{"id":4995,"date":"2018-08-10T19:51:50","date_gmt":"2018-08-11T00:51:50","guid":{"rendered":"https:\/\/www.berger.ca\/en\/?p=4995"},"modified":"2025-04-01T16:36:25","modified_gmt":"2025-04-01T21:36:25","slug":"mix-selection-criteria","status":"publish","type":"post","link":"https:\/\/www.berger.ca\/en\/grower-resources\/hints-and-tips\/mix-selection-criteria\/","title":{"rendered":"Mix Selection Criteria"},"content":{"rendered":"<h2>Substrate Selection Criteria<\/h2>\n<h4><span style=\"color: #88ac2e\">Criteria n<sup>o<\/sup>1<\/span><\/h4>\n<h3>Type of Production<\/h3>\n<p>The first criteria to take into consideration when selecting the ideal substrate for your production needs is the sector of activity. The characteristics of a growing media used to produce a Holly tree (<i>Ilex<\/i>) in a nursery will greatly differ to those required to produce an Orchid (<i>Orchidaceae<\/i>) in a greenhouse. <strong>Interior productions give a lot of control to growers, allowing them to steer productions towards specific results.<\/strong> Exterior productions are cheaper, but the grower loses some control as the crops are at the mercy of the weather, therefore substrates must be more forgiving to compensate for bad meteorological conditions. It is important to determine the type of production in order to narrow the types of substrates that could be used adequately.<\/p>\n<div class=\"wysiwyg-row\"><br \/>\n<div class=\"column-5\"><\/p>\n<h4><strong>\u00a0<\/strong><strong>Greenhouse Production<\/strong><\/h4>\n<ul>\n<li>Vegetables (Olericulture)<\/li>\n<li>Bedding and Garden plants (Annuals \u2013 Cell-pack)<\/li>\n<li>Potted Flower Plants (Annuals)<\/li>\n<li>Cut Flowers<\/li>\n<li>Organic<\/li>\n<li>Vegetable transplants<\/li>\n<li>Plugs, Pre-formed plugs &amp; Ellepots<\/li>\n<li>Indoor\/Foliage potted plants<\/li>\n<\/ul>\n<p><\/div><br \/>\n<div class=\"column-3\"><\/p>\n<h4><strong>\u00a0<\/strong><strong>Nursery Production<\/strong><\/h4>\n<ul>\n<li>Ornamental<\/li>\n<li>Perennial<\/li>\n<li>Trees &amp; Shrubs<\/li>\n<li>Forestery<\/li>\n<\/ul>\n<h4><strong>\u00a0<\/strong><strong>Outdoor Landscaping<\/strong><\/h4>\n<ul>\n<li>Soil amendments<\/li>\n<\/ul>\n<p><\/div><\/p>\n<p><div class=\"column-4\"><\/p>\n<h4><strong>\u00a0<\/strong><strong>Indoor Landscaping<\/strong><\/h4>\n<ul>\n<li>Growing mix for malls, public buildings, \u2026<\/li>\n<\/ul>\n<p><\/div><br \/>\n<\/div>\n<p><div class=\"wysiwyg-row\"><br \/>\n<div class=\"column-8\"><\/p>\n<h4><span style=\"color: #88ac2e\">Criteria n<sup>o<\/sup>2<\/span><\/h4>\n<h3>Type of Container<\/h3>\n<p>The second criterion to consider is the type of container to be used. If we look at the height of the saturation zone in containers of different sizes, it is identical for all for all of them. However, the percentage of the mix that the saturation zone represents depends on the diameter and height of the container. Therefore, the geometry of a container has a significant influence on water management, and thus the type of substrate should be chosen in consequence. Obviously, the particle size of the substrate will be the driving force. Uniformly filling out 200 cavity plug trays with a mix that contains very large particles would be frustrating, which is why growers normally use a seedling mix made from fine components for this application. On the other hand, filling out a 1 gallon pot with a fine particles would be easy, but there would be hardly any air space in the container due to the lack of larger chunks of material and the saturation zone would greatly increase. <strong>Selection of a growing media should take into consideration the dimensions of the containers that will be filled to make sure they match up correctly.