The present invention relates to a process to improve the yield of strawberry crops, the process comprising the step of applying a polyene antifungal agent, especially natamycin, to the roots of a strawberry plant prior to planting said plant and/or to the medium to which the plant is to be planted. The claimed process results in an increased number of crop, an increase in the weight of individual crop, and an increase in the total weight of the crop, and may allow for an earlier harvest.
