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Hydroponic Substrates

Hydroponic Substrates Allows for a wider margin of error for the plants Hold nutrients and water incase of pump failure Provides physical structure for roots In part insulates the plant roots from large swings in temperature Coco Coir Can hold on to calcium and make it unavailable to the plants (Cal-Mag recommended) Needs to be rinsed to remove unwanted salts Can be a variable product from batch to batch Holds moisture very well Expanded Pebbles Reusable Always rinse them before use to avoid clogging pumps with the find powder/residue Take time to get them properly saturated when first using High CEC Can basically not be over irrigated, as many run an irrigation system 24 hours a day Should be at least 4” deep to prevent light penetration which can negatively impact root growth Rock Wool Commercial grower favorite You need to presoak the cubes (5-15min depending on size), and shake the cubes before inserting into the tray (do not squeeze) Very easy/quick transplanting Great for holding air and water Sand Provides good plant support Should be sterilized Is very heavy Does not hold water well Makes the transplant process difficult Helpful “Review Sheets” to use while you watch the video can be found at… https://drive.google.com/open?id=1c5f... “Review Sheets with Answers” so you can check your understanding can be found at… https://drive.google.com/open?id=1kQl... Link to Lecture Slides: https://drive.google.com/open?id=16u-... *Full work cited for "Hydroponic Substrates" can be viewed at... https://drive.google.com/open?id=15lz...