How to prepare the vegetable storehouse for the potato storage season?

Successful storage doesn’t begin at the warehouse door - it begins in the field. From nitrogen balance and irrigation to facility sanitation and early disease detection, here’s what growers must do before, during, and after harvest to protect potato quality all season long.

Successful Potato Storage Starts in the Field: A Practical Guide

Long-term potato storage begins long before the crop reaches the warehouse. Proper irrigation, balanced nitrogen, and timely disease management can dramatically improve storability. Stress during the growing season often leads to higher sugar content, lower specific gravity, and reduced storage life — problems that no ventilation system can fix later.

Field Preparation: Laying the Foundation

Monitoring disease and insect pressure during the season, combined with targeted pesticide applications, helps minimize surprises at harvest. By the time the crop reaches maturity, a grower should already have a clear picture of which lots are fit for storage and which may require special handling.

Step 1: Preparing the Storage Facility

The first task is a complete cleanout. Remove plants, debris, and any unnecessary materials. Inspect the structure: loose insulation, cracked metal, damaged wood, unsealed seams — everything must be repaired before loading begins.

A deep cleaning helps prevent pathogens from persisting between seasons. Wash all surfaces - floors, beams, ducts, pipes, ventilation and humidification components - using detergent and hot water or steam. Rinse thoroughly, then apply disinfectant and allow 10–15 minutes of contact time. Seal the facility for two weeks, then air it out completely.

If silver scurf has been a recurring issue, this step becomes critical. Research shows silver scurf can survive up to 9 months on Styrofoam and soil floors, and up to 3 months on metal. Ensure the disinfectant is compatible with your construction materials.

Storage Facility Checklist

Structural & Sanitation

Repair all insulation to prevent condensation.
Clean and clear all air duct openings.
Remove adhesive tape, loose insulation, wood fragments, and other foreign materials.
Replace worn humidification equipment and high-pressure nozzles.
Inspect for corrosion and structural wear.

Ventilation & Airflow

Service and balance all ventilation fans.
Adjust ducts to achieve uniform airflow across the mound.
Repair or replace worn inlet components.
Seal all duct seams to improve system performance.

Sensors & Controls

Calibrate all climate sensors - temperature, humidity, CO₂, pressure.
Inspect and maintain humidity nozzles, remove mineral deposits, clear blockages.
Test the control system before loading the crop.

Pre-Season Conditioning

Run the storage room empty to stabilise temperature and humidity.
Understand the condition of the incoming batch - maturity, damage, disease pressure - and adjust management accordingly.

Harvesting & Handling: Protecting Tuber Integrity

Harvesting must be carried out to ensure that at least 75% of tubers remain intact. A cooler pulp temperature (no higher than 7°C) is ideal. If temperatures are too high, postpone harvesting if possible.

Additional guidelines:

Limit mound height to 4–5 m, depending on the variety, to avoid pressure bruising.
Turn on ventilation and humidification as soon as the first ducts are covered.
Remove soil clods and debris to improve airflow.
Load each storage unit with potatoes intended for the same end use.
Close the facility immediately after filling to achieve uniform temperature quickly.

Curing & Temperature Management

Maintain 7–8°C pulp temperature for 2–3 weeks to allow proper wound healing. Keep relative humidity at 95% during this phase.

After curing:

Reduce temperature gradually, by 2–3°C per week, until the recommended storage temperature is reached.
Monitor the facility daily — airflow, temperature uniformity, CO₂ levels, condensation, sprouting.
Use appropriate sprout inhibitors for each variety and storage duration.

During unloading:

Maintain airflow to protect the remaining tubers.
Adjust ventilation so air reaches all sections of the reduced mound.

Final Reminder

Your storage facility is not a hospital - it cannot heal diseased tubers. Only healthy, well-grown, carefully harvested potatoes will store well. Proper pre-season preparation and precise storage management protect quality and minimise losses.