Posted: 14/08/2013 at 21:01
Hi Coral Such a lovely thing to have done to remember your mum. Can understand why you don't want to lose it.
Do the 2 plants have different growing conditions? One getting more or less sun than the other? Is there any damage that you haven't noticed near the base of the sickly one? How big is it? Could you dig it up to check roots?
If none of the above helps you may just have a sickly plant and have to replace it