Mallorca's Soil: Calcareous Ground and Call Vermell Clay
Designing in the Balearics means negotiating with the geology itself. Much of the island sits on predominantly calcareous, high-pH soil — alkaline ground that can lock away essential nutrients like iron in non-native species, causing chlorosis (yellowing leaves) if the wrong plants are chosen.
Many estates across the central and southern plains, including around Campos, sit on Call Vermell, the island's characteristic iron-rich red clay. Visually striking but prone to compacting hard during dry spells, it can become impenetrable to roots if left untreated. Rather than replacing it, S'Estepa regenerates it — incorporating organic matter and permeable aggregates to aerate the clay and turn it into a moisture-retaining base that supports deep root systems. At our Crestatx project, this soil-first approach replaced the lawn entirely with a mineral layer over regenerated ground, cutting irrigation demand while increasing biodiversity across the garden.
