Garden Mulching Tips for UK Heatwave August 2025

Published: August 11, 2025 | Willis & Ainsworth Garden Centre | Reading time: 4 minutes

HEAT ALERT: This Week's Forecast

The UK is experiencing another significant heatwave with temperatures reaching up to 32°C in some areas. The Met Office confirms this is the third official heatwave of summer 2025, with particularly high temperatures expected to continue through mid-August.

Weather Data Sources: Information based on Met Office official forecasts and weather warnings issued for August 2025.

Current UK Heat Conditions

This week has brought exceptional heat across much of the UK, with temperatures reaching 31-32°C in southern England and climbing into the low 30s more widely. According to Met Office data, this represents the third official heatwave of what has already been an exceptionally warm summer.

The current heatwave is expected to be longer-lasting and cover a broader area than previous hot spells this summer, extending further north and west across the UK. With overnight temperatures remaining high in many areas—some locations not dropping below 20°C—gardens are facing sustained stress that makes moisture retention absolutely critical.

Why Mulching is Your Garden's Best Defense

During extreme heat like we're experiencing this week, mulching becomes one of the most important things you can do for your garden. It's not just about aesthetics—it's about plant survival and water conservation.

Best Mulching Practices for Hot Weather

Willis & Ainsworth's Premium Mulch Materials for Heat Protection

• Ornamental Whole Tree Chip 40mm: Our premium choice for excellent insulation and attractive appearance. The larger chip size provides superior heat protection and longer-lasting coverage. Delivered from £127.80 (Inc. Tax)
• 20mm Compost: Perfect dual-purpose option that provides excellent moisture retention while feeding your plants during stressful heat conditions. Delivered from £105 (Inc. Tax)
• Woodchip Mulch: A versatile, cost-effective option that provides excellent moisture retention and heat protection. Perfect for larger areas. Delivered from £108.25 (Inc. Tax)
• 20mm Woodchip Fines (Soil Improver): Ideal for delicate plants and areas where you want to improve soil structure while providing mulching benefits. Delivered from £127.80 (Inc. Tax)
• Standard Woodchip: Our most economical option for effective heat protection and moisture retention across extensive garden areas. Delivered from £101.65 (Inc. Tax)
• Contract Ornamental Bark 10-40mm: Professional-grade bark mulch for premium landscaping projects requiring superior heat protection and aesthetic appeal

Watering and Mulching: The Perfect Partnership

During this week's extreme temperatures, combine smart watering with proper mulching for maximum effectiveness:

• Water deeply before applying fresh mulch
• Water early morning (6-8 AM) when evaporation is minimal
• Use drip irrigation or soaker hoses under mulch for efficient delivery
• Check soil moisture by inserting your finger 5cm into the mulch

Emergency Plant Care During Heatwaves

If you haven't mulched yet and temperatures are soaring, take these immediate steps:

• Create temporary shade with garden fabric or umbrellas
• Move potted plants to shadier locations
• Apply mulch immediately, even if conditions aren't perfect
• Increase watering frequency but reduce amount per session
• Focus on vulnerable plants: newly planted, shallow-rooted, or stressed plants

Need Quality Mulch for Your Garden?

Don't let this heatwave damage your precious plants. Visit Willis & Ainsworth for premium mulching materials and expert advice on protecting your garden during extreme weather.

CALL US: 01635 865 679

Contact us for delivery options during the heatwave

Sources: Temperature and weather data sources: Met Office official forecasts, Met Office Chief Meteorologist reports, and official UK weather warnings for August 2025. Garden care recommendations based on Royal Horticultural Society guidelines and professional horticultural practices.