General
Hydrangeas are deciduous shrubs loved for their large, showy flower heads that bloom from summer to autumn. They are versatile garden plants used in borders, foundation plantings, and containers. Different species vary greatly in size, hardiness, and pruning requirements. With the right placement and care, hydrangeas are long-lived and increasingly beautiful with age.
Light
Partial shade; morning sun with afternoon shade is ideal.
Soil type
Moist, humus-rich, well-drained soil.
Water requirement
High; requires consistently moist soil.
Nutrient requirement
Medium; benefits from gentle, regular feeding.
Precultivation
Hydrangeas are rarely grown from seed in gardens. They are typically propagated from cuttings or purchased as container-grown plants for reliable flowering.
Planting
Plant in spring or early autumn when soil moisture is reliable. Water thoroughly after planting and mulch to keep roots cool and moist. Avoid planting in hot, dry, or windy locations.
Pruning
Pruning depends on species. Hydrangea macrophylla flowers on old wood and should be pruned very lightly. Hydrangea arborescens and H. paniculata flower on new wood and can be cut back harder in spring.
Maintenance
Water regularly, especially during dry periods. Mulch annually with compost or leaf mold. Fertilize lightly in spring. Protect sensitive varieties from harsh winter conditions.
Harvest
Flowers can be cut for fresh or dried arrangements when fully developed.
Common issues
Wilting due to drought, winter damage to buds, poor flowering from incorrect pruning, chlorosis in high pH soils.
Pollination
Insect-pollinated; attracts bees and other pollinators.
Companion plants
Hosta, ferns, astilbe, woodland perennials.
Incompatible plants
Plants preferring very dry or nutrient-poor soils.
