A couple of weeks ago I bought a dwarf coconut (Cocos nucifera) seedling from a nursery, all its leaves were quite green. But now, after some time on the ground, all the leaves are dead brown, only the younger leaves (closest to the apical meristem) retain a bit of green.
What am I doing? Too much water, too little water? Too much sun, too little sun?
Unlike this question I live in Brisbane, Australia, we're just entering the spring (cold nights are just around 10 to 15°C during the winter months) and there's plenty of light: the photos above were taken early in the morning, but from 10am on there's full sun light in that spot.