which belongs to Primulaceae, is one of the biggest and most distributed
genus. It's without doubt the fewest gardens, where you don't find at least
one, and often more, different species or sorts.
Primula is a very easy plant to grow, if you stick to the common species,
as for example P. vulgaris, P. veris, P. elatior a.s.o. But it's getting
worse if you try to grow the more rare species as for example P. reidii, P. muscarioides, P. capitata
a.s.o. You never know if you have these species next year.
There is about 430 species, which all grows on the northern hemisphere. And
besides that there is a lot of hybrids.
You find the biggest concentration of Primula in the Himalaya-area and the
western China, but also USA and Europe, including Denmark, are represented.
Primula divides in 8 subgenus, which again divides in 40 sections.
Most Primulas prefer a moist humus rich, fertile, neutral to acid soil
with a good drainage, but with attach importance to the moist. But there are
also Primula to the more dry soil, as well as to the more chalky soil.
The most Primula prefers shade to half shade, depending of the moist. The
more moist in the soil, the more sun the plant tolerate. Often you see the Primula laying along the ground and "sleep" on a warm summer day, but it
rise again when it gets colder and the plant get some water.
The propagation is done by dividing or by seed. At some of the species the
seeds must have frost to germinate.