{"id":1891,"date":"2014-06-19T09:42:28","date_gmt":"2014-06-19T13:42:28","guid":{"rendered":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/?p=1891"},"modified":"2022-05-31T13:37:54","modified_gmt":"2022-05-31T17:37:54","slug":"garlic-mustard","status":"publish","type":"post","link":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/","title":{"rendered":"Garlic Mustard"},"content":{"rendered":"
\"picture<\/a>

Garlic mustard
Photo credit – PB\/Lafayette, Ind.<\/p><\/div>\n

Q.<\/strong> Could you tell me about the weed in the attached photo? I see them everywhere. Last year at the Celery Bog park, I noticed big piles of them where someone
\nhad gone through and pulled them. Is it something new to our area in recent years? And is it considered invasive? – PB, Lafayette, Ind.<\/span><\/p>\n

A.<\/strong> This notorious pest is called garlic mustard; it’s an invasive, biennial species that quickly colonizes where it lands. Biennials produce foliage the first
\ngrowing season, flowers and seeds the second year, and then that plant dies. What makes this species so invasive is that its seedpods pop open to release
\nhundreds of seeds, and, thus, a single plant can form a colony in just a couple of years.<\/span><\/p>\n

The key to control is to prevent the plants from going to seed. The plant is easy to pull, especially following a rain. Repeated cutting back of the
\nsecond-year flower stalks will also prevent seed formation.<\/p>\n

More information on garlic mustard is available at http:\/\/extension.entm.purdue.edu\/CAPS\/pestInfo\/garlicMustard.htm<\/p>\n

Q.<\/strong> I read with great interest your article about winter burn on shrubs. I have a rhododendron that was my grandmother’s, and she passed away many years ago. I
\nwould love to save it if at all possible, but I am not sure what to do. It has both green and brown leaves on it. Should I prune it back, or just leave it
\nalone? Any advice you can give will be greatly appreciated. – SK, Derby, Ind. <\/span><\/p>\n

A.<\/strong> The toll on our landscape plants from this past winter is still revealing itself, and I suspect we will continue to see some plant damage as summer heat
\nand dry spells come on. Injured plants will need all available green foliage for photosynthetic production of carbohydrate reserves to help with recovery.
\nDead stems can be removed any time, but conservative pruning of even partially green twigs and branches is advised. You can always prune more after the
\nfull extent of injury and potential for recovery is realized. Read on for a bit more on this topic.<\/p>\n

Q.<\/strong> I read with interest your May column where you mentioned holly as being most susceptible to this past winter’s extreme temperatures. My lovely holly, which
\nhas been around for at least 10 years, had at least three-fourths of it damaged. Leaves have turned brown and are dropping off. Will it grow back if I cut
\nit off 18 inches or more, or should it be replaced? \u2013 SH<\/p>\n

\"Picture<\/a>

Holly winter injury
Photo credit – Rosie Lerner\/Purdue Extension<\/p><\/div>\n

A.<\/strong> I think it is a bit too soon to know whether the plant will fully recover, or if it would be best to replant anew. Dead stems can be removed any time, but
\nif the plant is to recover, it will need as much carbohydrate reserves as it can muster. Drastic pruning back to 18 inches would likely deplete what few
\nreserves it has. <\/span><\/p>\n

