July 11, 2017
July 12, 2017
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It doesn't appear that it is a good idea to cut these much at all. According to my research, the only cutting that should be done is a dying leaf here and there.
IF you decide that you still want to cut it down, just know that there is a good chance that the plant will not recover correctly. There is still a chance that it will, like all plant can on occasion, make a miraculous recovery, but I wouldn't feel comfortable cutting them to the ground.
Fertilizing is not generally necessary.
This article has more information.