Autumn Garden: August Planting Guide

July 25, 2025

Phew!

The heatwaves are finally over, a few drops of rain have fallen, and gardens are slowly coming back to life.

But what if the last heatwaves have destroyed your favorite plants?
And above all, how can you prevent it from happening again?

We’ve gathered ideas, images, and inspiration for you — to help you start thinking about creating an autumn garden that truly blooms in fall.

Stipa tenuifolia + Salvia nemorosa

Autumn: The Ideal Time to Plant

Autumn is the perfect season for planting — almost everything!
But let’s not forget that August is still a summer month, often marked by extreme and unpredictable temperatures.

Creating a Sustainable Autumn Garden

That’s why it’s important to carefully choose what you plant now — filling the gaps left by heatwaves while preparing a more resilient garden for the future.

What if this were the perfect opportunity to introduce drought-resistant plants?
That way, your garden will remain beautiful and vibrant, whatever the weather brings.

Perennials planted in autumn benefit from several months to develop a strong root system before the next summer arrives. Deep, well-established roots help them better withstand drought and heat — and allow them to thrive as soon as spring begins.

Many of the perennials we suggest here have evergreen foliage, adding structure and interest to the garden even during cold, rainy winter days.

And don’t forget mulching (wood chips, miscanthus, etc.): a simple but highly effective action to protect the soil, retain moisture, and nourish underground life. A small effort for big benefits — with no downside.

NOTA BENE

Whatever you plant, it is generally recommended to do so in spring or autumn, when temperatures are cooler and water is more readily available in the soil.

BUT if you really want to plant in August, here are a few precautions to help your plants get off to a good start:

Do your gardening and planting in the evening — temperatures will be cooler, and both you and your plants will be grateful.
💧 Water the plant in its pot while you dig the hole.
The hole should be 2 to 3 times wider than the root ball, with the base of the leaves slightly below soil level — this helps water reach the roots. Think “bowl” rather than “pyramid.”
💧 Water the plant after transplanting.
Cover the planted area with dry grass and wood chips, then another layer of dry grass and chips.
💧 Water again.

It may seem obvious, but planting during a heatwave is not recommended. Young plants won’t survive 40°C (104°F) in their first week.

The Asters

Highly valued by pollinators and lovers of natural gardens, asters offer an explosion of color in late summer, ranging from pure white to deep purple. Their late flowering provides a precious source of nectar for bees and butterflies when few other plants are still blooming — an essential ally in extending garden life into early autumn.

💧 Drought-resistant
🌞 Full sun lover
❄️ Frost-hardy
🛡️ Resistant to diseases and slugs 🐌

The Chrysanthemums or Mums for short

Essential autumn plants, chrysanthemums charm both gardeners and pollinating insects with their generous, colorful blooms at a time when nature begins to slow down. From bright yellow to deep purple, their palette lights up flower beds late into the season. Last year at the nursery, we were amazed by the activity of bees and butterflies around these flowers — true beacons for autumn biodiversity.

💧 Drought-resistant but prefers mulching
🌞 Loves full sun
❄️ Frost-hardy
🛡️ Resistant to diseases and slugs 🐌

The Cistus or Rockroses

Sun-loving stars of dry gardens, rockroses delight with their abundant spring blooms and often aromatic foliage. Highly appreciated by bees, they bring color, fragrance, and life to Mediterranean-style borders while requiring little maintenance. Their short-lived but numerous flowers range from pure white to deep pink and attract crowds of insects as soon as warm days arrive — a real asset for a resilient, biodiversity-rich garden.

💧 Drought-resistant
🌞 Loves full sun
❄️ Frost-hardy
🛡️ Resistant to diseases and slugs 🐌