![]() Studies have used four forms of cinnamon dry powder, aqueous (ie water) extraction, alcohol extraction and commercial essential oil. One study did compare the essential oils of several species and found that all of them had some antifungal properties, but some were much more effective than others. I even found one study that used a species that is not commonly used to make commercial cinnamon. ![]() Several studies do not specify the name of the species tested and in most cases only a single species was used. Unfortunately, for several reasons we can’t conclude from these studies that cinnamon, as used by gardeners, controls damping-off. At least one of the active antifungal components, cinnamaldehyde, has been well studied and there is some understanding about how it controls fungi at a chemical level. The antifungal and antimicrobial properties of cinnamon have been studied and confirmed. Which cinnamon stops damping-off? Since most reports from the general public just say cinnamon, we don’t really know which one they used. ![]() This latter one is much more expensive, and it is usually labeled correctly to justify the higher price. We do not distinguish between them, unless it is the true Ceylon cinnamon. The problem we have is that, in North America at least, almost all types are just called cinnamon. There are more fake cinnamons.Ĭinnamon is also produced from an unrelated species, Canella winterana. I’ll go with The Plant List and call it C. These last two plants are the same species and scientists have not agreed on which is the correct name. ![]() Cassia is a common name used to refer to Cinnamomum aromaticum and Cinnamonum cassia. The fake cinnamon is usually called cassia or Chinese and many sites make it sound as if cassia is a completely different type of plant. ![]()
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