Problems dieffenbachia - The expert answers on the diseases of dieffenbachia





Dear Dr. Maria Giovanna Davoli, my name is Noelia,

I am writing to you this time about a problem about a plant that I bought my mother in January ... I do not know the name of the plant and I do not understand why it has the largest yellowed and damaged leaves ... In the highest part of the plant a beautiful leaf, while the leaves at the bottom are ruined ... She has never been in direct sun so I exclude the excessive and direct heat of the Sun ... maybe I should repot her ... I send her 3 photos

I still take advantage of your attention to ask you about the last plant I bought, of which I do not know the name ... I would like to kindly know what kind of plant it is and how to cure it ... I will try in any case to look for it at inside your site ... (I send you a photo).

Thank you for your time. Sincerely.



Hi Noelia,

we begin to identify the plants. In both cases it is the dieffenbachia species, only the first is the Dieffenbachia omoena while the second is the Diffenbachia picta (or spotted). I advise you to read thecrop cardvalid for both so you will have clear ideas on how to breed them.

Regarding your question about the state of the leaves of the Dieffenbachia omoena cause they can be different, since you don't tell me anything about how you grow it, I'll list them.

One cause might be too cold. Reflect for a moment on where the plant is kept and see if this may be the cause. ThereDieffenbachia it is a tropical plant that loves heat. The optimal temperatures are around 15 ° C in winter while in summer they easily reach 30 ° C.

Another cause can be watering: too much or too little. The water must be administered so that the soil always remains slightly moist (not soaked) and without ever leaving water in the saucer. How have you regulated yourselves so far? Evaluate and adjust accordingly.

Another cause can be fertilizations. How often do you do them and what kind of fertilizer do you administer? The fertilizations, as you will read in the technical sheet, now that spring has begun, must be done regularly every 15 days with complete fertilizers.

However, take one thing into account. The death of the oldest leaves (the lowest ones) is physiological and it is a completely normal fact so I would not exclude that it could be a natural fact considering that the younger leaves are fine.

I would also advise you to immediately remove the damaged leaves by cutting the petiole of the leaf close to the stem cleanly with a blade or a well cleaned and disinfected scissors, possibly over the flame and then pour in some wax or special mastics that you find from a good nurseryman to close the wound in order to prevent any parasites from penetrating inside the tissues of the plant.

If you have any doubts, write me again

Dr. M. G. Davoli

P.S. Regarding the question ofEucalyptus, the problem is very serious. These are root-knot insects, meaning that they produce galls which are the growths you see. You must contact your municipality (they have offices in charge of this) to make an inspection and take the necessary measures. It's not a problem you can handle. On the contrary, I strongly urge you to contact the Municipality as soon as possible.

Video: Winter Care of Dieffenbachia. Leaf Browning Problem. Winter Care

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