Scaling on Jacaranda?

[cpp gardener]

The roots look good. I would go with guttation issue. High humidity isn’t absolutely required — ours hovers around 20% or so and the Jacarandas do fine. It might actually be the reverse; high humidity and extra-moist soil.

 

[tom937828]

I have the same problem.
How often do you water it.

 

[tom937828]

Images of the tree.

 

[cpp gardener]

Water when the soil is dry about 2” down unless it is in a VERY bright situation. They normally grow in full sun and prefer as much light as possible. Expect decent growth - if a bit leggy indoors, but not much flowering. Also, being tropical, they want to be as warm as you can stand/afford. Warmth reduces guttation.