Living most of my life in so. Caif. on a avacado and citrus ranch, I can tell buy the look that your soil may need a little help. Looks like clay I think. Your tree needs fertlizer. All the leaves look a little yellow they should be a nice med. green with some shine. Try some of those fertilizer stakes FOR CITRUS but don't over do. You can also try digging a larger watering basin area around the tree(out past the TREE drip line)with side banks around 2-3" high. Fill up the basin (hose) around the tree and see how long it takes the water to soak in. Could be not draining well. If it is draning well great, then the basin will fill up with the extra water from the drip system providing more water to the tree and you will need to water less. If it is draining badly then you will need to admin the soil. Hope some of this helps. Good luck

Hello! It is normal for the older leaves on Pachira to yellow, brown, and fall off. If the *tips* of the leaves are browning, this usually indicates over-watering. The type of soil you used will determine if the issue is over-watering. What type of soil, and how large of a container? Josh

The leaves on a tree that dies in the summer will often just turn brown and hang there. If the leaves are falling, the tree is still active metabolically. Leaf senescence is still driven by a plant's metabolic processes. Doesn't mean the tree won't die at some point...just that it's not dead yet.

Thanks Denise, John and Sunshine! Environment: north facing balcony though it's winter and the sun has dropped off. Water once a week with Seasol. Thanks for headsup re scale. How long between treatments should I leave it - just soaked it in white oil? Shot of underside of leaf that's just dropped off (down to the last three though new ones are budding through) - Mark