🍂 Autumn: the season to get ready for… next summer!
Summer 2026: cracked soil, empty water butts, and a daytime watering ban. Here in inland Vendée, about ten kilometres from the coast, we watched the streams run dry and our vegetable patches gasp for water. Everything suggests that the summers ahead will look much the same. The good news? The battle for water is won now, in autumn. Here is our advice for turning your garden into a sponge before winter.
☀️ What summer 2026 taught us
This summer, the Préfecture had to bring in water restrictions from 10 July. In Vendée, almost all our tap water comes from reservoirs: when it doesn't rain, they empty. By early September, less than half of their capacity remained, rivers had run dry almost everywhere, and watering vegetable gardens was banned between 8 am and 8 pm.
Yet our little corner of Vendée has one advantage: the ocean keeps our winters mild, with few hard frosts, and most of our rain falls between October and March. The whole strategy fits in one sentence: catch winter rain and store it in the soil, so it can do its job in summer. And autumn is the perfect season for it.
"There's no drought for a living, well-covered soil… only bare soils that forgot to save for a rainy day." — our mascot, earthworm and part-time philosopher
🌧️ 1. Covered soil drinks the rain; bare soil lets it run away
Remember Laurent's rain simulator? The demonstration speaks for itself: on bare, compacted soil, water runs off and carries the earth with it; on covered soil full of earthworms, it soaks in and stays put. The first heavy autumn rains are on their way: don't leave a single bed bare.
🌿 Wood chips
Our home-made "sponge": 5 to 10 cm on the surface, never dug in. It builds humus and feeds soil fungi, which will hold water for you next summer.
🍁 Fallen leaves
Free and plentiful! Spread them over empty beds, around shrubs and perennials. A little wood chip or straw on top stops them blowing away.
🌾 Straw
To protect artichokes, dahlias or strawberries and to cover paths. The bales from our Straw Operation are waiting at the platform.
⚠️ Never burn garden waste! It's against the law, it pollutes… and it's throwing away the best mulch there is.
🐄 2. Feed the soil: it's manure season
As our practical guide Manure · Compost · Wood chips · Straw reminds us, autumn is the ideal time for manure:
- Well-rotted manure: 3 to 5 kg/m², on the surface, without digging it in. Earthworms will do the work all winter… and dig tunnels along the way that let the rain soak in.
- Mature compost: 2 to 4 kg/m² on beds that will host hungry crops in spring (tomatoes, squash, courgettes).
- No manure where carrots, onions, garlic, potatoes or legumes will grow.
Why does it matter so much in a drought? Because organic matter is a water reservoir: a humus-rich soil can hold several times its own weight in water, whereas a poor soil loses it within days.
🌱 3. Sow green manures: roots that work for you
A bed standing empty until spring? Sow it before mid-October. These plants cover the soil, catch the rain, stop nutrients from being washed away and structure the earth with their roots.
- Phacelia: grows fast, rarely freezes here, and bees love it.
- Rye + vetch mix: the classic winter cover, very dense.
- Field beans: their deep roots break up clay soils and add nitrogen.
In spring, cut them down and leave them on the surface as mulch. No digging needed: Laurent would approve!
🌳 4. Plant trees, hedges and fruit trees: your anti-heatwave investment
The old French saying goes: "On Saint Catherine's Day, every twig takes root" (25 November), and it has never been truer. A tree planted in autumn has the whole winter to settle its roots thanks to the rain, and will face its first summer far better equipped than one planted in spring, which would need watering all summer long… if watering is still allowed.
For a drought-tolerant hedge that is good for wildlife, choose local species: field maple, hawthorn, blackthorn, common dogwood, spindle, wild privet, and, on the lighter soils nearer the coast, holm oak or strawberry tree. For fruit, the heritage varieties of the Pétré Conservation Orchard, selected over generations for our climate, are a safe bet.
A hedge also means shade and shelter from the wind: less wind means less evaporation in the vegetable patch.
