A vegetable garden in a heatwave needs protection before plants start to collapse.
The goal is to keep moisture in the soil and reduce stress during the hottest hours.
Water early in the morning, before the sun becomes strong. A deep watering is better than a quick surface splash because it reaches the roots.
Add mulch around plants with straw, dry grass clippings or shredded leaves. Mulch slows evaporation and keeps the soil cooler.
Use shade cloth, crates or light fabric during the hottest hours. Leave enough airflow so plants do not overheat under the cover.
Do not prune heavily during a heatwave. Leaves help protect the plant. Avoid fertilizing stressed plants until temperatures become milder.
Check containers twice a day because pots dry faster than garden beds. Move small pots to partial shade if possible.
Deep watering, mulch and temporary shade can help a vegetable garden survive extreme heat with less damage.