<\/strong><\/p>\n<p><\/div><\/p>\n<div class=\"column-4\"><\/p>\n<h4><strong>\u00a0<\/strong><strong>Seedling Trays, Cell-Packs &amp; Small Pots<\/strong><\/h4>\n<ul>\n<li>&lt; 1 gallon<\/li>\n<\/ul>\n<h4><strong>\u00a0<\/strong><strong>Large Pots<\/strong><\/h4>\n<ul>\n<li>&gt; 1 gallon<\/li>\n<\/ul>\n<p><\/div>\n<p><\/div><br \/>\n<div class=\"wysiwyg-row\"><br \/>\n<div class=\"column-8\"><\/p>\n<h4><span style=\"color: #88ac2e\">Criteria n<sup>o<\/sup>3<\/span><\/h4>\n<h3>Environmental Conditions<\/h3>\n<p>North America is a large continent that contains numerous regions of wide-ranging climates. Although there are concentrated areas, greenhouse and nursery producers are sprinkled all across these climates, yet they produce similar crops. Two different growers producing the same crop in identical containers won\u2019t necessarily use the same mix if they are located in very different environments. If one is in Texas and the other is in Minnesota, their substrate needs won\u2019t be the same. The season in which the production is scheduled will also play a major role in selecting the appropriate mix. <strong>A grower using a particular substrate in summer would probably use a different mix to produce the same crop in the summer.<\/strong> Once again, the physical characteristics of the substrate will be the focal point here.<br \/>\n<\/div><\/p>\n<div class=\"column-4\">\n<h4><strong>\u00a0<\/strong><strong>Season<\/strong><\/h4>\n<ul>\n<li>(summer, winter, spring or fall)<\/li>\n<\/ul>\n<h4><strong>\u00a0<\/strong><strong>Geographic location <\/strong><\/h4>\n<ul>\n<li>(Eastern Canada, South-West USA, \u2026)<\/li>\n<\/ul>\n<p><\/div><br \/>\n<\/div><\/p>\n<div class=\"wysiwyg-row\"><br \/>\n<div class=\"column-8\"><\/p>\n<h4><span style=\"color: #88ac2e\">Criteria n<sup>o<\/sup>4<\/span><\/h4>\n<h3>Cultural Particularities<\/h3>\n<h4>High pH, Low pH, Extra fertilizer and No Phosphorus<\/h4>\n<p><strong>Different crops have different needs; Petunias are iron inefficient and will prefer a lower pH while geraniums are iron efficient and will favor a higher pH.<\/strong> The type of fertilizer (acid or alkaline) and quality of the water used for irrigations will also affect how the pH of the soil evolves throughout the production cycle. It is important to take into consideration all these factors before selecting the initial chemical characteristics for the chosen mix. Certain crops are sensitive to the presence of particular components while other require specific nutrients in higher quantities for precise functions. For instance, Blue Hydrangeas require higher concentrations of aluminum to achieve their coloration. It is important to know the cultural particularities of your production in order to select the substrate that will allow you to achieve high quality results.<br \/>\n<\/div><\/p>\n<p><div class=\"column-4\"><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5325\" title=\"substrate selection criteria: blue hydrangea\" src=\"https:\/\/www.berger.ca\/en\/wp-content\/uploads\/sites\/2\/2018\/11\/bkg_hydrangea_blue-300x150.jpg\" alt=\"Blue Hydrangea\" width=\"400\" height=\"200\" srcset=\"https:\/\/www.berger.ca\/en\/wp-content\/uploads\/sites\/2\/2018\/11\/bkg_hydrangea_blue-300x150.jpg 300w, https:\/\/www.berger.ca\/en\/wp-content\/uploads\/sites\/2\/2018\/11\/bkg_hydrangea_blue-768x384.jpg 768w, https:\/\/www.berger.ca\/en\/wp-content\/uploads\/sites\/2\/2018\/11\/bkg_hydrangea_blue-1024x512.jpg 1024w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><br \/>\n<\/div><br \/>\n<\/div>\n<div class=\"wysiwyg-row\"><br \/>\n<div class=\"column-8\"><\/p>\n<h4><span style=\"color: #88ac2e\">Criteria n<sup>o<\/sup>5<\/span><\/h4>\n<h3>Irrigation Practices<\/h3>\n<p>Oxygen and water are both essential to provide a balanced environment for healthy root development. The physical properties of a growing media will have a major impact on how these two elements are delivered to the root system.<strong> It is important to select a mix with a particle size and porosity that are well adapted to your irrigation system.