Tip: shape a small basin around the young plant, water generously at planting (with rainwater!), then mulch widely: 10 cm of wood chips over a one-metre circle.
🥬 5. The autumn-winter vegetable patch: make the most of the wet season
With our mild winters, the vegetable garden doesn't stop in October. Even better: winter crops thrive on free rainwater.
| Task | What | Why it's clever |
|---|---|---|
| Sow / plant | Broad beans, garlic, shallots, white onions, winter peas | Harvested in May–June, before the heat: no summer watering at all. |
| Sow | Lamb's lettuce, spinach, winter radishes | They love the cool, damp weather. |
| Plant | Cabbages, leeks (last plantings) | Winter harvests, watered by the sky. |
| Divide | Rhubarb, chives, strawberries (runners) | Perennials root themselves over winter. |
💧 6. Collect rainwater… before it falls
This summer, many people in Vendée rushed out to buy a water butt. The right time to install one is now, so it fills up with autumn and winter rain.
- The maths is simple: 1 mm of rain on 1 m² of roof = 1 litre. A 10 mm shower on a 50 m² roof already gives you 500 litres!
- Link several butts together, keep them covered (tiger mosquitoes and algae), and place them close to the vegetable patch.
- A pond, however small, stores water, cools the garden and attracts frogs and toads, great slug eaters.
- For next summer, get some ollas ready (buried terracotta pots) or a drip system: water goes straight to the roots, with no waste.
♻️ 7. The compost bin in autumn: don't miss the "browns" festival
After a dry summer, many compost bins are too dry: nothing breaks down. Water them with rainwater until the contents feel like a wrung-out sponge.
And stock up on fallen leaves! They are carbon-rich "brown" materials, precious all year round to balance out kitchen peelings. At the platform too, the windrow is short of them: 1 volume of food caddy for 3 volumes of wood chips is the rule.
Not sure about your compost? Ask Doctor Compost.
🦔 8. Leave a little mess: let nature do the work
- Keep a pile of leaves and branches in a quiet corner: it's a winter hotel for hedgehogs, who will rid you of slugs in spring.
- Don't cut back all the dry stems: many helpful insects spend the winter inside them.
- When the leaves fall, look up: this is when Asian hornet nests become visible high in the trees. Don't destroy them yourself; report them to the town hall. Trapping comes in spring (see our hornet trap guide).
🗓️ 9. Start planning summer 2027 now
Autumn is also the time to review the summer, while it's still fresh in your mind:
- Which plants coped? Note the varieties that stood up to the heat and save their seeds for the Seed Swap and next spring's Plant Swap.
- Group thirsty crops (tomatoes, courgettes, cucumbers) close to your water supply, and plan some shade.
- Bring the calendar forward: plant earlier in spring, so you harvest before the July heatwaves.
- Less lawn, more ground cover: a lawn that turns yellow in summer recovers with the rain, so there's no need to water it.
- And re-read our guide Heatwaves: garden and greenhouses: you'll need it from June onwards.
📋 In short: the Vendée gardener's autumn calendar
| Month | To do |
|---|---|
| Late September | Install water butts · sow green manures and lamb's lettuce · re-moisten the compost bin |
| October | Mulch every empty bed · spread manure and compost on the surface · plant garlic and shallots · last green manures |
| November | Plant hedges, trees and fruit trees (Saint Catherine's Day!) · sow broad beans · store fallen leaves |
| December | Rotted manure on next year's beds · protect tender plants · plan summer 2027 |
📍 Stock up at the Grosbreuil platform
As a member (€2 a year), you can collect wood chips, compost, manure and straw bales (€2.50 each) to get your garden ready for the dry season.
Open Wednesdays and Saturdays, 10 am to noon · stock varies · Join the association
With the climate changing, we can't make it rain (except Laurent, with his simulator). But we can make every drop count. So this autumn: cover, feed, plant, store. Your garden will thank you in July! 🌱
To check the water restrictions currently in force in your area: VigiEau (in French) · Préfecture de la Vendée.
More on our website: The blog · All our practical guides
