Hi
I have been searching the net for some clues about a cactus – I have no idea whether it is suffering from lack of water or too much water! It is a tall, silvery blue-grey cactus with side branches (we were told it was a ghost cactus when we bought it). It does not have large spines.It has been healthy for 2 years and we have been very careful not to over-water. However, today one of its stems is shrivelled at the bottom and has flopped over. Higher up on the stem is an area which has gone soft and brown – almost as if it has rotted. There are a few drops of sticky, milky white sap on one of the other stems. The other stems all seem fine at the moment.
I did give the cactus a little bit of water a few days ago, but not enough to drain through the holes at the bottom. I have felt the soil today and it is dry as a bone.
I am too afraid to water it as I know it is easier for a cactus to recover from under-watering, and thought I would seek advice first!
Any ideas?
Thanks!
Ruth
Ruth,
It does not seem that you are overwatering, so that is probably not what has caused the arms to rot.
You will need to treat the rotting areas right away to keep it from spreading. Cut off the dead branches, making sure there is no rot left on the remaining portions, and spray with household peroxide. You will probably need to cut out the area in the middle of the branch, and also treat it. However, before you do all this, if the plant is a Euphorbia, you will need to be careful not to get any of the milky white sap on you, as it is caustic. Can you send a photo, so we can see if it has an infection, and what type of plant it is.
Finally, how much light is it getting?
Peter
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