In Luxembourg, too, the “rock garden” is gaining popularity. More and more front yards are being transformed into gray stone deserts. This trend poses several problems; here’s why:

Significant effort and costs

To create a rock garden:

  • The layer of fertile soil must be removed
  • Weed fabric has been laid
  • A mixture of gravel and sand is spread
  • Then a decorative layer of exotic gravel is added, sometimes secured with plastic plates

These projects require a lot of labor and materials and are usually entrusted to professionals.

Tedious cleaning of the leaves and discoloration of the stones

  • Dead leaves fall onto the gravel and must be removed by hand to prevent weeds from growing.
  • The use of leaf blowers is discouraged due to noise, energy consumption, and their impact on wildlife.
  • Pollen and dust accumulate, promoting the growth of moss, algae, and lichens.
  • Over time, the stones fade and require costly restoration.

Frequent use of herbicides

  • Rock gardens aren't "weed-free."
  • As a result, some homeowners use herbicides, creating a toxic environment for residents.
  • Chemicals end up in waterways, causing ecological damage.

The soil is deteriorating

  • The weight of the gravel destroys all life in the soil.
  • If the gravel is removed, costly soil restoration will be necessary.

Few native plants

  • Rock gardens often have few or no plants.
  • We tend to favor exotic plants (bamboo, pampas grass, Chinese reeds), which provide little food for local bees and butterflies.

Global Warming

  • Mineral surfaces store and release heat, altering the microclimate around the house and contributing to the urban heat island effect.
  • Temperatures in the city can already be 2–3°C higher than in surrounding areas, and the climate crisis will make this situation even worse.

Lack of habitat for animals

  • Butterflies, chickadees, frogs, hedgehogs, and lizards can find neither food nor shelter.

Rainwater isn't draining properly

  • Depending on the waterproofing, a rock garden acts as an impermeable surface, preventing vegetation from retaining water.
  • Possible consequences: flooding, sewer backups, river pollution.

No air filtration

  • Plants filter fine particles and nitrogen oxides.
  • Without them, air quality deteriorates, affecting our respiratory health.

Aesthetics and connection with nature

  • Monotonous mineral surfaces do not change with the seasons; they offer neither colorful flowers, tasty fruits, nor a pleasant fragrance.

A natural or semi-natural garden is the exact opposite of barren gravel and rock landscapes!

  • Plants improve air quality, regulate the micro- and macroclimate, absorb urban noise, and have a proven positive effect on physical and mental well-being. This is particularly important in the context of the climate crisis.
  • Fertile soil provides shelter and food for billions of microorganisms and thousands of insects.
  • Native plants provide pollinators with pollen and nectar throughout the season.
  • Where there are many insects and worms, birds and small mammals also find food and shelter.
  • Lively, colorful natural gardens are a feast for the eyes and create a welcoming atmosphere.

Perennials are flowering plants that return each year. During the first few years after planting, you should remove unwanted weeds and other “intruders” that appear among the perennials 2 to 3 times a year. But once the perennials have reached their full size and fully occupy the space allotted to them, the “weeds” have almost disappeared. After that, simply prune the perennials once a year, preferably in the spring, so that insects can overwinter in the dead stems and birds can find food in the winter.

A wildflower meadow also requires little maintenance: once established, it only needs to be mowed once or twice a year. Here, too, it is advisable to choose native seed mixes. Some patches can remain in place all season until the following spring. Be careful, however: not all mixes are suitable for every location.

Trees, hedges, and shrubs not only shield the garden from prying eyes and intruders, but they also provide shelter and food for insects, birds, and small mammals.