Top tips for watering plants in summer

Thirsty work

Water is crucial to your plants’ survival, especially during summer when the high temperatures and scorching sun can make it difficult for them to get enough moisture naturally from the environment. Plants need water to transport nutrients from the soil via their roots, to cool them down through transpiration and to maintain their structure (water keeps plant cells firm – without it they will wilt). It’s also essential for photosynthesis, the process by which plants use water, carbon dioxide and sunlight to create oxygen and energy.

Water by hand

A watering can is an easy, budget-friendly way to give plants a drink and is ideal for watering small areas, raised beds or indoor plants. Look for a can that holds several litres of water (but won’t be too heavy for the user to handle when it’s full of water, or too big for small pots) and has a rose head attachment to create a gentle shower.

For larger areas such as lawns, go for a kink-resistant hose in a retractable reel that can be mounted on a wall or fence and attach it to a simple spike sprinkler. Garden designer Claire Talbot of Sculpt Gardens says a hose is also a good option for plants that need a deeper soak, such as recently planted trees and shrubs. “A good deep watering encourages downward root growth,” advises Claire. “Use a handheld hose or set up a soaker hose and turn it on once a week for a good long water. Then check it has soaked deep into the soil.

Install a system

To set up an irrigation system from scratch, look for a starter kit that contains all the key pieces you need, but which can be supplemented with additional items to suit the design of your garden. Drip irrigation delivers water slowly and directly to the plant roots through a network of tubes and emitters, and is an efficient option for many gardens. Add a timer to keep your plants hydrated while you’re away from home. “A simple timer set for early morning and late evening will ensure your veges are still alive when you get back from your holidays,” says Claire.

When planning an irrigation system, remember not all plants have the same watering needs. “If you have established plants that are suited to our climate, such as New Zealand natives or species that are used to periods of hot dry spells like Australian or South African plants, they shouldn’t need much watering unless it’s an exceptionally hot summer,” says Claire. On the other hand, plants such as roses, which originate from cooler climates, will require more watering.

Set up for success

When planning a new garden or seasonal plantings, it’s important to take watering into account. “Try to group plants that have similar watering needs together,” advises Claire. “For example, put all the veges that will need twice-a-day watering through summer in one spot. Remember, irrigation pipes can be hidden underneath a good thick layer of mulch.” If there are water restrictions in your area, consider installing a rainwater collection system using a diverter from a drain downpipe attached to a barrel or a tank. But first check with your local authority if its location, size and intended use require consent or a permit.

Get a helping hand with watering

Learn how to install a system of irrigation sprayers and drippers.