I recently found 2 very nice (but sick) Erythrina caffra at a local nursery.
Stupidly, in the trees' sick state, I decided to repot them as the soil that they were in was like mud.
Having repotted them, I sprayed them with a fungicide to get rid of the black spot that they had.
The one is thriving (weak later), and has begun to sprout new shoots.
The other seems to be getting more "sulky" as you so nicely put it at [url]https://www.helpfulgardener.com/bonsai/03/soil.html[/url]. All the leaves have turned yellow and are starting to fall off. There is no sign of new buds.
I know the tree is decidous, and given that it is winter here, is there a chance the the tree has gone into a dormant phaze because of the shock of being repotted + being infected with and treated for black spot + winter?
Our winters are not very cold, the tempreture during the days is generally around 15(or higher)degrees Celcius and above freezing at night. I've left the tree outside, but under a shelter from the rain.
I decided to give the plant some fertilizer, to try and encourage growth. Subsequently, I've been told that fertilizing right after repotting is bad. Why is it bad?
Having said all this, what can I do to prevent this tree from dying?