<\/strong> For example, certain substrates have a better wicking ability which makes them ideal for sub-irrigation. How often a grower irrigates and how much water he adds per irrigation also play a major role in selecting the correct media. A grower who prefers frequently adding small amounts of water (Dry grower) won\u2019t need the same mix as one who occasionally irrigates with large amounts of water (Wet grower). It is important to take all these factors into consideration when selecting the appropriate substrate.<br \/>\n<\/div><\/p>\n<p><div class=\"column-4\"><\/p>\n<h4><strong>Type of Irrigation System<\/strong><\/h4>\n<ul>\n<li>(dripper system, overhead system, inundation system, \u2026)<\/li>\n<\/ul>\n<h4><strong>Heavy or light irrigations<\/strong><\/h4>\n<ul>\n<li>(wet grower vs. dry grower)<\/li>\n<\/ul>\n<p><\/div><br \/>\n<\/div>\n<h4><span style=\"color: #88ac2e\">Criteria n<sup>o<\/sup>6<\/span><\/h4>\n<h3>Consistency and After Sales Services<\/h3>\n<h4>Quality Control, Analytical Support and Technical Support<\/h4>\n<p>There are many mix companies that offer a great variety of substrates on the market. <strong>However, not all companies offer a guarantee of consistency as well as a battery of after sales services.<\/strong> These factors aren\u2019t always taken into consideration when selecting a commodity (especially one generally viewed as \u201cexpensive dirt\u201d). However, having free access to the services of a high tech analytical laboratory and the advice of highly experienced experts can be just the edge required to propel your organization to new heights. Consistency is also an extremely important factor. If the substrate is inconsistent, it will react differently from area to area and the grower will obtain uneven plants growing throughout his operation. To obtain dependable result, a grower needs a uniform mix from a company with a stringent quality control system. Is you mix supplier accountable?<\/p>\n<div class=\"wysiwyg-row\"><br \/>\n<a class=\"button\" href=\"https:\/\/www.berger.ca\/en\/newsletter\/\" target=\"_blank\">Subscribe to our newsletter<\/a><br \/>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Substrate Selection Criteria Criteria no1 Type of Production The first criteria to take into consideration when selecting the ideal substrate for your production needs is the sector of activity. The characteristics of a growing media used to produce a Holly tree (Ilex) in a nursery will greatly differ to those required to produce an Orchid (Orchidaceae) in a greenhouse. Interior productions give a lot of control to growers, allowing them to steer productions towards specific results. Exterior productions are cheaper, but the grower loses some control as the crops are at the mercy of the weather, therefore substrates must be more forgiving to compensate for bad meteorological conditions. It is important to determine the type of production in order to narrow the types of substrates that could be used adequately. Criteria no6 Consistency and After Sales Services Quality Control, Analytical [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":3186,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[357,358,359],"tags":[261,265,82,74,276,267,76,266,260,263,264,262],"class_list":["post-4995","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-berries","category-horticulture","category-leafy-greens","tag-container","tag-cultural","tag-fertilizer","tag-greenhouse","tag-mix-selection-criteria","tag-nursery","tag-ph","tag-practices","tag-production","tag-season","tag-seedling","tag-tray"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mix Selection Criteria - Berger - EN<\/title>\n<meta name=\"description\" content=\"The first criteria to take into consideration when selecting the ideal substrate for your production needs is the sector of activity.\" \/>\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.berger.ca\/en\/grower-resources\/hints-and-tips\/mix-selection-criteria\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mix Selection Criteria - 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