Christine said:Did you re-pot her when you brought her home? The soil looks very dense to my eyes, and could be suffocating the roots. Other members will have more advice for you.
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WillC said:I advise strongly against repotting it at this time, especially since you are inexperienced and so much can go wrong if repotting is done incorrectly. There is nothing that suggests it needs a larger pot at this time.
From the photos, I see one leaf that has deteriorated. The loss of some occasional leaves is normal and not a cause for making any major
I'm sure you Dieffenbachia is reacting to its recent change in environment to your home. It is very important that you get the light just right for it. A shelf is probably not a good location because the back side of it will not get any significant light.
Find a location within a few feet of a moderately sunny window but where it is protected from the rays of the sun falling directly on the leaves. I north window is best. Make sure it is placed so the entire plant gest light and rotate it every week so all leaves get equal exposure.
Allow the top half-inch of soil to dry before watering thoroughly enough that a bit of water runs through the drain holes.
Trim off occasional older leaves as they discolor and don't worry about it. As long as new leaves come in looking healthy, then you will know you are on the right track.
BigBill said:It appears to have grown to the edge of the pot and could use repotting. Use a soil that is rich and fluffy. I love Miracle Grow potting soil. Don't use garden soil as it is too dense.
Don't go crazy with too large of a pot either. Just make sure it provides a little extra room for the existing root mass. Refrain from a larger pot expecting the plant to grow well enough to fill the new pot with new growth and new roots. Too large of a pot often leads to watering issues.
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