Be waterwise this summer

Diascia. PA Photo/Thinkstockphotos
Diascia. PA Photo/Thinkstockphotos

We may have had the warmest spring on record, but last winter was also the wettest, so we are a long way from a drought and hosepipe ban.

However, with experts predicting the dry weather is here to stay, gardeners will be working out ways to save water.

The Royal Horticultural Society offers the following tips to gardeners who want to put the water where it’s most needed:

:: Established trees and shrubs do not generally need watering as they have such wide-ranging roots that they are drought-proof. However, their growth may be improved by watering when they are under drought stress

:: Trees and shrubs planted less than five years ago have increased water requirements and may suffer drought stress without watering

:: Newly sown or newly planted areas are very vulnerable to water stress, so watering these should be a high priority

:: Herbaceous perennials often need watering to boost their performance in hot, dry spells. Plant choice is crucial if you want to achieve a drought-proof border. Drought resistant plants include cordyline, hebe, lavender, Verbena bonariensis, eryngium, euphorbia, diascia, cosmos, gazania, nemesia and, of course, pelargoniums. Many drought-tolerant plants have silver or grey-green leaves, their light leaf colour reflecting the harsh rays of the sun.

:: The yields and quality of vegetables and fruit are greatly improved by watering at times when drought stress would affect the part of the plant that is gathered. Leafy crops such as lettuce and spinach should never be short of water. Onions require little or no watering. Most other crops need watering at sowing and transplanting time, and then again as the fruits, roots or tubers are developing. It is also a good idea to give a single, thorough watering about two weeks before harvest

:: Lawns require great quantities of water for thorough irrigation, but instead of watering in dry periods, mow less closely and less frequently. Brown patches usually recover when the autumn rains return.

:: Mulching with a layer of organic matter or gravel at least 5cm (2in) thick reduces moisture loss from the upper layers of the soil.

Less than 3% of the annual water consumption of an average household is estimated to be from garden use, but at peak times as much as 70% of water supplied may be used in gardens.

Even in dry districts, 24,000 litres (5,280 gallons or 150 water butts) could be collected from the roof each year, says the RHS.

Sean Laverick of the Homebase Garden Academy advises waterwise gardeners to store their water in water butts and invest in a water butt pump which enables you to use your hose with a water butt.