Hot Weather Jobs for Trees: Essential Care During Summer Heat

1. Watering

Watering is the most critical task during hot weather. Trees require consistent moisture to survive heat stress, especially younger trees with less established root systems. Here are some guidelines for effective watering:

• Deep Watering: Trees need deep watering to encourage roots to grow downwards. Water the base of the tree slowly and deeply, ensuring the soil is moistened to a depth of at least 12 inches. This helps the roots access cooler soil layers and reduces surface evaporation.
• Frequency: Water trees early in the morning or late in the evening to minimise evaporation. For most mature trees, watering once a week is sufficient, while young or newly planted trees may need more frequent watering.
• Mulching: Applying a layer of organic mulch around the base of the tree helps retain soil moisture, regulate soil temperature, and reduce weed competition. Mulch should be spread in a 2-4 inch layer, leaving space around the trunk to prevent rot.

2. Protecting the Trunk and Roots

During hot weather, the sun can cause significant damage to a tree’s bark, particularly on young trees or those with thin bark. Protect the trunk by wrapping it with a tree guard or painting it with diluted white latex paint to reflect sunlight and prevent sunscald.

Additionally, avoid damaging the roots by keeping the area around the tree base clear of heavy foot traffic and mechanical equipment. Compacted soil can restrict root growth and water absorption, exacerbating heat stress.

3. Pruning and Deadwood Removal

While major pruning should generally be avoided in the heat of summer to prevent additional stress, removing dead or damaged branches is beneficial. Deadwood can be a pathway for pests and diseases, which are more active in warm weather. Light pruning to remove broken or crossing branches can also improve air circulation within the canopy, reducing the risk of fungal infections.

4. Monitoring for Pests and Diseases

Hot weather can increase the activity of various pests and diseases that can harm trees. Regularly inspect trees for signs of infestation, such as holes in leaves, wilting, or unusual growths. Early detection and treatment are crucial in managing these issues. If you notice any signs of trouble, consult a local arborist or extension service for advice on the appropriate treatment.

5. Avoiding Fertilisation

In extreme heat, it’s best to avoid fertilising trees. Fertilisers can encourage new growth, which is more susceptible to heat stress and can increase the tree’s water needs. Instead, focus on maintaining adequate moisture levels and monitoring tree health.