Planting with species that thrive on less than 500mm of winter rainfall a year is the new reality for landscaping in Cape Town.
The politicians may have done away with the Day Zero concept, but the realities of the water situation in the Western Cape remains dire.
Water restrictions and the price of potable water have encouraged a new landscaping reality. The foundation of this reality is based on landscaping with plants that thrive with less than 500mm of winter rainfall. And in our current era of climate change, coping with dramatically wet years – followed by dramatically dry years.
Highs and lows
With an average rainfall of 464mm per annum, South Africa remains a water scarce country. In years gone by, Cape Town’s average rainfall was 820mm per annum. In 2013 and 2014, Cape Town’s annual rainfall exceeded this average with two dramatically wet years.
The winds of change arrived in 2015. Over the past three years, the rainfall received in Cape Town has swung way below the average: 549mm in 2015, 634mm in 2016 and 499mm in 2017 – the driest year since observations began in 1921.
Against this backdrop, landscapers are practising the art of resilient landscaping. “We need green spaces in our cities”, says Norah de Wet, Chairperson of the South African Landscapers’ Institute (SALI). “Professional landscapers are at the forefront of securing the intrinsic value of properties across the Western Cape by refitting, rehabilitating, restoring and installing resilient landscapes”.
Planting for resilience
“Choosing plants that can thrive in a winter rainfall area with less that 500mm a year of rainfall is key to the concept of resilient landscaping in the Western Cape”, says Deon van Eeden from Vula Environmental Services. “Only with a sound knowledge of fynbos flora, can one succeed in designing water wise, ecologically sound, resilient landscapes for the winter rainfall area”, he adds.