Question
QUESTION: My 6-7 year old cordyline's leaves have turned yellow dowm the central spine and most of the remainder of the leaves have all blotched yellow. It has been in a half barrel for the past 4 years and the barrel feels to be full to the top with roots.Do i need to use either a particular feed or some form of control for pests and diseases?Thankyou.

ANSWER: Hi Colin, have you ever changed out the medium in the barrell, therin may lie you primary reason; let me know if the soil has ever been changed out, and we will take it from there. Nick

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QUESTION: No Nick the growing medium has never been changed, but i'm not sure i would be able to as it has grown to about 14feet tall.

Answer
Colin, you may be forced to take drastic measures and cut it back severely and let it regenerate new sprouts; otherwise you will need to devise a way to move that crowded rootball to another container. The problem is definitely the old medium in the container,it needs to be changed out. Nick