Field performance of grafted, micropropagated, and own-rooted plants of three Italian hazelnut cultivars during the initial four seasons of development.

Introduction: Over the course of four consecutive years, a comparative study, for the first time, was carried out to assess their growth characteristics, vegetative and productive performances.

Material: Micropropagated, grafted on not suckering rootstock and own-rooted plants by layering from three Italian hazelnut ( L.) cultivars were established in the same orchard and environmental condition.