Turf heating occurs when rolled-up turf is exposed to hot and humid conditions, leading to heat stress and potential damage to the grass. This guide will help you understand what turf heating is, how to prevent it, and how to revive turf that has suffered from heat stress.
WHAT IS TURF HEATING?
Turf heating refers to the damage that occurs when turf rolls are exposed to high temperatures and humidity while being transported or stored. This can happen very quickly, often within 24 hours of the turf being harvested. The heat buildup within the rolled turf can lead to various symptoms, such as yellowing, blackening, a greasy appearance, a stagnant smell, and brown patches or streaks.
Turf rolls contain living grass plants that are breathing all the time. When the turf is cool, the respiration rate is slower, but warm turf breathes faster, generating more heat. Turf rolls act as insulating materials, trapping this heat and preventing it from escaping. Additionally, microorganisms within the turf consume oxygen and generate further heat, exacerbating the problem.
SYMPTOMS OF TURF HEATING
When turf experiences heat stress, several symptoms can become evident. Initially, the grass blades may start turning yellow, indicating the early stages of stress. As the condition worsens, the grass can turn black, which signifies significant damage. Additionally, the turf might develop a greasy appearance, suggesting that the grass cells are breaking down.
A foul, stagnant odour is another indicator, pointing to anaerobic conditions caused by oxygen depletion. Finally, irregular brown patches or streaks may appear, highlighting uneven heating and stress distribution across the turf.
HOW TO PREVENT TURF HEATING
Preventing turf heating involves proper handling and storage practices, especially during hot and humid weather.
Immediate unrolling of the turf – Upon receiving the turf delivery, unroll the turf immediately. This allows the heat to dissipate and prevents it from becoming trapped and causing damage.
Cool storage – If immediate installation isn’t possible, store the turf in a cool, shaded area. Avoid direct sunlight and hot surfaces, as these can increase the temperature of the turf rolls.
Timing – Schedule the delivery of your turf only when you know the ground is fully prepared and you have the time to install the turf straight away on delivery. We advise take extra care between April and September when the temperature is forecast from 15 degrees or higher. We would also advise to avoid laying turf on extremely hot days when the temperature is 25 degrees or above.
HOW TO REVIVE TURF AFTER TURF HEATING
If your turf has suffered from heat stress, immediate and thorough action is required to revive it. Begin by unrolling the turf as soon as symptoms are noticed to allow it to cool down and air out.
Next, water the turf deeply and evenly to help it recover from dehydration and heat stress, ensuring that the soil remains moist but not waterlogged. Providing temporary shade and good ventilation can protect the turf from further heat stress while reducing the temperature and humidity around it. For tips on watering newly laid turf read our dedicated blog post on this topic.
Additionally, applying a balanced fertiliser can support new growth and recovery, but be sure to follow recommended application rates to avoid over-fertilising. Finally, closely monitor the turf over the following days and weeks, maintaining regular watering and addressing any signs of disease to ensure a full recovery.
PREVENTING TURF HEATING
Turf heating is a common issue during hot and humid weather, but with proper handling and care, it can be prevented and managed effectively. By understanding the causes of turf heating and taking proactive steps, you can ensure the health and vitality of your turf, whether it’s for a sports field, golf course, or residential lawn.
Regular monitoring, timely interventions, and good turf management practices are key to maintaining healthy turf even under challenging weather conditions. With these strategies, you can mitigate the effects of turf heating and keep your grass looking its best all year round.
For more information have a look at our article on How to lay turf.
