Belgium’s potato sector is contending with an unusually large inventory of tubers as the 2025 crop enters storage, raising questions about market balance and supply chain pressures into the new year.

As of 15 November 2025, total potato stocks are estimated at 4.11 million tonnes, exceeding the average of the last three years. This figure is roughly 800,000 tonnes higher than the equivalent storage level last year, underscoring a significant build-up of supply in the ware potato market.

The stock increase reflects an exceptionally strong harvest. Belgian gross production in 2025 is estimated at 5.29 million tonnes, up around 24% compared with 2024, marking the highest level recorded since 2017. The increase was driven by a larger planted area combined with favourable yields, according to the survey data.

Within the total crop, storage varieties account for the majority of production. Fontane represents 58% of Belgian storage potato volumes, reinforcing its dominant position in the country’s processing-oriented supply base. Other key varieties, including Innovator and Challenger, each account for approximately 300,000 tonnes, shaping the mix available to processors and traders during the storage season.

Contracting levels for storage potatoes have also increased markedly. The survey indicates that 74% of storage potato volumes are under contract, the highest proportion recorded since 2020. Contracted shares have risen across the main varieties compared with the previous season, reflecting a continued shift toward risk-sharing arrangements between growers and buyers.

The elevated stock levels form part of a broader North-West European context characterised by ample harvests and strong production growth. While detailed pricing data varies by outlet and contract type, market signals in recent weeks have pointed to increased pressure on free-buy volumes as supply outpaces immediate demand.

For processors, the large crop and high contracting rate provide short-term supply security. For growers, however, the accumulation of stocks — particularly outside contract — raises concerns over market absorption and price formation as the season progresses.

How effectively Belgium’s potato sector balances the sizeable 2025 crop against processing demand, exports and domestic consumption will become clearer over the coming months, as delivery schedules accelerate and storage dynamics evolve.