Horticulture is the science of plants and so goes beyond gardening. It is more intensely involved in breeding new plants, planning gardens and conserving species. It is possible for a horticulturalist to work as a gardener but they may also work as a grower, designer, technical advisor. They could work with soil, weeds, crops, flowers or trees to name but a few. They could be involved in plant nurseries, botanical gardens or even work in laboratories on the science side of things.