Care Measures
All lawns require special care measures during dry weather. When deprived of water, lawn grasses may stop growing and start to brown, especially once the top 10cm (4in) of soil dries out.
Ornamental lawns of fine bent-type grasses are most likely to suffer. General garden lawns containing fescue grasses may have more resistance.
A well-maintained lawn usually recovers rapidly with the onset of autumn rainfall, especially if appropriate autumn lawn care is given.
However, in extended periods of drought, or where the lawn is not well maintained, lawn grasses can become weakened and their roots deteriorate. If the grass becomes sparse, weeds and moss easily establish with the onset of autumn rains. Remedial action may be necessary.
If summers become hotter and drier, as predicted, the issue of caring for lawns in drought will become more pressing, as water may be too scarce for lawns to be watered
Watering
Water newly created lawns thoroughly – provided there are no hosepipe restrictions in force.
For established lawns that must be kept green, water once the soil becomes dry, but before the grass colour changes. If the ground is very hard, aerate it by spiking with a garden fork before watering, to aid water penetration.
Water the lawn in early morning, evening or even night-time, to reduce water wastage from evaporation.
Watering once every seven to 10 days is normally sufficient. It is important not to apply too much water. This is wasteful, encourages shallow rooting of the grass and promotes moss and turf diseases. Excessive watering makes the lawn less drought-tolerant in case of hosepipe bans or holidays when watering is discontinued.
Ensure that the water reaches a depth of 10cm (4in) after each watering. Use a trowel to open a small test hole a few hours later to ensure the soil is sufficiently damp. By noting the duration of watering required to achieve this level of dampness, future irrigation can be more accurately applied