Towards summer: useful tips for taking care of cacti and succulents and avoiding nasty surprises

After an almost non-existent, anomalous and ugly spring (at least here in Italy), the temperatures have risen considerably and we are heading towards summer. In some respects, the most delicate period for cacti and succulents, i.e. the transition between the end of winter and the vegetative restart, is now behind us and the next few months will be rather “quiet” for those who cultivate these plants. In fact,  the main commitments will concern watering and fertilization, since repotting should by now be completed and treatments against pests and parasites can be given when necessary and not systematically. Even in the period of full vegetation of cacti and succulents, however, there are pitfalls and there are some elements and factors of cultivation to be taken into due consideration.

We see them in detail in the following article (…).

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Identical cacti in different substrates: extraordinary results of my test and the surprise of natural gypsum

To those wondering to what extent the substrate affects the growth of cacti; for those wondering if natural gypsum (also called agricultural gypsum) can be useful in the formation of robust thorns, this article will certainly be useful. Article which is nothing but the update of a small experiment – one of the many I do with my plants – which I started in July 2020 and which gave surprising results, amazing me first. Yes, because although the test sample is limited (six plants in all) and the results are therefore to be considered indicative and far from absolute, I must confess that I did not expect such a response just over two and a half years after the start of this test. It is known that substrates can literally make the difference in the growth of cacti and that natural gypsum (at least with some species of cacti) is an exceptional element, but it is with direct evidence, with the experimental method that we can really appreciate the impact of the soil in the growth of our succulents.

In this article, therefore, we go into the details of the experiment and see, after more than two and a half years, the results I obtained, which in my opinion are remarkable. (…)

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Strange combinations of Nature: how did an onzuka end up in the pot of an old Thelocactus?

When many plants are grown in a relatively small space such as that offered by a greenhouse (however wide it can be), it can often happen to discover welcome surprises in the pots. Cacti whose flowers have been pollinated naturally by insects or self-fertile cacti, capable of doing everything by themselves, produce fruits which, once dry, split letting the seeds fall directly onto the soil at the base of the plant. This is how one can find specimens of a certain age surrounded by seedlings or small plants, in a sort of “potted” re-proposition of what commonly occurs in nature. In spite of what one might think by observing the precise procedures necessary for the reproduction of cacti, spontaneous sowing is a common phenomenon in cacti and is sometimes able to give real surprises, as has happened to me these days.

Here is a small report in the following article. (…)

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How a cactus changes depending on the type of cultivation: the difference made by soil and exposure

When they say that a picture is better than words. In this case, there are three photos, but the concept doesn’t change, and the difference between a cactus grown in a “natural” (or “wild”) way and one with a “garden-style”, based on basic notions and beliefs is quite evident. The plants I’m writing about are Ferocactus latispinus obtained from a 2012 sowing of mine. From that same planting, I’ve got at least forty plants. Over the years, I have given away some of them, but most are still with me and are growing beautifully. It’s important to point out that these are plants born from seeds contained in a single fruit (gift of a dear friend), sown the same day and grown over the years in the same conditions, i.e. in my greenhouse, in standard soil (pumice, lapilli and peat in equal parts), watered and fertilized with the same frequency. This is to say that the starting conditions, including the genetics and the grower’s hand, are the same. And yet, as you can see from the photo above, where the three plants (three at random of the twenty-five or so that I have kept for myself) are side by side, they show remarkable differences, at least to the discerning eye and the grower with a minimum of experience.

So let’s see, in this article, how and why different cultivation regimens, assumed as a whole and not just limited to the soil, affect so much the final result and really make the difference between a cactus grown and cultivated in any garden or generic nursery and a cactus grown by an enthusiast or an expert. (…)

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Marl as a substrate for cacti: is it really so good? How to use it and with which plants does it work

The use of marl as a substrate component for the cacti’s cultivation has been widespread for years, especially in Italy. Thanks to the studies and research conducted by my friend Andrea Cattabriga – grower, researcher and succulent expert at the international level. But what are we talking about, when we discuss marl? Quite simply, a greyish and highly friable rock, to the point of breaking up into flakes until it becomes powder. It’s used to create substrates for the cultivation of many cacti and some succulent plants when combined in some dosages with other materials such as quartzite, pumice, sand, gravel, lapilli, peat, field soil (clay).

In this article we explore the benefits of using marl in cactus cultivation, we see how to make a valid marl-based substrate, and we try to understand, above all, with which kinds of cacti this material can work and with which ones it should be avoided. (…)

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