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This research review identifies and analyzes the potential of Romaine lettuce (Lactuca sativa var. longifolia) cultivation using the Nutrient Film Technique (NFT) in greenhouse environments as a high-value horticultural commodity. Horticulture is a strategic sector in Indonesia for improving farmer welfare and meeting the growing demand for healthy food. Conventional farming faces challenges such as land conversion, climate instability, and high pesticide residues. This study examines how the NFT hydroponic system serves as an innovative solution by providing controlled environments that enhance growth and quality. Findings indicate that Romaine lettuce grown via NFT achieves higher productivity and faster harvest cycles, with a feasibility study showing an R/C ratio of 2.40, indicating high profitability. Furthermore, the integration of controlled environment agriculture supports urban farming initiatives and mitigates risks from climate change and pests. This review concludes that adopting NFT technology is essential for developing a sustainable, efficient, and high-quality agricultural system in Indonesia, particularly in urban areas with limited space.

Environmental character education from an early age is a strategic step in developing a generation that cares about the natural world. Instilling this value is crucial in concrete ways so that children can understand and directly experience the benefits of protecting the environment. One effort undertaken is through a simple hydroponic learning activity involving children from TKS Kartika V 16. The activity was held once at the Samarinda State Agricultural Polytechnic with the support of lecturers as resource persons. Through a hands-on learning method, the children were introduced to how to grow lettuce and bok choy using a simple hydroponic system. The learning process included an introduction to tools and materials, an explanation of the planting stages, and plant care. Observations throughout the activity showed high enthusiasm among the children. They were actively involved, from preparing the planting medium, planting the seeds, to providing air and nutrients to the plants. This activity fostered a sense of care and responsibility for the plants they grew themselves. Furthermore, the children's fine motor skills were also demonstrated through activities such as arranging the planting medium, sowing the seeds, and assembling the hydroponic equipment. This activity not only developed individual skills but also taught social values such as cooperation and mutual assistance. Children learn to work in groups, help each other, and appreciate each other's roles in the planting process. This hands-on, hands-on approach has proven effective in strengthening environmental awareness in a fun and contextual way. Therefore, environmental education through hydroponics can be a practical, inspiring, and easy-to-implement learning medium for young children, while also serving as a concrete example of how character education can go hand-in-hand with the introduction of environmentally friendly technologies.

This study aims to analyze the 4P marketing mix (Product, Price, Place, Promotion) in hydroponic lettuce marketing at SMA Negeri 1 Karangnunggal. The method used is descriptive qualitative with case studies through observation and interviews. The results of the study indicate that the 4P marketing mix emphasizes products that have good quality such as good lettuce color and shape, the use of good seeds to produce good products. The price of the product has an affordable price which is relatively cheap for premium quality and offers discounts for large purchases. In easily accessible marketing places such as buyers can visit the place of sale directly or orders can be delivered to buyers directly. As well as the promotion methods carried out offline and online through social media.

Hydroponics as an urban farming model is very meaningful to the community, including the Inkiya Farm business in Bajubodoa village, Maros district. There are several obstacles in the production of lettuce vegetables in hydroponics that are run so that they experience fluctuations, by natural disturbances causing plant damage and even crop failure (wilting or dying), limited space, drought resistance and less than optimal growth which is generally experienced because 100% using the NFT system. The implementation of Bell-Siphon on Ebb Flow system hydroponic technology is an alternative solution that is cheaper, environmentally friendly, space saving and more optimal plant production. The Bell-Siphon unit driving the tidal system is simply assembled, placed in a hydroponic container.  This science and technology application activity results in additional knowledge for partners on how to build or assemble a Tidal System with Bell Siphon to increase the amount of production, reduce the risk of crop failure, and the potential for better production of lettuce plants. The activity resulted in at least 6 units of Ebb-Flow hydroponics in containers (tubs) with various media, installation and training for women members of the partners. Sustainability of implementation is expected at Partners as well as at the household scale in each member who has received training.

The Urban Farming Group "Keputih Bersemi," based on educational hydroponics, is an active farming group in Kelurahan Keputih, Surabaya. Urban farming is an ideal choice for urban residents to engage in productive activities that can be followed by the surrounding community and, of course, produce something of added value. The plants or vegetables grown by the Keputih Bersemi farming group include pak choi, lettuce, and others. The harvested produce has not been sold or distributed optimally because marketing activities are conducted conventionally, with members offering the products directly to the surrounding community. This situation arises because the majority of the farming group members are elderly and still unfamiliar with technology. The use of social media, such as Instagram and Whatsapp, plays an important role as it significantly increases the visibility and sales of the group's agricultural products. A marketing strategy that involves engaging content, the use of relevant hashtags, and active interaction with potential customers will expand market reach and attract more potential customers.

This research explains the feasibility level of hydroponic lettuce farming in Kelorarum Village, Tikung District, Lamongan Regency. This business is engaged in the production of hydroponic lettuce. This research used a descriptive analysis method which used 6 informants from hydroponic lettuce farming owners as research subjects. Data collected through interviews aims to analyze fixed costs, total costs, variable costs, demand and profits.The feasibility of the business carried out is by using R/C Ratio (Revenue Cost Ratio), B/C Ratio (Benefit Cost Ratio), BEP (Break Even Point) calculations in order to find out whether the business is feasible or not. The results of this research can provide education for business actors regarding the continuation of hydroponic lettuce farming in Kelorarum Village, Tikung District, Lamongan Regency.

The growth of the urban population has led to a shortage of agricultural land. This has led to an increase in urban agriculture, including hydroponics. The purpose of this research is to find out the partnership mechanism between hydroponic family farm and PT Puspa Agro Farm Sukabumi. This research uses descriptive analysis method found that the partnership between hydroponic family farm and PT Puspa Agro Farm is plasma core pattern. This pattern describes the assistance to hydroponic family farms from PT Puspa Agro farm. This is done to produce high quality plants and meet the criteria.  The types of plants are pakcoy mustard, pagoda mustard, curly lettuce, and romaine lettuce for each plant. Family farms establish partnership relationships through the Inti-plasma mechanism. The partner company guides the production process of partner farmers so that they can provide quality vegetables in accordance with the SOPs that are applied. The partnership pattern between Family Farm and PT Puspa Agro is a core-plasma mechanism. The plants produced are pakcoy mustard, pagoda mustard, curly lettuce and roamine lettuce. The benefits of the nucleus-plasma partnership pattern are that it can improve in economic and technical terms. Family Farm plants are of high quality and can meet consumer criteria.

The efforts of the Loru village government in order to improve food security and support the improvement of the family economy are by facilitating training for farmers. Loru village collaborated with PT. Nina Agro Jaya conducts Hydroponic Farming training for lettuce plants. The result of this training farmers will be faced with the marketing process. With all kinds of problems that will be faced in the marketing process. Another form of this activity is to describe the hydroponic lettuce marketing channel and to analyze the size of the margin and the efficiency level of hydroponic lettuce marketing. So that later lettuce farmers will have a better understanding of market conditions and be able to independently take certain actions in the marketing process. This activity was carried out in Loru Village, Sigi Biromaru District, Sigi Regency.