Penstemon barbatus - Beard tongue

continental : These plants shall be watered frequently to keep a constantly humid substrate. However avoid the water stagnation and decrease waterings in case of low temperatures.

alpine : Water The Penstemon barbatus very regularly, to maintain the soil always humid, but not soaked. During the coldest months water only if the soil dries out completely.

mediterranean : Waterings will be very regular, giving a good amount of water, to allow the soil to be constantly humid, avoiding to drench it completely. Decrease waterings in the cost season.

continental : It is advisable to grow this plant in a very sunny place.
Remind that The Penstemon barbatus can tolerate without any problem slight frosts; in particularly rigid winters cover the aerial part with frost cloth.

alpine : It is advisable to grow this plant to direct sunlight all year long.
We suggest to place these plants in a sheltered location in winter: even thought they tolerate temperatures close to -5°C they do not tolerate intense frosts.

mediterranean : It is advisable to grow these plants in a very sunny location.
These plants are rather rustic and normally do not have problems also in case of frosts during winter; in case of particularly rigid winters it is possible to cover the aerial part with frost cloth.

Fertilize Penstemon barbatus : Shrubs fertilizing is given at the end of winter and at the end of summer, by burying at the base of the trunk a granular fertilizer or preferably a ripe organic fertilizer.