Centaurea nigra ssp. rivularis - Garden cornflower

continental : Water the Centaurea nigra ssp. rivularis very regularly, trying to maintain the soil always a little humid, but not soaked or with stagnating water. Remember to increase waterings during the most luxuriant vegetative period, from March until October, and to decrease watering when the cold period starts.

alpine : We remind to water the Centaurea nigra ssp. rivularis very often, specially in summer; the soil shall be maintained humid constantly, but not soaked. During the cold season we can decrease waterings, but avoid the soil to dry out completely for too long periods.

mediterranean : Water the Centaurea nigra ssp. rivularis very regularly, allowing the substrate to be constantly humid; increase waterings specially in summer, and decrease them in winter. Remember that these plants suffer from drought, specially in case of long duration drought.

continental : This plant prefers to be exposed to direct sunlight all year long.
Grow the Centaurea nigra ssp. rivularis outside all year long; it is a rustic plant.

alpine : Grow the Centaurea nigra ssp. rivularis where it can be exposed every day to direct sunlight as long as possible.
This is a very rustic plant, that is grown in the garden all year long without any problem.

mediterranean : Grow the Centaurea nigra ssp. rivularis in a very bright location, with a good exposure to direct sunlight.
These plants are very rustic and survive in the garden also in case of long intense frosts.

Fertilization Centaurea nigra ssp. rivularis : For a luxuriant grows of annual plants we suggest to mix some slow-release granular fertilizing with the soil in which they will be placed, to ensure a constant amount of mineral salts in the soil.