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in brief

Saxifraga belongs to Saxifragaceae, where it is places among other genus as for example Bergenia, Astilbe, Heuchera and Rodgersia.
In the genus Saxifraga there are 300 to 400 species and an unnamed numbers of hybrids.
The name Saxifraga is compound of the Latin saxum, which means stone, and frangere, which means to break.
The name of the plant refer to the place where it grows, which is narrow rock clefts and crevices, and it gives an illusion of that the plant splits the rock.
It's a wonderful plant for the rock garden, not only because of the fine hillocks, but also because it, depending on weather, start blooming as early as in February of Marts.

Saxifraga grows in cool mountain areas in Europe, Himalaya, China, N. America, N. Africa and in the Andes.
Plants who grows in mountains are normally  cowered with snow through the winter, why they can have a little problems with our wet winter, where it changes between frost and thaw. Eventually you can cower with a plate to get the worse moisture away.
The genus includes a lot of different plants. Some are quick growing and has big vigorous, green leaves and big flowers, while others are very slowly growing and has small grey-green succulent looking leaves.
The small plants can have hard rosettes or mossy leaves.
Our interest especially gather to the small hard hillocks-made plants, the so called Porphyrion.

The following description only treats the Porphyrion (but there are other Saxifraga who likes the same conditions).
The plants in this group, have small leaves, and they makes hard rosettes, which by the time again makes hillocks as hard as stone.
The leaves margin often are filled with grey or white lime tooth.
The flowers are often big in proportion to the size of the rosettes. The flowers are white, yellow, peach, orange or different shades of red, from pink to strong red.
Saxifraga grows in barren soil on limestone, with a good drainage (scree is fine)) and on the north site of a stone, so they are a little protected from the strong  sun.
The more barren soil the harder rosette.
Propagation by dividing or by seed.

Saxifraga x Bohemia

Saxifraga iranica

Saxifraga poluanglica 'Your Friend'

Saxifraga 'Antonio Vivaldi'

Saxifraga 'Allendale Bonny'