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Carnivorous Plants/cold hardy drosera?


 I live in northern California, zone 9a (20 to 25). i have a bog garden that needs a few more cps. i was  just wondering which drosera species would do best? The soil media is 50/50 peat and perlite, i use distilled water or water filtered through a zero-water dispenser. The bog gets approximately 7 to 9 hours of full sun.

Hello Nathaniel,

You might want to try out Drosera filiformis, particularly the "All Red" variety as it is a temperate species that does not need dormancy, but can handle cold weather and go dormant if needed.

You might also look into Drosera capensis. D. capensis is technically a sub-tropical that can handle light frosts and regrow from roots after dying back in cold weather.

The main consideration would be with D. capensis as it does prefer cooler weather, generally below 80, however; is a very resilient plant that can and will tolerate higher temperatures into the 90s well enough. In warm windy conditions it will suffer from brown tip on its leaves, so protect it from wind and it should be fine.

You can also try another sub-tropical, Drosera binata, that can also go dormant and handle some cold weather.

Since you are in zone 9a, you will want to consider warmth in summer, the potential of not having a consistently cold winter, and having plants that can handle the changes without difficulty. The ones above do not need dormancy, but can handle cold and go dormant if needed without trouble.

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Christopher Littrell


I am capable of answering questions about the most common carnivorous plants found in cultivation. I have no personal experience with Byblis, Drosophyllum, Aldrovanda, and Heliamphora. I have not cultivated gemmae forming pygmy sundews nor tuberous sundews. For information regarding those aforementioned species, I would suggest contacting other experts. I can answer questions regarding most species of Nepenthes, tropical and temperate Drosera, Mexican Pinguicula, Sarracenias, and Dionaea. I have some limited experience with growing Utricularia, Cephalotus, and Darlingtonia.


I have grown carnivorous plants off and on for about 27 years. I have made the same mistakes and suffered the same mishaps that many growers make as they attempt to separate the myths from the realities of growing these plants. Currently, I am successfully growing a variety of tropical sundews, a Nepenthes, several Venus Flytraps of varying ages, and Sarracenias. I have been successful in stratifying Sarracenia seeds and providing artificial dormancy requirements for my temperate plants when needed.

I hold a Master's degree in Educational Psychology. Over my lifetime, I have constantly read books involving the growing conditions of carnivorous plants. I hope to incorporate the educational aspects involved in psychology with teaching other people how to cultivate carnivorous plants.

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