A more conservative approach would be to remove any dead or badly damaged branches and retain as much of the green foliage as possible until it can recover
\na bit. If all goes well, next year you can do a more gentile, renewal pruning, consisting of removing about one-third of the oldest (largest) branches back
\nto a few inches. Repeat this approach annually and by the end of the third year, the entire plant has been rejuvenated. Additional information on pruning
\nornamental trees and shrubs is available at http:\/\/www.hort.purdue.edu\/ext\/ho-4.pdf<\/a>.<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Q. Could you tell me about the weed in the attached photo? I see them everywhere. Last year at the Celery Bog park, I noticed big piles of them where someone had gone through and pulled them. Is it something new to our area in recent years? And is it considered invasive? – PB, Lafayette, Ind. A. This notorious pest is called garlic mustard; it’s an invasive, biennial species that quickly colonizes where it lands….Read more about Garlic Mustard<\/span>[Read More]<\/a><\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"coauthors":[46],"class_list":["post-1891","post","type-post","status-publish","format-standard","hentry","category-uncategorized","publication-in-the-grow"],"acf":[],"yoast_head":"\nGarlic Mustard - Indiana Yard and Garden - Purdue Consumer Horticulture<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Garlic Mustard - Indiana Yard and Garden - Purdue Consumer Horticulture\" \/>\n<meta property=\"og:description\" content=\"Q. Could you tell me about the weed in the attached photo? I see them everywhere. Last year at the Celery Bog park, I noticed big piles of them where someone had gone through and pulled them. Is it something new to our area in recent years? And is it considered invasive? – PB, Lafayette, Ind. A. This notorious pest is called garlic mustard; it’s an invasive, biennial species that quickly colonizes where it lands....Read more about Garlic Mustard[Read More]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/\" \/>\n<meta property=\"og:site_name\" content=\"Indiana Yard and Garden - Purdue Consumer Horticulture\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Purdue-Home-Hort-716960998353855\/\" \/>\n<meta property=\"article:published_time\" content=\"2014-06-19T13:42:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-05-31T17:37:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard-300x225.jpg\" \/>\n<meta name=\"author\" content=\"Rosie Lerner\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@PurdueHomeHort\" \/>\n<meta name=\"twitter:site\" content=\"@PurdueHomeHort\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rosie Lerner\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/\"},\"author\":{\"name\":\"Rosie Lerner\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#\/schema\/person\/477baba12dde3a697415f60d785c9b1b\"},\"headline\":\"Garlic Mustard\",\"datePublished\":\"2014-06-19T13:42:28+00:00\",\"dateModified\":\"2022-05-31T17:37:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/\"},\"wordCount\":614,\"publisher\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard-300x225.jpg\",\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/\",\"url\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/\",\"name\":\"Garlic Mustard - Indiana Yard and Garden - Purdue Consumer Horticulture\",\"isPartOf\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard-300x225.jpg\",\"datePublished\":\"2014-06-19T13:42:28+00:00\",\"dateModified\":\"2022-05-31T17:37:54+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#primaryimage\",\"url\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard.jpg\",\"contentUrl\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard.jpg\",\"width\":2048,\"height\":1536,\"caption\":\"Garlic mustard Photo credit - PB\/Lafayette, Ind.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Garlic Mustard\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#website\",\"url\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/\",\"name\":\"Indiana Yard and Garden - Purdue Consumer Horticulture\",\"description\":\"A Purdue Extension Service for Home Gardeners\",\"publisher\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#organization\",\"name\":\"Indiana Yard and Garden \u2013 Purdue Consumer Horticulture\",\"url\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2021\/03\/PU-H-Full-RGB.png\",\"contentUrl\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2021\/03\/PU-H-Full-RGB.png\",\"width\":1257,\"height\":225,\"caption\":\"Indiana Yard and Garden \u2013 Purdue Consumer Horticulture\"},\"image\":{\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/Purdue-Home-Hort-716960998353855\/\",\"https:\/\/x.com\/PurdueHomeHort\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#\/schema\/person\/477baba12dde3a697415f60d785c9b1b\",\"name\":\"Rosie Lerner\",\"url\":\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/author\/rosie\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Garlic Mustard - Indiana Yard and Garden - Purdue Consumer Horticulture","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/","og_locale":"en_US","og_type":"article","og_title":"Garlic Mustard - Indiana Yard and Garden - Purdue Consumer Horticulture","og_description":"Q. Could you tell me about the weed in the attached photo? I see them everywhere. Last year at the Celery Bog park, I noticed big piles of them where someone had gone through and pulled them. Is it something new to our area in recent years? And is it considered invasive? – PB, Lafayette, Ind. A. This notorious pest is called garlic mustard; it’s an invasive, biennial species that quickly colonizes where it lands....Read more about Garlic Mustard[Read More]","og_url":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/","og_site_name":"Indiana Yard and Garden - Purdue Consumer Horticulture","article_publisher":"https:\/\/www.facebook.com\/Purdue-Home-Hort-716960998353855\/","article_published_time":"2014-06-19T13:42:28+00:00","article_modified_time":"2022-05-31T17:37:54+00:00","og_image":[{"url":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard-300x225.jpg","type":"","width":"","height":""}],"author":"Rosie Lerner","twitter_card":"summary_large_image","twitter_creator":"@PurdueHomeHort","twitter_site":"@PurdueHomeHort","twitter_misc":{"Written by":"Rosie Lerner","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#article","isPartOf":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/"},"author":{"name":"Rosie Lerner","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#\/schema\/person\/477baba12dde3a697415f60d785c9b1b"},"headline":"Garlic Mustard","datePublished":"2014-06-19T13:42:28+00:00","dateModified":"2022-05-31T17:37:54+00:00","mainEntityOfPage":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/"},"wordCount":614,"publisher":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#organization"},"image":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#primaryimage"},"thumbnailUrl":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard-300x225.jpg","inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/","url":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/","name":"Garlic Mustard - Indiana Yard and Garden - Purdue Consumer Horticulture","isPartOf":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#primaryimage"},"image":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#primaryimage"},"thumbnailUrl":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard-300x225.jpg","datePublished":"2014-06-19T13:42:28+00:00","dateModified":"2022-05-31T17:37:54+00:00","breadcrumb":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#primaryimage","url":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard.jpg","contentUrl":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2014\/06\/garlic_mustard.jpg","width":2048,"height":1536,"caption":"Garlic mustard Photo credit - PB\/Lafayette, Ind."},{"@type":"BreadcrumbList","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/garlic-mustard\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/"},{"@type":"ListItem","position":2,"name":"Garlic Mustard"}]},{"@type":"WebSite","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#website","url":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/","name":"Indiana Yard and Garden - Purdue Consumer Horticulture","description":"A Purdue Extension Service for Home Gardeners","publisher":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#organization","name":"Indiana Yard and Garden \u2013 Purdue Consumer Horticulture","url":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#\/schema\/logo\/image\/","url":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2021\/03\/PU-H-Full-RGB.png","contentUrl":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2021\/03\/PU-H-Full-RGB.png","width":1257,"height":225,"caption":"Indiana Yard and Garden \u2013 Purdue Consumer Horticulture"},"image":{"@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/Purdue-Home-Hort-716960998353855\/","https:\/\/x.com\/PurdueHomeHort"]},{"@type":"Person","@id":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/#\/schema\/person\/477baba12dde3a697415f60d785c9b1b","name":"Rosie Lerner","url":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/author\/rosie\/"}]}},"_links":{"self":[{"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/posts\/1891","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/comments?post=1891"}],"version-history":[{"count":5,"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/posts\/1891\/revisions"}],"predecessor-version":[{"id":10647,"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/posts\/1891\/revisions\/10647"}],"wp:attachment":[{"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/media?parent=1891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/categories?post=1891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/tags?post=1891"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-json\/wp\/v2\/coauthors?post=1891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}