":"post","link":"https:\/\/whatgrowsthere.com\/grow\/2011\/08\/23\/kousa-dogwood-not-summer-heat-tolerant\/","title":{"rendered":"Kousa Dogwood Not Summer Heat Tolerant"},"content":{"rendered":"<div id=\"attachment_1771\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2011\/08\/IMG_1825.jpg\"><img aria-describedby=\"caption-attachment-1771\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-1771\" title=\"IMG_1825\" src=\"https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2011\/08\/IMG_1825-300x168.jpg\" alt=\"\" width=\"300\" height=\"168\" srcset=\"https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2011\/08\/IMG_1825-300x168.jpg 300w, https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2011\/08\/IMG_1825-1024x575.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-1771\" class=\"wp-caption-text\">Kousa dogwood summer foliage<\/p><\/div>\n<p>Chinese (Kousa) dogwood (<em>Cornus kousa<\/em>) rates four stars (out of four)\u00a0as a beautiful small flowering landscape tree. Since the 1970\u2019s,\u00a0a deadly anthracnose (<em>Discula spp.<\/em>) fungus disease has threatened to eradicate our native flowering dogwood (<em>C. florida<\/em>). Kousa dogwood rates as a highly disease resistant alternative. Its Achilees\u2019 heel is its less than stellar foliar heat tolerance.<\/p>\n<p>In the Southern Appalachian region (USDA zones 6 and 7) most kousa seed-produced cultivars do not handle summer heat issues well.\u00a0 Leaves curl up and reduces photosynthesis. Leaf tips and edges may also scorch. Many of the 100 + kousa cultivars listed in Cappiello and Shadow\u2019s book on dogwoods* are not heat tolerant in the mid-South.<\/p>\n<p>Newly-planted trees are\u00a0both heat and drought susceptible and should be irrigated the first two years after planting. Cooling the soil\u00a0by watering helps. Irrigate weekly from mid-June thru early September\u00a0when summer temps are consistently in the 90&#8217;s and natural rainfall is deficient. Drip irrigation keeps kousa foliage dry and disease free\u00a0while conserving water usage.<\/p>\n<p>A number of U.S. nurseries are currently evaluating several, still unnamed, seedling selections which may be more heat and drought\u00a0tolerant\u00a0in the Southeast U.S. landscapes. Expect to see\u00a0a few\u00a0at local garden centers in the next 4 &#8211; 5 years.<\/p>\n<p>* Cappiello, Paul E. and Don Shadow. 2005. Dogwoods. Timber Press. Portland, OR<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chinese (Kousa) dogwood (Cornus kousa) rates four stars (out of four)\u00a0as a beautiful small flowering landscape tree. Since the 1970\u2019s,\u00a0a deadly anthracnose (Discula spp.) fungus disease has threatened to eradicate our native flowering dogwood (C. florida). Kousa dogwood rates as a highly disease resistant alternative. Its Achilees\u2019 heel is its less than stellar foliar heat [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[669,674,774,630,705,646,7,113],"tags":[],"_links":{"self":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/1754"}],"collection":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/comments?post=1754"}],"version-history":[{"count":15,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/1754\/revisions"}],"predecessor-version":[{"id":1784,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/1754\/revisions\/1784"}],"wp:attachment":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/media?parent=1754"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/categories?post=1754"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/tags?post=1754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}