Essential Heatwave Tips for Plant Care and Top Drought-Tolerant Plants to Use in Your Garden
Summer heatwaves can put a lot of stress on your garden. Plants struggle to stay hydrated and healthy when temperatures soar and rainfall becomes scarce. For beginner gardeners, it can be challenging to know how to protect your plants and keep your garden thriving during these tough conditions. This guide offers practical tips for caring for your plants during heatwaves and introduces some of the best drought-tolerant plants to include in your borders. These plants not only survive but often thrive in hot, dry environments, making your garden more resilient and easier to maintain.
How Heatwaves Affect Your Garden
Heatwaves cause soil to dry out quickly, making it harder for plants to absorb the water they need. High temperatures increase evaporation from both soil and plant leaves, leading to wilting and leaf scorch. If plants do not get enough water, they become weak and more vulnerable to pests and diseases. Understanding how to manage water and choose the right plants can help you keep your garden healthy even during prolonged dry spells.
Watering Tips for Heatwaves
Watering your plants correctly during a heatwave is crucial. Here are some simple but effective tips:
Water early in the morning: This allows water to soak into the soil before the heat of the day causes rapid evaporation. It also helps plants absorb moisture before they face the stress of midday sun.
Avoid watering in the heat of the afternoon: Watering during the hottest part of the day wastes water and can cause leaf burn if water droplets act like tiny magnifying glasses.
Water deeply and less frequently: Deep watering encourages roots to grow downwards, making plants more drought-resistant. Shallow watering leads to weak roots near the surface.
Use a watering can or drip irrigation: These methods deliver water directly to the soil and roots, reducing waste and keeping foliage dry to prevent fungal diseases.
Mulching to Retain Soil Moisture
Adding a layer of mulch around your plants is one of the best ways to keep soil moist during heatwaves. Mulch acts as a barrier that slows down evaporation and keeps the soil cooler. Organic mulches like bark chips, straw, or compost also improve soil quality as they break down.
Spread mulch 2-3 inches thick around plants, but keep it a few inches away from stems to prevent rot.
Mulching reduces the need for frequent watering and helps protect plant roots from temperature extremes.
Hold Off on Feeding and Deadheading
During heatwaves, plants focus their energy on survival rather than growth. Avoid feeding (fertilising) or deadheading (removing spent flowers) during this time. Fertilisers can encourage new growth that is vulnerable to heat stress, and deadheading can cause unnecessary strain. Wait until temperatures cool down to resume these tasks.
Top Highly Drought-Tolerant Plants for Your Garden Borders
Choosing plants that naturally tolerate dry conditions is key to a low-maintenance garden that withstands heatwaves. These plants have deep root systems or water-saving foliage and thrive in hot, dry, and well-drained soils and are some of the plants that we include in our border kits.
Achillea (Yarrow)
Yarrow is a hardy perennial with feathery leaves and flat clusters of flowers. It thrives in poor soil and full sun, tolerating drought once established.
Calamagrostis (Karl Foerster / Overdam)
This ornamental grass is exceptionally adaptable. It handles dry spells easily and adds vertical interest with its tall, graceful plumes.
Echinacea (Pink / Red Coneflowers)
Coneflowers love baking in the summer sun. Their daisy-like blooms attract pollinators and require very little water once settled.
Salvia
Many salvias are drought-tolerant and bloom profusely in hot weather. They attract bees and butterflies, making them great for wildlife-friendly gardens.
Stipa (Feather Grass)
Feather grass thrives on neglect and lean, dry soils. Its fine, wispy foliage moves beautifully in the breeze.
Verbena
Verbena is tough and drought-resistant, producing clusters of small, colourful flowers that brighten borders and attract pollinators.
Moderately Drought-Tolerant Plants That Adapt Well
These plants prefer average, well-drained soil but can survive short dry spells or heatwaves without damage. They are good choices if your garden soil retains some moisture or you can water occasionally.
Astrantia (Masterwort)
Prefers moist soil but adapts well to short dry spells once established. Its unique star-shaped flowers add charm to borders.
Campanula (Bellflower)
Bellflowers tolerate low water levels once their roots are established. They produce bell-shaped blooms in various colors.
Carex buchananii (Sedge)
This grass-like plant is marginally drought-tolerant. It shows its best bronze colour with regular watering but can survive dry periods.
Geranium Ballerina & Geranium Endressii (Hardy Cranesbills)
Tough ground covers that endure dry shade or sun well. They provide long-lasting flowers and attractive foliage.
Leucanthemum (May Queen / Broadway Lights)
Standard daisies that handle normal summer dry spells without wilting.
Saponaria (Soapwort)
Soapwort is resilient and copes well with dry intervals, producing clusters of pink or white flowers.
Scabiosa (Butterfly Blue)
Loves sun and sharp drainage. It copes well with dry intervals and attracts butterflies.
Practical Steps to Prepare Your Garden for Heatwaves
Choose drought-tolerant plants for new borders: Incorporate the plants listed above to build a resilient garden.
Apply mulch before the heatwave hits: This helps retain moisture and protects roots.
Water deeply early in the morning: Focus on root zones rather than leaves.
Avoid feeding and deadheading during heatwaves: Let plants conserve energy.
Check soil moisture regularly: Use a trowel or finger to feel if the soil is dry several inches down.
Group plants with similar water needs: This makes watering more efficient and prevents over watering.
Comments