The manual ‘Nutrient Solutions for Greenhouse Crops’ describes nutrient solutions for the most important species of fruiting and leafy vegetables, soft fruits, cut flowers and potted plants cultivated in protected horticulture, such as greenhouses and urban farm systems. Different recommendations are presented for these crops grown in soil, as potted plants or in hydroponic growing systems using either an inert growing medium (e.g. rock wool or pumice) or an organic growing medium (e.g. peat or coco peat).