5 Smart Ways to Protect Your Garden From a Heatwave—Before It’s Too Late

Summer has arrived, bringing with it the intense heatwaves we often anticipate this time of year. Even the most heat-resistant plants can feel overwhelmed during a sudden heatwave, leading to issues such as wilting, leaf burn, and, in severe cases, death. The good news is that if a scorching forecast is on the horizon, there are proactive steps you can take to protect your garden plants from the damaging effects of heat. By putting these expert-recommended strategies into action, you can help ensure your plants stay safe and thriving even as temperatures rise.

Water Deeply

High temperatures increase the need for watering because plants lose more water as temperatures rise. To avoid this, Emily Scott, co-owner of Scott Farm in Maine, says to give your plants a deep soak when you water, as evenly moist soil will help maintain a more consistent temperature and prevent it from drying out.

Water in the Morning

Scott recommends watering your plants in the morning as this will help them prepare for the long hours of bright sunshine ahead. She explains that watering during the early hours allows plants to retain water more effectively than watering during the hottest part of the day. Additionally, consider watering again in the evening when the sun isn't shining directly on your plants.

Use Mulch to Retain Moisture

Mulch is an excellent defense against hot weather. Scott notes that mulch not only helps keep unwanted weeds at bay but also retains moisture and protects plant roots from drying out. Apply two to three inches of mulch around your garden plants, ensuring you do not pile it up against their stems, as this can lead to rot. To help lock in moisture, water the mulch after applying it.

Don't Miss

9 Succulent Garden Ideas That Will Add Sculptural Dimension to Your Landscape

15 Full-Sun Perennials That Come Back Bigger and Better Every Year

Move Potted Plants into the Shade

When a heatwave is on the horizon, one of the first steps you can take is to move your potted plants into a shaded area. According to Scott, potted plants can dry out quickly and are often the first to suffer in soaring temperatures. Relocating them to a shady spot, especially during peak sun hours, will help them endure the heat. Remember to water your potted plants in the morning after moving them to their sheltered location.

Utilize Microorganisms

The beneficial bacteria in actively aerated worm tea can help prepare your garden for increased heat stress, says Eric Nieusma, co-owner of Maine Hill Farm. "These bacteria, present in high-quality worm castings, improve soil fertility and are essential for plant growth and photosynthesis." If possible, brew a 24-hour aerated worm tea and apply it to the soil early in the morning on a hot day. Alternatively, if you prefer using a product that adds beneficial photosynthetic bacteria to your garden, consider using Quantum Growth Organic Light. Regularly adding these beneficial bacteria to your garden will enhance your plants' heat tolerance and improve their ability to absorb light.

Incorporate Shade Cloths

Shade cloths serve as an effective solution for providing temporary sun protection to plants. They function as a physical barrier, preventing leaf burn while simultaneously reducing soil and air temperatures in the surrounding environment. You can install shade cloths before a heatwave using stakes or hoops, depending on the specific crop requirements.