Robinson worked as a horticultural adviser for the Ministry of Agriculture (1950–53), in
County Down. In 1953 he was appointed deputy director at the newly established Horticulture Research Centre in
Loughgall,
County Armagh. His first major job was to help clean up the weed problem in fruit crops. His research into the many chemical tools that were becoming available at the time established him as an expert in this field. However, he had at the time no training in research methods or statistical analysis and felt that he was in a job for which he was inadequately trained, but he acted to change this. As Robinson later wrote, "I knew early in 1954 that the well endowed
W.K. Kellogg Foundation was giving grants to people in Britain to provide further training in the USA for agricultural graduates. I happened to be in London in March 1954 and by pure chance I passed by the headquarters of the Foundation. I still don't know what gave me the courage but I walked in, asked to see the Director (without an appointment) and told him I wanted a Kellogg Foundation Grant to study at
Cornell University in New York State for a year. At the time I worked for the Ministry of Agriculture in Northern Ireland, a most bureaucratic organisation, and when I returned all hell was let loose for the Ministry felt (understandably) that they and they alone should decide who would benefit from Kellogg grants. Anyway I was released for a year and spent 1954/55 in the States where I learned a great deal about research and plants. The US had not suffered from the
War the way Europe had and it was an exhilarating time." Having been introduced to his future wife by a friend in 1953, they married in 1955. It benefits from a sheltered location with a warm microclimate, and plants growing there include bananas, tree ferns, South African Erica and a range of palms, all flourishing outside without any winter protection. At times it was available for garden tours by groups. He wrote on gardening topics for a number of Irish and UK newspapers, journals and magazines, including Ireland's most-read
agricultural newspaper, the
Farmers Journal, and the top-selling gardening magazine,
The Irish Garden. ==Publications and editorial work==