Centaurea nigra ssp. rivularis - Garden cornflower

Fertilization Centaurea nigra ssp. rivularis : Annual plants tend to wither during the autumn period, usually we fertilize regularly up until the plants are flush, otherwise watering and fertilizing is interrupted.

continental : plant which needs to be exposed to direct sunrays.
The Centaurea nigra ssp. rivularis is a rustic plant, which doesn’t tolerate the winter cold, even when the nocturnal temperatures are very low.

alpine : Let's locate the the Centaurea nigra ssp. rivularis in a very luminous place, preferably sunny.
The Centaurea nigra ssp. rivularis can stand the cold, therefore it can be grown outdoors year round.

mediterranean : These plants favour sunny exposures, where they can enjoy, even for the whole day, some direct solar rays.
Grow the The Centaurea nigra ssp. rivularis in the garden, in full ground; it can stand the cold.

continental : Let’s water every 0-1 weeks with 3-4 glasses of water, or even more often if the weather is hot and dry; we should always try to keep the ground slightly damp.

alpine : Water regularly, every 1-2 weeks, wetting the soil thoroughly by using 2-3 glasses of water and keeping it always a bit moist, although avoiding to soak it too much.

mediterranean : For a balanced development these plants need constant and abundant dampness; during this time of year it is good to water frequently, about 4-5 glasses of water at least every 0-0 weeks.