Trials showing the potential for cutting water demand in soft fruit grown in containers using an innovative compost additive will be on show at the Fruit Focus event, at the East Malling Research Centre, Kent on July 23.

The trials conducted by exhibitor Certis will also compare the performance of the dry water management additive Celcote on blueberries and raspberries grown in containers. The trials have been taking place since 2007 with some encouraging results, said Certis’ Alan Horgan. Trials have shown increased growth and vigour of the plants following planting, which should ultimately deliver higher yields when these plants come into production. The trials compare Celcote treated pots in comparison to an untreated control group with both treated and untreated receiving equal levels of watering.

Horgan explained that the additive works by coating the fibres of the compost. “This improves the ability of the growing media to absorb and retain water, allowing it to be slowly made available to the plant when required,” he said. “Celcote also reduces the potential risk of root diseases such as phytophthora as the compost does not become waterlogged by either excessive irrigation or rainfall. In addition, nutrients are less likely to leach out of the container thus ensuring that they are available to the plant root system. This all results in stronger and healthier plants.”

Members of the Certis team will be on hand at Fruit Focus to talk about the benefits to growers.