40 ft Vegetable Container Farm Romaine Lettuce Programme
For Commercial Leafy Green Farm
Model HY-LG-40-09 | Document HY-PDS-LG-009 | Baseline: 40 ft ISO container, approx. 5 growing tiers
PRODUCT OVERVIEW
Romaine Lettuce roots are sensitive to temperature and dissolved oxygen. The container manages root zone and air separately, setting solution temperature, EC, pH and photoperiod independently to avoid the root rot and bolting common in hot seasons.
Roughly five growing tiers with per-layer dimmable LED recipes give Romaine Lettuce a stable daily light integral across the 28 - 33-day cycle.
The heaviest leafy variety per head and the highest yield per cycle, suited to volume wholesale and processing supply.
Commercial farms run the unit as a standard production module: plant weekly, harvest weekly, with 11 - 13 Romaine Lettuce cycles a year delivered to wholesale markets and processors.
CROP AND OUTPUT DATA
Variety | Romaine Lettuce (Leafy green) |
Growing cycle (transplant to harvest) | 28 - 33 days |
Unit weight | 180 - 250 g |
Plants per cycle | approx. 3,300 - 5,800 |
Yield per cycle | 650 - 950 kg |
Cycles per year | 11 - 13 |
Annual output (estimate) | 7,150 - 12,350 kg |
Propagation | Plug seedlings |
Crop difficulty | Easy |
Figures follow the 40 ft standard container baseline with about five growing tiers. Yield per cycle and annual output are estimates; actual results vary with tier count, light recipe, CO2 level and crop management.
KEY ADVANTAGES
· No soil in the room means clean leaves and less post-harvest washing.
· The unit can be shared with other leafy varieties on a weekly rotation for a more flexible product mix.
· Rated Easy in difficulty and run from process cards, the crop is workable by general staff.
· Per-tier LED recipes give more uniform leaf colour, plant shape and head weight.
· Rotation and zoning reduce disease pressure and chemical inputs.
· At 15 - 30 kg of fresh greens a day, one unit matches a mid-sized restaurant or community scheme.
· Batch records of temperature, EC, pH and light trace each harvest back to a specific tier.
· About five tiers lift output per square metre to roughly five times open-field levels.
CONTAINER CONFIGURATION
Footprint | 12.19 x 2.44 x 2.90 m (40 ft ISO container) |
Growing system | Approx. 5 tiers, hydroponic or aeroponic |
Scale per cycle | 3,300 - 5,800 plants |
Temperature | 18 - 24 °C, set per variety |
Relative humidity | 60 - 75% |
CO2 concentration | 800 - 1,200 ppm |
Lighting | LED recipe, dimmable per tier |
Nutrient solution | Closed loop with automatic EC and pH control |
Energy reference | 0.8 - 1.2 kWh per kg of fresh greens; electricity about 60 - 70% of operating cost |
Control and monitoring | PLC, touchscreen HMI, remote monitoring and alarms |
Delivery | Pre-commissioned at the factory, set and connected on site |
CLIMATE AND CONTROL
CO2 control interlocks with ventilation: enrichment during the light period lifts photosynthesis, while night ventilation controls humidity and prevents leaf-surface condensation.
The controller stores recipes by variety - temperature, humidity, photoperiod, irrigation frequency and nutrient targets - called up as a set. Changing crops loads a new recipe while batch history is retained.
CULTIVATION AND SCHEDULING
After harvest the room is cleaned and sanitised and the return line flushed, with downtime held under a day so the 11 - 13-cycle annual plan is not eroded.
The standard schedule assumes a 40 ft unit with about five tiers: plant one batch and harvest one batch each week, giving 11 - 13 Romaine Lettuce cycles a year. Adjust to order structure and harvest labour.
DELIVERY, TRAINING AND SERVICE
The unit transports and relocates as a standard container, so a lease expiry or site change does not strand the capital.
Crop changes and expansion include recipe support, covering cycle validation and density recommendations for new varieties.
FREQUENTLY ASKED QUESTIONS
How many units can one operator manage?
Under a standard schedule, one operator can cover daily rounds, nutrient top-up and harvest coordination for two to three units, with extra hands at harvest peaks.
Can several varieties run in one unit?
Yes. Allocate varieties by tier or zone with separate recipes, keeping neighbours' temperature and nutrient needs similar so neither is compromised.
Does the unit overheat in summer?
Insulation with cooling and dehumidification holds the set point; in extreme heat, specify extra cooling capacity and monitor root-zone solution temperature.
Where do the seedlings come from?
Either plug seedlings or direct seeding. Plugs arrive with intact roots and no transplant shock; direct seeding skips the nursery at lower cost but occupies the bed longer. Seedlings are about 5 - 12% of operating cost.
CONTACT AND DATA NOTES
Hangzhou Hengyu Intelligent Technology Co., Ltd. designs, builds and delivers complete container farms. Share your site conditions, target varieties and daily volume, and we will return a layout, a crop schedule and an energy estimate. Figures in this document use the 40 ft standard container (about five growing tiers) as the baseline and are estimates; output varies with tier count, light recipe, CO2 level and crop management, and is not a performance guarantee.
HENGYU | Hangzhou, Zhejiang, China | www.henvic.net | Model HY-LG-40-09 | Doc HY-PDS-LG-009
