Centaurea nigra ssp. rivularis - Garden cornflower

continental : Let’s try to keep the ground fairly damp, watering every 1-2 weeks with 1-2 glasses of water; when the weather is very harsh and the temperatures are below zero, watering can be interrupted.

alpine : Every 2-3 weeks water the soil, trying to wet it deeply; keep the ground constantly moist, although we must avoid water stagnations. Usually 0-1 glasses of water are used.

mediterranean : We suggest watering regularly with 2-3 glasses of water, trying to keep the growing substratum pretty cool and moist; if the climate is very cold we can reduce watering. 0-1 weeks should go by between irrigations.

continental : For the the Centaurea nigra ssp. rivularis let's prefer very sunny locations, directly exposed to sunrays.
The Centaurea nigra ssp. rivularis can stand the cold and can even stand prolonged freezing and very harsh temperatures; therefore it’s grown in the garden.

alpine : For a balanced development, it is best for the the Centaurea nigra ssp. rivularis to receive as many hours possible of direct sunlight.
The Centaurea nigra ssp. rivularis can stand the cold and can be grown in the garden even during the coldest months of the year.

mediterranean : Plant which needs to be exposed to direct solar rays.
The Centaurea nigra ssp. rivularis is a very rustic plant, which can stand without problems the winter cold.

Fertilization Centaurea nigra ssp. rivularis : Annual plants aren’t cultivated in the winter.