Here comes autumn: what treatments can we do to protect succulents and reduce losses?

With the beginning of autumn almost all succulent and cacti begin to prepare for the vegetative stasis which will last until February/March. In the winter months, cacti (with some exceptions such as Melocactus, Discocactus and epiphytes such as Epiphyllum) and many succulents (with the exception of those originating from the southern hemisphere or areas such as Madagascar) stop growth and go dormant to recover energies and be able to flourish during the following season. In these months the plants should be kept cold and should not be watered. However, it is useful to carry out some preventive treatments to prevent the formation of mold or fungi during these months, thanks to the winter humidity, which, when the temperature start to rise, triggers rot. Warning: preventive treatments with chemical products can be useful but do not necessarily have to be carried out. It is simply a preventive measure, since the best form of defense is always the spartan cultivation of plants accompanied by a good exchange of air during autumn and winter. There are growers who limit these treatments to the essentials, perhaps favoring products with a low environmental impact (I myself have adopted this decision for years) and growers who abuse chemical products in the hope of thus making their plants invulnerable to animal parasites, fungi and mold.

In this article, which completes what has already been explained in other articles (which you will find thanks to the internal links) we see what is advisable to do in these weeks to protect the plants and limit losses due to rot or parasites as much as possible. (…)

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Cacti and diseases: stop anxiety, sometimes we can’t help but let Nature take its course

Let’s talk about cacti and diseases starting from a simple photo. The plant that inspired this article, and which you see above, is (or rather, was) an Ancistrocactus (=Glandulicactus) mathssonii. I had obtained this specimen with my sowing about ten years ago and fortunately eight or nine other “brothers” of this plant are still in perfect health, growing and flowering regularly. This particular plant, although treated exactly like the other specimens of that sowing and planted in the same type of substrate in which my other mathssonii live (clay, marl and 60% aggregates), a couple of years ago took a fungal pathology and within a few weeks it was dead. I think it was fusarium, but today it doesn’t matter, because the disease has run its course and what remains is… the armor of this cactus, that is a beautiful interweaving of thorns that embraces the void left by the stem which, over time, it dried up until it decomposed and disappeared altogether. The observation of what remains of this plant, which for a couple of years I have kept along a low wall not far from the greenhouse, where I usually move the diseased plants (by diseases, in this case, I mean generically pathogens and parasites) to prevent them from infecting other specimens, led me to some considerations on the cultivation and treatment of plant diseases.

Considerations that I have condensed in the following article an excerpt of which was also published in the British Cactus and Succulent Society newsletter. (…)

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