As strawberry cultivation advances within CEA and covered systems, so does the requirements for a soil-less growing medium that can optimize both water and nutrient uptake, while also keeping plants healthy. To be clear these are strawberry plants that are not directly grown in the field\/ground and include the production of strawberry transplants as well as production, fruit bearing crops. <\/p>\n Strawberry cultivation requires a combination of precision, care, and advanced techniques to consistently produce high-quality fruit. At Berger, our research into growing media and water management has provided important insights into optimizing strawberry production, particularly within soilless systems. In this article we will review our findings when we compared strawberry production in different growing media including mixes of coir, peat and wood fiber. <\/strong><\/p>\n Let\u2019s first look at how soilless growing systems can offer advantages for strawberry production, providing growers with greater control over environmental variables and enabling cultivation in diverse settings. Advantages include:<\/p>\n For strawberries to thrive, their unique physiological needs must be met, which includes selecting the right growing media. Berger\u2019s research highlights the following key characteristics that are essential for optimal growth:<\/p>\n <\/div> In our trials, a variety of growing media were tested to evaluate their suitability for strawberry cultivation. Our research into growing media and water management, with a focus on the popular cultivar Albion, provides valuable insights into optimizing soilless strawberry production across various systems. Berger\u2019s greenhouse trials tested several growing media combinations to assess their impact on strawberry performance. <\/p>\n <\/div><\/p>\n The trials demonstrated that peat-based growing media often outperform coir alone, with peat\u2019s ability to support a higher air porosity and better water retention leading to improved results in both yield and fruit quality. A water retention curve describes how much water a growing medium holds at varying levels of matric potential (the tension at which water is held within the medium). This data is essential for tailoring irrigation strategies to match the unique properties of each medium. Berger\u2019s trials measured water retention across different media blends, revealing distinct dynamics: <\/div><\/p>\n
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\n The Advantages of Soilless Cultivation <\/h4>\n
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\ngrowers can cultivate strawberries in regions that are unsuitable for traditional field farming. <\/li>\n<\/h2>\n
\nGrowers can now utilize more ergonomic systems such as waist-high benches, helping to reducing physical strain. <\/li>\n<\/h2>\n
\nGain more control over fruit firmness, flavor, and shelf life. <\/li>\n<\/h2>\n
\nReduce risks associated with soil-borne pathogens, promoting healthier crops with less pesticide applications. <\/li>\n\n<\/div><\/p>\n
The Role of Growing Media <\/h4>\n
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\nA low electrical conductivity (EC < 2 mS\/cm) and a narrow pH range (6.0\u20136.2) are critical for proper nutrient uptake and plant health. <\/li>\n<\/h2>\n
\nThe shallow, fine roots of strawberries need excellent contact with the growing medium for healthy root development. <\/li>\n<\/h2>\n
\nHigh porosity ensures proper root aeration, enhancing both fruit yield and quality.<\/li>\n<\/ul>\n
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Results from Berger\u2019s Growing Media Trials <\/h3>\n
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\nThis blend demonstrated strong performance, delivering high yield, large fruit size, and an excellent Brix index. <\/li>\n<\/h2>\n
\nAnother high-performing blend that offered consistent aeration and moisture retention, ensuring optimal root growth and fruit development.<\/li>\n<\/h2>\n
\nWhile coir provided good performance in some trials, it was outperformed by peat-based blends in terms of yield and fruit size. <\/li>\n<\/h2>\n
\nThis combination provided excellent water retention and stability, yielding high-quality fruit with a balanced flavor profile. <\/li>\n<\/ul>\n<\/h2>\n
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\n \n Berger Growing Media <\/h4>\n<\/td>\n
\n Yield (g\/plant)<\/h4>\n<\/td>\n
\n Berry Weight (g\/fruit)<\/h4>\n<\/td>\n
\n Brix (\u00b0)<\/h4>\n<\/td>\n<\/tr>\n
\n BM5 Natural Fiber & Aggregate – Wood Super HP<\/strong> Peat:Wood Fiber:Perlite (60:25:15)<\/td>\n 1075<\/strong><\/td>\n 14.5<\/strong><\/td>\n 7.2<\/td>\n<\/tr>\n \n \nBM4 Natural Fiber – Wood & Coir HP<\/strong> Peat:Wood Fiber:Coir (60:25:15)<\/td>\n 1033<\/td>\n 14.0<\/td>\n 7.3<\/td>\n<\/tr>\n \n \n BM4w<\/sup> Natural Fiber – Coir HP <\/strong> Coir 100%<\/td>\n 1030<\/td>\n 13.8<\/td>\n 7.2<\/td>\n<\/tr>\n \n \n BM4w<\/sup> Natural Fiber – Wood & Coir HP <\/strong>Peat:Coir:Wood Fiber (40:40:20)<\/td>\n 991 <\/td>\n 13.5<\/td>\n 7.5<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/h2>\n
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Water Retention Curve: Understanding Media Performance <\/h3>\n
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\nThis blend showed excellent water-holding capacity, maintaining optimal moisture levels without over-saturation. It provided consistent hydration for the shallow, fine roots of strawberries. <\/li>\n<\/h2>\n
\nThe higher coir content in this blend resulted in superior water retention, ensuring steady moisture availability. <\/li>\n<\/h2>\n
\nFeaturing higher air porosity, this mix allowed rapid drainage while retaining sufficient moisture, making it ideal for environments where overwatering is a risk. <\/li>\n<\/h2>\n
\nWhile coir held significant water at higher matric potentials, it risked over-saturation in wetter conditions, requiring more precise irrigation management. <\/li>\n<\/ul>\n
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