How to Prepare Your Outdoor Plants for Summer Heat

Summer can be tough on your plants — but with the right preparation, your garden can thrive through heatwaves. Here's how to get your outdoor plants ready for the hottest season.
Woman with jugs in garden

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Summer is a time of vibrant growth — but also scorching sun, dry winds, and dehydrated soil. If your outdoor plants aren’t properly prepared, they might wilt, burn, or stop blooming altogether. Luckily, a few smart adjustments can help your garden not just survive, but thrive, in the hottest months.

Whether you’re growing flowers, herbs, or shrubs, this guide will walk you through essential steps to get your garden summer-ready.

Water Smarter, Not More

When it comes to summer watering, frequency isn’t as important as depth. Shallow watering leads to weak roots, while deep watering encourages plants to develop strong root systems that can access water deeper in the soil.

  • Water early in the morning to reduce evaporation and prevent mildew.
  • Use a slow-drip system or soaker hose to keep moisture at the root zone.
  • For pots, place a saucer underneath to catch overflow and extend moisture availability.
watering plants on flowerbed in summer garden

Add a Protective Layer of Mulch

Mulch is your best friend in the summer. It helps retain soil moisture, regulates temperature, and prevents weeds that compete for water.

  • Use organic mulch like shredded bark, straw, compost, or dried grass clippings.
  • Apply 5–7 cm (2–3 inches) around the base of your plants — but avoid piling it against the stems.

Provide Shade Where Needed

Some plants, especially young or tender ones, need a little protection from intense midday sun.

  • Use shade cloth, garden umbrellas, or even repurposed bed sheets for temporary shade.
  • Place tall plants or trellises strategically to cast shade on more delicate species.
Blurred green shadow surround gardener

Choose the Right Fertilizer

Fertilizing in summer requires care. Too much nitrogen can encourage leafy growth at the expense of flowers, and may stress plants in heat.

  • Use slow-release or organic fertilizers like compost, worm castings, or diluted fish emulsion.
  • Avoid fertilizing during extreme heatwaves — wait for a cooler day.

Trim and Deadhead Regularly

Summer is a time of fast growth — and sometimes messy growth. Keep your garden tidy and healthy by removing spent blooms and dead leaves.

  • Deadheading encourages more blooms and redirects energy to growth.
  • Prune overgrown areas to allow better air circulation and light penetration.

Upgrade Your Pots

Terracotta pots are beautiful but dry out quickly in the sun. Consider switching to glazed ceramic or plastic containers during summer months.

  • Choose light-colored pots to reflect sunlight and reduce root heat.
  • Double-pot delicate plants: place the plant’s pot inside a larger container with insulating material in between.
kid at the balcony watering plants with a spray

Don’t Forget Wind Protection

Hot winds can be just as damaging as sun, drying out leaves and soil quickly.

  • Use garden fencing, hedges, or strategically placed trellises as windbreaks.
  • Group plants together to create microclimates and retain moisture.

Summer Stars: Plants That Love the Heat

If you’re planting new additions, consider heat-loving, drought-tolerant varieties. Here are a few to try:

  • Lavender – Fragrant and sun-loving with minimal water needs
  • Salvia – Long blooming and pollinator-friendly
  • Portulaca (Moss Rose) – Colorful and extremely drought-tolerant
  • Coreopsis – Bright flowers that handle sun and dry soil
  • Succulents – Excellent for containers and require very little care

“Don’t fear the heat — prepare for it. A summer-ready garden is a beautiful, resilient space that rewards you all season long.”

By following these steps, you’ll give your outdoor plants a strong advantage against summer stress. A little effort in spring and early summer can save you from headaches — and drooping flowers — later. Stay cool, and so will your garden!

Looking for sun-loving plants that can handle the summer heat? Check out our guide to the Best Outdoor Plants for Full Sun Gardens for inspiration and practical tips.

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