Without going into terminology, an alpine hill (or rock garden) is a kind of complex of mountain plants (characterized by their bright appearance and compactness) and stones, although this definition is more consistent with the concept of “rockery”, which implies planting non-mountain plants on an inclined surface of a hill or terraces. In everyday life, it is still customary to call structures on any hill precisely by the mountaineering, despite the use of ordinary (non-mountain) plants in the composition.
At the first stage of the creation of the mountaineering, it is necessary to acquire a garden plan, since the slide occupies a large space and is part of the composition of the entire site. In the case of the correct planning of the garden, you already have a plan, if not, then you need a piece of paper and roulette, and it is not necessary to have any drawing skills. It is enough to imagine how high your hill will be, and what space it will take among other objects of the garden, as well as the number of plants that you plan to plant on it.
The second stage will be a thorough selection of stones for the hill, the main criterion of which is the strength of the mount. Far from everything that is at your fingertips, you can use, all kinds of slabs, blocks, etc., are suitable here, something that will not deform and roll under the pressure of snow and rain streams. It is not recommended to use rounded pebbles, as it may be difficult to secure them. As a drainage layer, it is better to use crushed stone, sand, expanded clay. Materials containing chalk and limestone should not be preferred, since the substances contained in them (namely alkali and salt) are harmful to plants.
It is good to use compost as soil, to which you can add a little sand (depending on the type of plants). As for the plants themselves, here you can give free rein to your imagination.