Apartment plants

Suffering gardenia

Question: why is my gardenia suffering?

Hi, on April 2nd I bought a gardenia plant. I changed her small pot full of earth to make it impossible to water it. I placed pumice stones in the pumice stone and in the saucer of expanded gravel, which I keep with a little water, to create a moist environment. I keep it near the glass door and in these cold days I keep it
on the terrace (not in the sun) withdrawing it in the evening. The first few times I watered it with tap water; but since some of the leaves were beginning to yellow, I now water them with demineralized water and twice with the addition of sequestrene. The plant for now is in good condition, because the buds open, even if someone gets stained with brown and falls. However, despite my attentions, the leaves continue to turn yellow. What do you advise me to do so that the plant does not deteriorate? I await your kind reply. Thanks. Ettore.

Suffering Gardenia: Answer: cultivating gardenia

Dear Hector,
the cultivation conditions of your gardenia are optimal; unfortunately, however, these plants tend to be quite delicate, not in general, but only when they are moved from one environment to another. In the nursery the plants enjoy an ideal climate, with high environmental humidity (those who work in the nursery know well that water is everywhere) and a diffused and very high illumination. Unfortunately at home it is not possible to repeat the identical climatic conditions of the nursery, and therefore our plants (especially if they suffer from travel) take a while to get used to the new house. Generally the one that lacks the most from a plant when moving from the nursery to our home is generally the humidity of the air. Sometimes even the saucer with clay does not solve the problem, and it is necessary to vaporize the hair, about a couple of times a week, using demineralized water, because otherwise we would go to stain the leaves with limestone.
Another problem of your gardenia could be due to watering: gardenias need regular watering, and a cool, moist soil. Often, however, it is not as easy as it seems to distinguish between wet and wet. Plants in general (except for a few exceptions) do not like the fact that the soil always remains moist, soaked with water and saturated with humidity; this is because the roots, in addition to absorbing water and mineral salts, also have gaseous exchanges with the environment. IF the ground is saturated with water these exchanges cannot take place, and in practice the roots suffocate. When you water your gardenia check with a finger if the ground is still very wet; in this case the watering can be delayed even for a couple of days. When we repot the plants, we generally supply them with a good soil already prepared in the nursery, which is perfect for dough, but also already enriched with fertilizers; therefore, in the weeks just after repotting, it is advisable to avoid fertilizing further, to avoid poisoning the plant with excessive amounts of nitrogen or other minerals. Ferric chlorosis is a problem due to the lack of bioavailable iron in the soil, the plants are unable to absorb it (or because there is not, or because the calcium in the limestone prevents it from being absorbed) and are unable to produce chlorophyll, and therefore the leaves become yellow. But if your plant has been repotted, in a soil for acidophilic, even watering it every day with strongly calcareous water, it would take months before the soil changes ph and favors the onset of ferric chlorosis. So the sequestrene that you are supplying is only an excess of zeal, which with plants can however become harmful; It is as if you were taking the antibiotic, because you have planned to go between three months in a white week and the cold often causes you a sore throat.