Water wisely

 Watering of gardens takes a lot of water, which is often not sustainable. There is a lot that we can do to make a difference.

Use Gray water
Rather than using municipal water (which is usually purified drinking water!), reuse water as much as possible. It is easy to keep a bucket in the shower and to reuse that water on plants (rather not use on your green vegetables).

Take out alien plants and shift to indigenous plants or succulents
Alien plants are usually very heavy on water, local indigenous plants are much more water wise, and they will flourish in your eco-system.

Reduce your grass!
Grass is very water intensive, so one of the best things that you can do is to reduce your lawn area. This will immediately reduce the amount of water that you need to use

Give your plants the right amount of water.
Some prefer consistent moisture; others are drought-tolerant. (Tip: Grouping plants with similar drinking habits together in a garden makes for more efficient watering.) And, when it comes time to water, there’s a proper way to do it: not too long (or you could create a boggy situation where fungus and rot can happen) and not too quickly (or you could encourage shallow roots that are vulnerable to drought conditions). Ideally, you should water deeply and at longer intervals in between so that the water reaches the longer roots.

Make watering part of your morning routine.
Be choosy about your watering schedule and give your plants a long drink early in the morning when sunlight is less strong, the ground is cooler, and the foliage has time to dry before dusk. Also morning is when it tends to be less windy. Aim for between 5 a.m. and 10 a.m. Oh, and avoid watering in the evening when the damp foliage can attract insects, fungus, and disease.

Water at the correct height.
When you water from too high, a big portion of the moisture is lost either to evaporation or to foliage blocking the water from reaching the soil. The best method is direct watering, in which you aim the water at the base of a plant (avoiding wetting the foliage, which invites fungus.)

Use Mulch
Mulch around your plants to prevent runoff and keep soil wet longer. You can make your own mulch from gathering twigs, leaves and other organic materials

Use a watering can and not a hose.
An open hose is notorious for wasting water. Rather use a watering can.

https://www.gardenista.com/posts/water-wisely-tips-water-garden-plants-best-method/