Fruit and Vegetables

Lemon diseases

Question: lemon diseases

hello the contact for a problem with my potted lemon, after a vigorous flowering in spring and some fruits ripened from last year now new fruits begin to grow but after the first weeks they tend to turn yellow and after a few days they fall. what may be the problem? I would like to clarify that the potted soil in this very hot period is always very humid, okay? thanks for your attention.

Answer: lemon diseases

Dear Marco,
lemons that do not ripen and fall early can be caused by excess watering, which stimulates the development of root rot; typically together with the fall of immature fruits, in these cases there are also leaves that turn yellow and dry, and a sickly appearance of the whole plant; lemons are native plants of Asia, cultivated for centuries in the Mediterranean basin; although they love winters with a mild climate, and without frosts, these plants do not tolerate prolonged drought, and therefore tend to water them very often; but as they fear the drought, they also fear water stagnation, and therefore, before watering, they always tend to wait for the soil to dry a little, because otherwise the roots go into asphyxiation, and a state of water stagnation is created, very harmful for these plants. When the weather is very hot, rather than leaving the plant constantly in a soil soaked with water, together with the watering, let's remember to provide the foliage of the vaporisations, in the early hours of the morning, in order to guarantee a good environmental humidity. Another reason why the unripe fruits may fall is caused by the fruit fly, which deposits its eggs in the flowers, and consequently the larvae develop in the small fruits; against this insect it is useful to practice treatments when the plants are still in bloom. But the reasons for the fall of the small fruit can also be other, and not necessarily linked to diseases; lemons tend to bloom several times a year, and to produce many fruits; to be able to do it the plants must enjoy excellent health, and have plenty of energy available; if your lemon has been in the same pot for a long time, without you ever having changed the soil, or if you do not regularly supply a fertilizer, it happens that the little fruits fall, because the plant, not finding the minerals it needs, refrains from carrying them when ripe. The same happens if the spring was very cold, or if the plant is positioned in an area characterized by strong winds. I remind you that a potted lemon should be repotted every 2-3 years, replacing all the now exhausted soil with fresh and rich soil. Every 10-12 days provide, with the water of the waterings, a special fertilizer for citrus fruits, so as to guarantee the plant a regular supply of the mineral salts it needs. Basically you have to make sure that your lemon is always in perfect shape, so that it can ripen the fruit.