Delonix regia: my plants are dying

[PlantGirl]

Anybody know what the problem might be?
1. Start with black spots at the tip and edge of the leaves at the bottom
2. Then the yellow splotches spread to the rest of the leaf
3. The leaf turns yellow
4. It falls off

After some nutrition mistakes, it got even worse.
I've tried flush the earth, but after some times, it just starts again.

I've
tried to add N, P or K, Calcium and Magnesium + micros:
N: spray or in the earth: leaves get darker and after a day yellowing goes crazy
P: not much happens
K: not much, maybe a little bite slower yellowing
Calcium + Magnesium: Yellowing freezes for 1-2 days and then starts again
Micro: spray on leaves: super dark leaves now.
Roots: dark brown roots, but seems to like to grows white ones in water (that at one point turns brown), when it's growing again.

 

[0soyoung]

The roots are blowing bubbles - scuba diving?

 

[GrimLore]

As he said, the roots need air. Preferably as it get drawn past the roots by watering. They belong in fast draining substrate for health The best simple example I can explain is Ivy. You can strike a cutting in water. Once there is white roots they must go into draining loose substrate. If left in water even for a day to long and boom - dead.

Grimmy

 

[MichaelS]

It comes from Madagascar. It is fully tropical. It needs temps of at least 18 degrees C minimum every day and up to 38 degrees C. In other words hot to very hot. It likes quite dry conditions similar to a Jacaranda but warmer. It needs full sun all day long every day. It is in the legume family so it makes it's own nitrogen. If you can't give it those things you won't succeed with it for long. It may be possible under metal halide lights but I suspect you won't get compact growth.

 

[sorce]

Welcome to Crazy!

It's the glove!

Sorce

 

[Timbo]

Mine does that...yes they don't like wet feet, I over watered my 2 year old and it dropped leaves and died. They aren't from many dry locations...look where most them are from.
Philippines, Florida, Vietnam, Hawaii...and many others. Humid heat.
If i keep them in higher humidity they do better but will still drop leaves on a dime if something isn't right.
They do OK outside in the late spring/summer even up here with decent amount of rain, but indoors with low humidity they drop branches all the time.
They handle low temps OK, I've had them out overnight around 50-55f with no trouble.
I'm going to try a dome or enclosed rack and see if they still drop stems. It's the only tropical tree i have right now that once adjusted will keep dropping/regrowing leaves.

 

[Allie0237]

I need help also my Delonix Regia is trying to die on me. I was in the hospital for a week n my husband didn't water them at all and they were dry as a bone n the leaves were dead and dying along with some limbs. Please help me! I love these guys so much!!!

 

[leatherback]

They are ok. Sun. Warmth and do not let dry out fully again. Should come back within the next 2 weeks with new leaves.

 

[Anthony]

I would suggest Tamarinds, as the Flamboyant is
not really a good Bonsai candidate.
Good Day
Anthony

 

[Forsoothe!]

Where are you? The difference in what it does this time of year in Florida or Maine is night and day.