A sustainable garden step by step

A sustainable garden isn't a neglected garden: it's one designed to work with local resources, generate little waste and shelter life. What's more, once established, it gives less work and less expense than a conventional one. These are the steps, ordered from greatest to least impact.

1. Reduce water use

• Group the plants by water need (hydrozoning) so you can close off whole irrigation zones in summer.
• Change part of the lawn — by far what uses the most water — for low-water meadows or beds of drought-resistant plants.
• Install drip irrigation with a timer and a rain sensor; add weather adjustment if you can.
• Collect the rainwater from the downpipes in a tank for watering and for the acid-loving plants.
• Mulch the whole surface: it reduces evaporation by up to 70% and keeps the root cool.

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2. Close the organic matter cycle

Nothing the garden produces should leave it in a rubbish bag:

• Compost with the kitchen scraps and the green prunings.
• Leaf mould with the autumn leaf litter, piled up separately for a year.
• Fine grass clippings left on the lawn itself (or a mulching mower or a robot).
• Thick branches shredded as mulch, or piled up in a corner as a shelter for wildlife and insects.

3. Drop the broad-spectrum pesticides

Switch to ecological control: selective products (Bt, insecticidal soap, neem) and, above all, favouring the natural predators with flowers and shelters. A garden with no broad-spectrum poisons self-regulates in 2-3 seasons, because the ladybirds, lacewings and birds come back.

4. Plant for biodiversity

• Prioritise native and Mediterranean species: they support the local insects and birds, which exotic plants don't feed.
• Make sure there are flowers all year round, especially in late winter and the depths of summer, which are the scarce times for pollinators.
• Leave a "wild" area unmown, with wildflowers and tall grass.
• Add water: a shallow drinking dish with a stone, or a small pond, multiply the garden's wildlife.
• Install nest boxes for birds and bats and an insect hotel facing south-east.

5. Reduce bare soil and intensive maintenance

• Cover the soil with ground-cover plants instead of leaving it bare to weed every week.
• Replace the single-species hedges clipped with shears with mixed, free-flowering hedges.
• Use permeable materials (gravel, block paving with open joints, wood) on the paths so the water infiltrates instead of going into the drains.

6. Consume less and better

Multiply your plants by cutting and division, swap with other gardeners, buy small plants (less plastic, less transport, better establishment) and choose durable, repairable tools. The spending approach is in budget: €100 vs €1,000.

A well-put-together sustainable garden uses half the water, generates no green waste bags and needs fewer maintenance hours than a conventional one. The effort investment is concentrated in the initial redesign; after that, it looks after itself.

Frequently asked questions

Is a sustainable garden uglier or more "wild"?

It doesn't have to be. You can combine formal structure (clipped hedges, clean lines) with sustainable criteria. The wild look is reserved for a specific area if you want.

How long does it take to transform a conventional garden?

The bulk of the change (reducing the lawn, installing drip, replanting) is done in one or two seasons. The biological balance (pests self-regulating) comes in 2-3 years.

Can I have a lawn in a sustainable garden?

Yes, but reduced to the area you actually use (play, seating) and with a drought-resistant mix and a high cutting height. The rest, beds and ground covers.

Is the rainwater tank worth it?

In a climate with rain spread out, very much: 300-1,000 litres cover a good part of the watering of pots and the veg garden. In a very dry climate, it fills up a few times a year but is still useful for the acid-loving plants.