Arabfields, Said Ali, Analyst & Specialist in Agricultural Policy and Economic Innovations — Tomato growers could eventually have another tool to deal with one of the crop’s most persistent weaknesses, cold weather. Research into the genetic mechanisms that control how tomatoes respond to low temperatures is opening the door to plants that can continue growing when conditions become too cool for conventional varieties.

Tomatoes are naturally sensitive to cold, with low temperatures capable of slowing growth, disrupting flowering and reducing fruit development. That vulnerability can be costly for growers who plant early in the season or operate in regions where temperatures can fall sharply at night.

In 2026, researchers have identified several genetic pathways linked to cold tolerance in tomatoes. One recent study found that the SlMYB48 gene responds rapidly to cold stress and plays an important role in helping plants cope with low temperatures. When the gene was silenced, plants became significantly more sensitive to cold, suggesting that it could become a target for future breeding programmes.

Other research has reached a similar conclusion through different genetic pathways. Scientists studying the SlBTF3 gene found that increasing its activity helped tomatoes maintain chloroplast function during cold stress. Work on the SlGATA22 gene has also shown that modifying its activity can improve cold resistance in tomato seedlings.

For growers, the science could eventually have a practical impact. A farmer who currently waits for warmer conditions before transplanting seedlings could one day use a variety capable of establishing itself earlier. That could extend the growing season and reduce the risks associated with sudden temperature drops.

The potential benefits go beyond open-field farming. Greenhouse operators spend significant amounts of money maintaining suitable temperatures, particularly during colder periods. Tomatoes with greater natural tolerance could require less heating, potentially lowering energy costs and reducing the environmental footprint of production.

The timing is important as growers face increasingly unpredictable weather. Temperature extremes are becoming a greater concern for horticulture, and researchers are looking at genetic improvement as one way of making crops more resilient. Rather than simply trying to protect plants from stressful conditions, scientists are seeking varieties that can tolerate those conditions from the beginning.

Still, the research remains at an experimental stage. Genetic changes that improve cold tolerance must be tested carefully to ensure that they do not negatively affect yield, fruit quality, taste or other important characteristics. A plant that survives a cold spell but produces fewer marketable tomatoes would offer limited value to commercial growers.

The next few years are likely to bring more progress. With several genes now identified as potential targets, breeding programmes could combine cold tolerance with resistance to drought, disease and other stresses. Advances in CRISPR and other gene-editing technologies are also making it possible to investigate these traits more precisely.

If current research continues to translate into successful field trials, cold-tolerant tomatoes could begin moving from laboratories into commercial breeding programmes later this decade. The first impact may be modest, with varieties designed for early planting or cooler production regions, before wider adoption becomes possible.

For growers, the appeal is simple. A tomato plant that can keep growing through a chilly night could mean fewer lost flowers, a longer production window and more reliable harvests. What now looks like a genetic experiment could eventually become a practical way of giving one of the world’s most widely grown vegetables a little more room to withstand the weather.