Layout Racks and Estimate Weekly Yield
1 dayCalculate plant sites per tier, project harvest weight per cycle from variety data, and plan staggered seeding for continuous harvest.
Advanced1-2 months
Lettuce Commercial Scale Guide
Complete guide for lettuce commercial scale — step-by-step workflow, tools, checklist, and expert tips to get started.
market growersurban farms
Workflow
Calculate Lighting and HVAC Power Cost
3 hoursSum fixture wattage × photoperiod × rate, add chiller and fan loads, estimate cost per head over crop cycle.
Scale NFT or DWC Channels and Nutrient Room
2–4 weeksSize stock tanks for weekly mixing, calculate air and pump redundancy, install monitoring for multi-zone EC and pH.
Plan Harvest, Pack, and Delivery Schedule
OngoingCalculate heads per delivery route, cold chain hold time, and seed-to-harvest timer for order fulfillment.
Tools Used
- Hydroponic Yield EstimatorPrimary
Projects weekly head count and biomass from rack layout and variety data.
- Hydroponic Power CostPrimary
Estimates electricity cost per head including lighting, pumps, and HVAC.
- Nutrient Stock Solution DilutionSupporting
Sizes bulk nutrient mixing for commercial weekly reservoir fills.
- Seed-to-Harvest TimerReference
Schedules seeding dates for continuous harvest against delivery orders.
Checklist
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Water Quality
Electrical
System
Monitoring
Maintenance
Equipment
Reference Materials
Lettuce Production BenchmarksTable
Lettuce Production Benchmarks
| Metric | Indoor NFT | Notes |
|---|---|---|
| Cycle days | 28–35 | Variety dependent |
| Heads/m²/cycle | 16–25 | Dense planting |
| kWh/head/cycle | 0.5–1.5 | LED region dependent |
| Labor min/head | 0.5–1.0 | Including pack |
Revenue per RackFormula
Weekly revenue ≈ heads harvested × price per head − power − nutrients − labor.
Food Safety LogStandard
Maintain batch records for nutrient mixes and harvest dates for buyer audits.
Stabilize pH First
Adjust pH before adding nutrients — pH drift after mixing wastes expensive inputs.
Root Zone Temp
Keep reservoir 65–70°F — warmer water holds less oxygen and invites root rot.
Electrical Safety
Drip loops on all cords entering reservoirs and GFCI on every outlet.
Safety Notes
- Keep electrical components away from water — use GFCI outlets for all pumps and lights.
- Monitor pH and nutrient levels daily — imbalances kill plants quickly.