Some advice from the latest Enviropaedia newsletter:
- Always water your plants during the early morning hours or in the evening. Between 10:00 and 15:00 you can lose up to 90% of water to evaporation.
- Focus on indigenous and non–invasive alien plants with low water demands.
- Roof water can also be profitably stored in tanks for watering gardens.
- Use “grey water” from baths, washing mashines and other safe sources to water your garden.

to be sure! plus if you water grass and other plants while it’s sunny the water drops on the leaves are magnified by the sun’s rays and can burn your grass. huh.
I must say, now that my garden is established, I hardly ever water it.