Eryngium maritimum - Sea holly

continental : We suggest to water the Eryngium maritimum very frequently, since it prefers fresh and humid soils; during the cold season water only if necessary, however avoiding the substrate to dry out completely.

alpine : Waterings shall be very frequent from April to September, trying to maintain the soil constantly humid, however avoiding water excesses; during the rest of the year we can water them occasionally

mediterranean : It is advisable very frequent and generous waterings, to maintain the soil constantly humid. We can decrease waterings in winter.

continental : The Eryngium maritimum needs to be exposed to direct sunlight for many hours a day to have a luxuriant growth
These plants are grown outside during spring and summer without any problem; in case of frost place them in a sheltered location, or cover them with frost cloth.

alpine : The Eryngium maritimum prefer very bright locations, where they can receive direct sunlight.
It is advisable to grow these plants outside during spring and summer; since they do not tolerate the frost shelter them since the autumn, in the greenhouse or inside.

mediterranean : They bear few hours of half-darkness, but need at least few hours a day of direct sunlight.
We remind that these plants do not tolerate frost; therefore in case of frosts cover the aerial part with frost cloth.

Feed Eryngium maritimum : These plants need regular fertilizings, to be given every 15-20 days, during the vegetative period. We can also give some slow-release granular fertilizer.