The invention provides a method of growing a flower crop comprising: positioning a plant in the form of a cutting of the crop in a first coherent mineral wool growth substrate having a volume not more than 150 cm 3 , allowing the plant to root and grow for at least 12 days, transferring the plant within the first coherent mineral wool growth substrate so that the first coherent mineral wool growth substrate is in contact with a second coherent mineral wool growth substrate having width at least 5 cm and height at least 5 cm, and allowing the plant to grow for at least a further 4 weeks before any harvesting of flower crop takes place.
