How to Protect Plants from Heat?

By Peter Schultz

Author bio: Peter Schultz is a professional gardener with a deep-rooted passion for plants. He offers expert advice, practical tips, and insightful resources to help you unlock the full potential of your green spaces at

As summer temperatures soar, you can face the challenge of keeping your beloved plants healthy and thriving in your raised beds. Heat stress can be detrimental to plants, causing wilting, leaf scorch, and even death. However, with the right strategies in place, you can shield your plants from excessive heat and ensure their well-being. In this article, we will explore effective methods to protect your plants from heat!



Proper watering techniques play a crucial role in safeguarding plants against the scorching heat. It's essential to understand how and when to water your plants to maintain their hydration levels effectively.

How and When to Water the raised bed?

When it comes to watering, it's all about finding the right balance. Deep and infrequent watering is key to promoting healthy root growth and preventing water loss through evaporation. Here's a simple watering guide:

  • Water deeply: Aim to provide a thorough soaking to the root zone rather than light, frequent sprinkling. This encourages the roots to grow deeper, making the plants more resilient to heat stress.
  • Time it right: Water your plants in the early morning or late afternoon when temperatures are cooler. This allows the plants to absorb moisture before the heat of the day sets in.
  • Direct the water: Ensure that you water the soil directly at the base of the plants, avoiding foliage as much as possible. Watering the leaves during the hot sun can lead to scorching and increase the risk of fungal diseases.

Also read: Proper Watering Techniques for Plants in Raised Beds.



Mulching is an excellent technique to keep the soil cool, retain moisture, and suppress weed growth. It acts as a protective blanket for your plants, shielding them from the intense heat of the sun. Let's delve into how and when to use mulch effectively.

How and when to use mulch the raised beds

  • Apply the right thickness: Spread a layer of mulch around 2 to 4 inches thick on the soil surface around your plants. This helps insulate the soil and regulate its temperature.
  • Keep it away from stems: Avoid piling mulch directly against the stems or trunks of plants. This prevents excessive moisture buildup and potential rotting or disease issues.
  • Choose the right mulch: Different mulch materials offer varying benefits. Organic mulch options like straw, wood chips, or shredded leaves provide insulation while enriching the soil as they break down over time.
  • Mulch before the heat hits: Apply mulch in late spring or early summer before the heat intensifies. This helps establish a cool environment for the roots and conserve soil moisture.

Raised Beds

Raised beds are a valuable asset in helping plants thrive during hot weather. They provide several benefits that contribute to the plants ability to withstand heat stress and maintain optimal growth.

  • Retained soil moisture: Raised beds retain soil moisture effectively, crucial during hot weather when plants require more water. The slow drying rate of the soil in raised beds prevents heat stress in plants, compared to traditional garden beds.
  • Better drainage: Raised beds offer superior drainage compared to traditional garden beds, preventing waterlogging and root rot during heavy rain or watering. This is essential in hot weather when plants need sufficient water but also require good drainage to avoid heat stress.
  • Elevated position: Raised beds are elevated above the ground, preventing soil compaction and promoting better air circulation around the plants. This feature helps prevent heat stress in plants and supports healthy growth.
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When the sun's rays become too intense, providing shade for your plants becomes vital. Creating shade not only protects them from direct sunlight but also helps regulate temperature and reduces the risk of heat stress. Let's explore some actionable and creative shade ideas to keep your plants cool.

DIY Shade Ideas

  • Shade Cloth Canopies: Install shade cloth canopies over your garden beds or specific areas to provide filtered sunlight. This allows plants to receive sufficient light while reducing the intensity of the heat.
  • Umbrellas and Parasols: Use large umbrellas or parasols strategically placed to cast shade on delicate plants during the hottest parts of the day. This portable shade solution allows you to adjust its position as the sun moves.
  • Trellises with Climbing Vines: Utilize trellises and allow climbing vines like morning glories or passionflowers to grow on them. The dense foliage acts as a natural shade for lower-growing plants, offering protection from the sun's direct rays.

Companion Plants as Shades

Certain companion plants have sprawling or bushy growth habits that can provide shade and protect more sun-sensitive plants. Consider these companions to create natural shade in your garden:

  • Tall Sunflowers: Plant tall sunflowers, such as the Mammoth variety, near smaller plants that require protection. The sunflowers' height and large leaves create shade for the plants beneath them.
  • Leafy Vegetables: Grow leafy vegetables like lettuce around delicate plants. The broad leaves of these vegetables provide shade and help keep the soil moisture levels consistent.
  • Perennial Herbs: Plant perennial herbs like oregano or thyme near sun-sensitive plants. These low-growing herbs form dense mats of foliage that act as natural shade providers.

Remember to choose companion plants that have compatible growing requirements and complement the aesthetics of your garden.


Congratulations! You're now armed with valuable strategies to safeguard your plants from the scorching heat. Remember, as you embark on your journey to protect your plants from heat, let your creativity and love for gardening guide you. Experiment with different techniques, discover new companion plants, and adapt to the unique needs of your garden. Happy gardening!

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