{"id":2671,"date":"2015-03-29T15:47:26","date_gmt":"2015-03-29T08:47:26","guid":{"rendered":"https:\/\/ifs.edu.vn\/?p=2671"},"modified":"2025-04-01T10:11:43","modified_gmt":"2025-04-01T03:11:43","slug":"successful-implementation-of-outdoor-recirculating-hydroponic-lettuce-cultivation","status":"publish","type":"post","link":"https:\/\/ifs.edu.vn\/?p=2671&lang=en","title":{"rendered":"Successful Implementation of Outdoor Recirculating Hydroponic Lettuce Cultivation"},"content":{"rendered":"
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The nursery at the Dinh Hoa Experimental Research Station has successfully implemented and put into operation an outdoor recirculating hydroponic lettuce production system without using a greenhouse. This method produces disease-free, high-yield lettuce that is easy to grow and care for.<\/p>\n

Step 1: Preparing Equipment<\/strong><\/h3>\n
    \n
  • \n

    Plastic cups or net pots:<\/strong> Choose dark-colored or opaque cups\/pots to prevent light penetration, creating a dark environment that promotes root development and prevents algae growth.<\/p>\n<\/li>\n

  • \n

    Plastic trays, baskets, and seedling medium:<\/strong> Suitable mediums include coconut coir, thoroughly boiled straw, burned rice husks, and corn silk.<\/p>\n<\/li>\n<\/ul>\n

    Step 2: Preparing Seedlings<\/strong><\/h3>\n

    Sow 1-2 seeds per hydroponic pot. In the early stages, mix the hydroponic nutrient solution and spray it lightly to keep the coconut coir moist. Place the medium in a dry, well-ventilated area away from direct sunlight.<\/p>\n

    Once the seedlings reach 2-3 cm in height, move them outdoors for 3-5 days to acclimate before transplanting them onto the hydroponic system.<\/p>\n

    Step 3: Transferring Seedlings to the Hydroponic System<\/strong><\/h3>\n<\/div>\n
    \n\n\n\n
    \n

    After 3-5 days, select healthy seedlings with root lengths of 3-5 cm, free from signs of disease, wilting, root rot, or poor growth. Carefully transplant them onto the hydroponic system without damaging the roots or leaves.<\/p>\n

    \n<\/td>\n

    		\"\"<\/p>\n

    (A-frame hydroponic lettuce system at Dinh Hoa Nursery)<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Step 4: Adding Nutrients to the Recirculating Hydroponic System<\/strong><\/h3>\n

    The best nutrient solution for hydroponic lettuce is Hydro Greens<\/strong>. The preparation process is simple:<\/p>\n

      \n
    1. \n

      Mix 0.7 ml of solutions A and B into 10 liters of clean water (do not pour them directly together).<\/p>\n<\/li>\n

    2. \n

      Check the TDS (Total Dissolved Solids) level, ensuring it remains between 800-1000 ppm for optimal plant growth.<\/p>\n<\/li>\n<\/ol>\n

      \"\"<\/strong><\/p>\n

      Step 5: Watering and Caring for Seedlings<\/strong><\/h3>\n

      In a recirculating hydroponic system, water is automatically replenished through a circulation pump. Regularly monitor and add water as needed. Remove wilted leaves and discard any plants showing root rot to prevent fungal and bacterial infections from spreading.<\/p>\n

      Step 6: Harvesting<\/strong><\/h3>\n\n\n\n
      \"\"<\/td>\n\n

      Lettuce is ready for harvest after 3-4 weeks. To maintain freshness and avoid wilting, harvest in the morning before 9:00 AM or in the afternoon after 4:00 PM. Remove the entire plant from the system and cut at the base. Do not return partially harvested pots to the system, as this can contaminate the nutrient solution and spread diseases to other plants.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

       <\/p>\n

      Article and images by:<\/strong> Engineer Nong Thi Tham<\/em><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

      The nursery at the Dinh Hoa Experimental Research Station has successfully implemented and put into operation an outdoor recirculating hydroponic lettuce production system without using a greenhouse. This method produces disease-free, high-yield lettuce that is easy to grow and care for. Step 1: Preparing Equipment Plastic cups or net pots: Choose dark-colored or opaque cups\/pots […]<\/p>\n","protected":false},"author":5,"featured_media":2669,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[132],"tags":[],"class_list":["post-2671","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-planting-techniques"],"_links":{"self":[{"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/posts\/2671","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2671"}],"version-history":[{"count":2,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/posts\/2671\/revisions"}],"predecessor-version":[{"id":2717,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/posts\/2671\/revisions\/2717"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/media\/2669"}],"wp:attachment":[{"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}