the leaves of the cabbages are as if marbled. Could you please tell me how I can fix it? thanks
Dear Paolo, welcome to the section of our website dedicated to gardening enthusiasts and their questions. From the phenomenon you described, namely an alteration of the leaves of your cabbages which are becoming marbled, it can be deduced that there is probably a lack of magnesium in the soil where you are growing. A lack of mineral salts in the soil can be easily overcome with natural fertilizers or with chemical fertilizers, in particular by adding iron and magnesium to the growing medium.