{"id":27723,"date":"2023-06-22T17:49:48","date_gmt":"2023-06-22T17:49:48","guid":{"rendered":"https:\/\/aes.colostate.edu\/divi-wcrc\/?page_id=27723"},"modified":"2026-04-02T16:35:26","modified_gmt":"2026-04-02T16:35:26","slug":"cold-hardiness-update","status":"publish","type":"page","link":"https:\/\/aes.colostate.edu\/wcrc\/orchard-mesa\/viticulture\/cold-hardiness-update\/","title":{"rendered":"Cold Hardiness Update"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;20px||30px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;2_5,3_5&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; collapsed=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;2_5&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_sidebar area=&#8221;et_pb_widget_area_15&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_sidebar][\/et_pb_column][et_pb_column type=&#8221;3_5&#8243; _builder_version=&#8221;4.16&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;Squiggle &#8211; Aligned Left&#8221; _builder_version=&#8221;4.16.0&#8243; _module_preset=&#8221;default&#8221; header_text_align=&#8221;center&#8221; background_enable_color=&#8221;off&#8221; custom_padding=&#8221;1%||1%||true|false&#8221; saved_tabs=&#8221;all&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n\t\t<div style=\"width: 146px; height: 8px; max-width: 100%; position: relative;\">\n\t\t\t<svg\n                width=\"100%\"\n                height=\"100%\"\n                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                x=\"0\" y=\"0\"\n                viewBox=\"0 0 145.1 8\"\n                xml:space=\"preserve\"\n                style=\"position: absolute; top: 0\"\n            >\n\t\t\t\t<path\n\t\t\t\t\td=\"M144.1 4c-3.6 3.3-10.7 3.3-14.3 0S119.1.7 115.5 4s-10.7 3.3-14.3 0S90.4.7 86.9 4 76.1 7.3 72.6 4 61.8.7 58.3 4 47.5 7.3 43.9 4 33.2.7 29.6 4 18.9 7.3 15.3 4 4.6.7 1 4\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"#f15727\"\n\t\t\t\t\tstroke-width=\"3\"\n\t\t\t\t\/>\n\t\t\t<\/svg>\n\t\t<\/div>\n\t\t\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; text_line_height=&#8221;1.6em&#8221; header_font=&#8221;||||||||&#8221; header_font_size=&#8221;36px&#8221; header_line_height=&#8221;1.4em&#8221; header_2_font=&#8221;||||||||&#8221; header_2_font_size=&#8221;26.1px&#8221; header_font_size_tablet=&#8221;30px&#8221; header_font_size_phone=&#8221;32px&#8221; header_font_size_last_edited=&#8221;on|tablet&#8221; header_2_font_size_tablet=&#8221;20px&#8221; header_2_font_size_phone=&#8221;18px&#8221; header_2_font_size_last_edited=&#8221;on|phone&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>Cold Hardiness Update<\/h1>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_5,3_5,1_5&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_column][et_pb_column type=&#8221;3_5&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/aes.colostate.edu\/wcrc\/wp-content\/uploads\/sites\/147\/2026\/04\/OrchMesTable.png&#8221; alt=&#8221;Table of cold hardiness data&#8221; title_text=&#8221;OrchMesTable&#8221; show_in_lightbox=&#8221;on&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/aes.colostate.edu\/wcrc\/wp-content\/uploads\/sites\/147\/2026\/04\/OrchMesGraph-scaled.png&#8221; alt=&#8221;cold hardiness graph of Chardonnay grapes&#8221; title_text=&#8221;OrchMesGraph&#8221; show_in_lightbox=&#8221;on&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Daily maximum and minimum temperatures recorded at the Western Colorado Research Center &#8211; Orchard Mesa near Grand Junction, Colorado, and critical temperatures for a 10% bud kill (LT10) estimated from the Table above. The dashed lines represent predicted values for LT10 based on curves fitted to previous years\u2019 data. Temperature data for various locations within the Grand Valley can be found at <a title=\"Temperature data for various locations within the Grand Valley\" href=\"http:\/\/www.winecolorado.org\/colorado-grape-growing\/weather-station-network\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.winecolorado.org\/colorado-grape-growing\/weather-station-network\/<\/a>. Meteorological data from other locations throughout Colorado may also be available from the Colorado Agricultural Meteorological Network \u2013\u00a0<a title=\"COAGMET\" href=\"http:\/\/coagmet.colostate.edu\" target=\"_blank\" rel=\"noopener noreferrer\">COAGMET<\/a>.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_2,1_2&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/aes.colostate.edu\/wcrc\/wp-content\/uploads\/sites\/147\/2026\/04\/Chardonnay-scaled.png&#8221; alt=&#8221;cold hardiness graph of Chardonnay grapes&#8221; title_text=&#8221;Chardonnay&#8221; show_in_lightbox=&#8221;on&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_image][\/et_pb_column][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/aes.colostate.edu\/wcrc\/wp-content\/uploads\/sites\/147\/2026\/04\/Syrah-scaled.png&#8221; alt=&#8221;cold hardiness graph of Syrah grapes&#8221; title_text=&#8221;Syrah&#8221; show_in_lightbox=&#8221;on&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.20.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Fig. 3: Daily maximum and minimum temperatures recorded at the Western Colorado Research Center &#8211; Orchard Mesa near Grand Junction, Colorado, and critical temperatures for a 10 % (LT<sub>10<\/sub>), 50 % (LT<sub>50<\/sub>) and 90 % (LT<sub>90<\/sub>) bud kill for varieties &#8216;Chardonnay&#8217; and &#8216;Syrah&#8217;.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\t\t<div style=\"width: 146px; height: 8px; max-width: 100%; position: relative;\">\n\t\t\t<svg\n                width=\"100%\"\n                height=\"100%\"\n                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                x=\"0\" y=\"0\"\n                viewBox=\"0 0 145.1 8\"\n                xml:space=\"preserve\"\n                style=\"position: absolute; top: 0\"\n            >\n\t\t\t\t<path\n\t\t\t\t\td=\"M144.1 4c-3.6 3.3-10.7 3.3-14.3 0S119.1.7 115.5 4s-10.7 3.3-14.3 0S90.4.7 86.9 4 76.1 7.3 72.6 4 61.8.7 58.3 4 47.5 7.3 43.9 4 33.2.7 29.6 4 18.9 7.3 15.3 4 4.6.7 1 4\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"#f15727\"\n\t\t\t\t\tstroke-width=\"3\"\n\t\t\t\t\/>\n\t\t\t<\/svg>\n\t\t<\/div>\n\t\tCold Hardiness Update &nbsp;Daily maximum and minimum temperatures recorded at the Western Colorado Research Center &#8211; Orchard Mesa near Grand Junction, Colorado, and critical temperatures for a 10% bud kill (LT10) estimated from the Table above. The dashed lines represent predicted values for LT10 based on curves fitted to previous years\u2019 data. Temperature data for [&hellip;]<\/p>\n","protected":false},"author":260,"featured_media":0,"parent":25245,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-27723","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cold Hardiness Update<\/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:\/\/aes.colostate.edu\/wcrc\/orchard-mesa\/viticulture\/cold-hardiness-update\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cold Hardiness Update\" \/>\n<meta property=\"og:description\" content=\"Cold Hardiness Update &nbsp;Daily maximum and minimum temperatures recorded at the Western Colorado Research Center - Orchard Mesa near Grand Junction, Colorado, and critical temperatures for a 10% bud kill (LT10) estimated from the Table above. 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