Usually during the coldest periods of the year the aerial part of these plants dries; it will begin to develop again the spring after. The Evening-primrose plant can be grown in the garden throughout the whole year. It doesn't fear cold weather and it bears very harsh minimum temperatures.For a balanced development, it is best to position the the Evening-primrose in a place where it is exposed to at least a few hours of direct sunlight.
Generally during the period of vegetatational rest it isn't necessary to water our perennial plants, which in many cases lose their aerial part. We suggest watering these plants only from time to time, but we must remember to wet the soil deeply using 2-3 glasses of water every 1-2 weeks .
In the spring let’s remember to fertilize our perennial plants, using a slow release granular fertilizer, to add in one solution every 3-4 months. If desired we can also use a liquid fertilizer for flowering plants, to mix with the irrigation water every 20-25 days.
We suggest watering these plants only from time to time, but we must remember to wet the soil deeply using 2-3 glasses of water every 1-2 weeks . Generally during the period of vegetatational rest it isn't necessary to water our perennial plants, which in many cases lose their aerial part.
The spring weather, with a high temperature swing between the day and night hours, and pretty frequent rains, can favour the development of fungus diseases, which should be treated pre-emptively with a systemic fungicide, to use before the gems grow excessively; at the end of the winter we also suggest a wide range insecticide to prevent the attack of aphids and cochineals. We should always remember to do these treatments when there aren't flowerings in the garden.
Grow these perennial plants in a very well drained substratum.
Seeing the quite contained development it’s possible to grow these plants in a container. The indications given in this article are related to a medium size plant.