I like the articleGeneralities Primrose
The Primrose is medium in size and 30 cm in height; in the spring, summer, autumn, winter it assumes a blue colouring. These plants aren't evergreens, which means they lose their leaves some months during the year. These plants grow covering the whole land at their disposal. The Primrose is a perennial herb plant. Fertilization Primrose
We suggest adding to the irrigation water, in the spring, every 20-25 days, a specific fertilizer for flowering plants. We can also mix to the soil near the plants a granular slow release fertilizer, which has a 3-4 month action. Exposure Primrose
The Primrose should be grown outdoors; it can bear very harsh temperatures without any problems, even many degrees below zero. The Primrose should be grown in a bright place, with direct sunlight.These plants lose the aerial part during the coldest months of the year. As spring begins, stems and leaves quickly start to reproduce. Watering Primrose
Water rarely, about once every 1-2 weeks with 2-3 glasses of water , keeping the soil dry for a few days before watering again; when wetting we suggest avoiding surpluses, however to wet the soil deep down. Perennial plants are subject to some months of vegetational rest. During these months it isn't necessary to water them. Treatments Primrose
Generally during this time of year we suggest a pre-emptive treatment with wide range insecticide and with a systemic fungicide, to prevent the attack from part of the aphids and the development of fungus diseases, often favoured by a mild and damp climate. Soil Primrose
We suggest a substratum characterized by an excellent drainage.
When wanted we can grow these plants in a vase. The indications given in this article are related to a medium size plant.