The same plants in full growth, taken a few months earlier.
Sarracenia avoid the harshness of winter in the cool temperate climate of North America by halting growth and waiting until the cold has passed. This behaviour is called dormancy. In plants, dormancy is triggered by changes to day length with the seasons, not by cold. The cold itself does not play much of a role in starting dormancy, but it can keep plants dormant once dormancy has started.
|A tray of dormant Sarracenia flava in my greenhouse. Note the traps are dying off from the cold - this photo was taken after a week of frost at the start of winter.|
Sarracenia trimmings – these were taken a little early to try and stop a mealybug infestation.
Dormancy may seem a boring time for those growing Sarracenia, but I think it is a really important stage in their growth cycle. It is when all dead and dried parts of the plant can be removed, but it can be a good idea to leave some leafy material on plants if you live in an area that gets many winter frosts. The remaining vegetation seems to act as a blanket, trapping slightly warmer air stopping the really cold air from burning the live tissue in the rhizome. Late winter is also the time to repot your plants.