Posted by: cabsy61
Posted: 25th Nov 2010
Yuccas can be so majestic when they are as big as you indicate yours is. How tall do estimate it is, i.e. as tall as your houses roof, etc? Yuccas are of a dry mediterranian or desert type plant, accustomed to impoverished soils somewhat and don't need much watering throughout the year.
I'm no expert by any means but I do enjoy my gardening; maybe it is suffering from a trace elements or iron chelate deficiency. Yellowing is a fair sign of the latter. What kind of fertilising around it have you so far carried out, do you mulch underneath it as well?
If you want more detailed advice, may I recommend you send a letter to, your friend & mine, Peter Cundall, formerly anchorman of Gardening Australia. I don't have his postal address but I do know that he has a weekly, "Earthy Wisdom" page in agricultural publication, The Weekly Times, and I make sure I don't miss a single issue; The whole issue is that good a read & I deliberately leave Peter's page until the last one I read.
I'm sure if you contacted them, They would be able to forward on your letter or give you his forwarding address.
All the best;