[Arid_gardener] cacti question

[luann torkelson]

Good morning,
   
  Our yard was landscaped in April 2006.  We have two cacti about four feet apart; each gets full sunlight all day.  Their watering schedule is on the same cycle as all shrubs:  1 hour every two days.
   
  Here is the question:  The argentine giant is all shades of yellow.  The organ pipe is beginning to get yellow on the tips and near the base.  What causes the yellowing and is 
  there anything I can do about it?  Both plants are below the knee in height.
   
  Thanks.
  Luann
   
   

       
---------------------------------
Fussy? Opinionated? Impossible to please? Perfect.  Join Yahoo!'s user panel and lay it on us.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://CALS.arizona.edu/pipermail/arid_gardener/attachments/20070701/0bf17676/attachment.html