Garden hedges in Spain: living boundaries for heat and drought

Much of the residential Costa Blanca is walled. A living boundary can soften hard surfaces, provide privacy and wind shelter and give birds and insects food and cover. It also needs more space and maintenance than a wall, plus reliable water while it establishes. The right choice depends on the width available, the soil and how much irrigation the mature hedge can honestly receive.

Drought-tolerant evergreen screens

For a solid year-round screen that copes with heat and modest summer water once settled, useful choices include Pittosporum tobira, common myrtle Myrtus communis, Mediterranean buckthorn Rhamnus alaternus, laurustinus Viburnum tinus and shrubby germander Teucrium fruticans. Check the mature width before planting. Myrtle and buckthorn are native to the region and can support local wildlife.

Flowering informal hedges

Where a looser, colourful boundary suits better, oleander Nerium oleander is the classic Spanish roadside hedge, tough and long flowering, but every part is poisonous. Prevent access by children and animals, do not burn the clippings and use the local green-waste route. Plumbago auriculata gives months of sky-blue flower on a warm wall. Hibiscus and pomegranate both make informal flowering screens. Avoid Lantana camara near open ground: Spain's environment ministry records it as an invasive alien plant and it can seed away from frost-free gardens.

Low hedges and edging

For structure and low divisions, rosemary, lavender, Westringia fruticosa, dwarf myrtle and Teucrium all take clipping into low informal hedges and need little water once established in suitable soil.

Choices to think twice about

Fast conifer hedges such as Leyland cypress can brown in drought and reflected heat. Common privet Ligustrum stays green only with regular water in many exposed gardens. A hedge of one species is vulnerable to a single pest or disease, so a mixed boundary of compatible shrubs can be more resilient.

Planting and care

Plant in autumn so roots establish over the cool months. Set young plants at spacing based on their mature spread, water in well and run a drip line along the row during establishment. Reduce irrigation only when the species and site allow it. Before trimming, check carefully for active nests and postpone work around occupied growth. Cut the hedge with the base slightly wider than the top so light reaches the whole face.

Sources and review

This guide was reviewed in September 2026 using Kew Plants of the World Online records for the genera named, the Royal Horticultural Society hedging guidance, the Spanish environment ministry's Lantana camara assessment and toxicology literature on Nerium oleander.