Cold atmospheric plasmas (CAPs) have been shown to have disinfectant properties in human and animal health systems, providing surface and sub-surface activity while leaving healthy tissue undamaged. Very recently, CAPs have been shown to reduce certain plant diseases, and to modify seed and seedling behaviour, altering seed coat properties and water uptake, resulting in improved seedling vigour and, in some cases, improved crop yield. Many horticultural crops are adversely affected by seed-borne diseases which are difficult to control with standard fungicidal products. In broad-acre arable crops, while seed-borne diseases can usually be effectively controlled, there are many establishment problems, primarily associated with lack of moisture, which result in either crop loss, or more usually sub-optimal plant populations, poor growth and lower final yields. This feasibility study will focus on understanding how CAPs could be used to condition seed and overcome some of these problems. Contrasting seed types and problems will be addressed, to include a) control of seed-borne disease in small seeded vegetables (celery, onion, lettuce) b) promotion of germination and vigour in large seeded (maize) and small seeded (oilseed rape) field crops, and evaluation of crop performance. The feasibility study will inform the potential for a novel, easy to use, non-chemical technique for improving crop performance, and create a commercial opportunity for the development of safe and effective plasma generating units.