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Wild Frontiers

7 tips for creating a water-wise garden

Written by: Catherine Browne

Water is a scarce and dwindling resource, and South Africa is a dry country with unpredictable rainfall and an ever increasing demand for it. As the demand for this precious resource grows, so will its price along with legislation discouraging excessive use. It is, therefore, important to garden for the future.

Water-wise gardens cut down water usage but are still beautiful and, as there are so many indigenous options to choose from, water-wise gardening should be the norm.

The succulent sour fig (Carpobrotus deliciosus) © Alice Notten

The succulent sour fig (Carpobrotus deliciosus) ©Alice Notten

Get water-wise with these seven easy steps from the Botanical Society of South Africa and SANBI:

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1. Choose locally suitable water-wise plants

There are numerous beautiful plants that require minimal to no watering once established. Remember to plant in autumn, after the first rains – this gives plants a full winter to develop a strong root system before facing the dry season.

The plumbago (Plumbago auriculatastrong) has a deep, strong root system © Alice Notten

The plumbago (Plumbago auriculatastrong) has a deep, strong root system ©Alice Notten

2. Group plants according to their water needs

Water-wise plants need minimal watering once established. And by grouping your plants according to their water needs, you avoid wasting water on plants that don’t need it. Those plants that need more watering should be planted together in a small area where their water needs can be attended to.

The succulent kerky bush (Crassula ovata) requires little water © Alice Notten

The succulent kerky bush (Crassula ovata) requires little water ©Alice Notten

3. Reconsider your lawn

Lawns are thirsty so think about the lawn space you use and need. Buffalo grass requires less water and less mowing. Just don’t cut the grass too short as longer leaves shade the roots and reduce water evaporation.

Consider using a ground-cover instead of a lawn like this trailing gazania (Gazania rigens) © Alice Notten

Consider using a ground-cover instead of a lawn like this trailing gazania (Gazania rigens) ©Alice Notten

4. Prepare the soil well and add compost

Dig in plenty of compost as it aids the water retention ability of the soil, adds nutrients, and also encourages earthworm activity, which improves aeration and drainage. Remember to compost your beds at least once a year.

Cape honeysuckle (Tecomaria capensis yellow) is highly adaptable and grows well in a variety of soils © Alice Notten

Cape honeysuckle (Tecomaria capensis yellow) is highly adaptable and grows well in a variety of soils ©Alice Notten

5. Use lots of mulch between plants

Mulch helps to keep the soil cool and reduces evaporation. It also reduces run-off and erosion, suppresses weed growth, enriches the soil and prevents compacting of the soil. Mulch is available in a variety of options including bark, compost and dried leaves.

The different types of mulch © Alice Notten

The different types of mulch ©Alice Notten

6. Water correctly and only when necessary

Most people overwater. Save water by watering thoroughly but less often and when evaporation is lowest (early morning and evening). A drip or underground irrigation also saves water and reduces weed growth.

The wind and drought tolerant coastal camphor bush (Tarchonanthus littoralis) © Alice Notten

The wind and drought tolerant coastal camphor bush (Tarchonanthus littoralis) ©Alice Notten

7. Create shade and windbreaks

Wind and sun can dry out plants. Plant fast-growing, wind-resistant, water-wise trees and shrubs suited to your area to provide shade and shelter.

The wind-resistant and fast-growing Keurboom (Virgilia divaricata) © Alice Notten

The wind-resistant and fast-growing Keurboom (Virgilia divaricata) ©Alice Notten

The Botanical Society promotes indigenous gardening and wise use of our country’s unique flora and precious resources. It also strives to create awareness and educate about floral conservation, and instil our shared passion for nature and biodiversity with others.

The beautiful, and indigenous, Breadasdorp sugarbush (Protea obtusifolia) © Alice Notten

The beautiful, and indigenous, Breadasdorp sugarbush (Protea obtusifolia) ©Alice Notten

These water-wise principles are on display in the water-wise demonstration gardens at Kirstenbosch, the Walter Sisulu and Free State National Botanical Gardens. Many of SANBI’s national botanical gardens also sell water-wise plants.

The water-wise garden at the Kirstenbosch Botanical Gardens © Alice Notten

The water-wise garden at the Kirstenbosch Botanical Gardens ©Alice Notten

Happy water-wise gardening. Here are a few other ideas for you:

– Find out more about indigenous plants here and water-wise gardening here. Also search drought resistant plants and plants suitable for certain climatic zones.

Get your MyPlanet card and make the Botanical Society of South Africa your beneficiary. This way you can support biodiversity awareness, conservation and education easily.

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