Hi Andre,
I find this information pretty exhaustive in regards to
Aloes Barbadensis. Hopefully this helps.

http://www.ehow.com/aloe-vera-plants/

Jordan

On Mon, 23 Jul 2012 17:42:00 +0200, André de Jager
wrote:

Hi
A friend of mine have a problem with his Aloes. Thy look like thy are
rotting from the crown. We have had a lot of rain the past weeks, but
the soil is very sandy. it is also very cold. He lives in Durbanville
Western Cape SA.
Could you give advice please.

Thanking you in advance
Andre'