The hydrangeas are robust and vigorous deciduous shrubs, which find their place in the shady places of our garden. It is an acidophilic plant, which therefore needs a specific soil to develop at its best; this soil, together with the use of rainwater for watering prevents the onset of ferric chlorosis, a disease that manifests itself with the rapid yellowing of the foliage. Plants affected by ferric chlorosis must be treated using special greening fertilizers, which enrich the soil with minerals, such as iron, which can be easily assimilated by the plant. The hydrangeas, from April to the autumn, need good watering, and a fresh soil: during the summer months we will have to intervene even daily. The rapid collapse of the foliage in the event of drought warns us when the plant needs water. In the case of potted specimens, placement of a saucer allows us, during the warm months, to water our hydrangeas every 2-3 days, letting the plants absorb the water they need from the saucer. During the winter the hydrangeas dry the leaves and generally do not require special care.