Macranthum Problem

This lovely tree was doing so well and all fr a sudden it started to look really unhappy, any ideas?

The leaves look nutrient depleted.

Go get yourself some liquid potassium and magnesium and mix the proper dosage with water and 20/20/20.
I have the same problem here.
That works and it is amazing for palms too.

Thanks Toucan will get some today....Lovely country you live in, spent a wonderful vacation there a few years ago, time for a re visit I think :)

Could it need more space? Is the ---erghh, the pink flowered guy in the background of the picture, taking over with its' root system?

I know what that is, the name's just gone into that mind pit that opens right before I call the name.

Nerium oleander.

No don't think space is the problem. Bought some 20/20/20 today but couldn't find any potasium/magnesiaum any alternatives?. Here in the 3rd world people don't care all that much about their gardens