Inter-veinal chlorosis indicates a minerals related problem such as a soil mineral deficiency.

Okay so what can I do? I've repotted it in miracle-gro potting mix

does the media you used have fert in it??

if not .....i would use a good water sol fert.. 1/4 strength ... at every watering ....

if it does.. one would suspent that it will get what it needs ...

personally.. i would get a plastic gallon milk jug... bleach it out.. mix fert with water ... and water from there ... i dont know a brit equivalent to the milk jug ...

also ... that looks like a peat heavy media designed for houseplants... of which trees arent ....which means it might hold too much water for a tree ... though i know nothing about this one ...look at a cactus mix.. thats more of the type that trees would prefer ....

but since you just repotted.... let it get over that stress before you do such again ...

will this be going outdoors???? ... if so ... and soon ... dont bother with another repot.... just let it near dry in between waterings .... and dont forget to harden it off to full sun.. when you move it out ....

is the ID confirmed????

ken

Hey ken thanks for your reply yes the soil does have feed in it and it will be outside in summer inside in winter till it's gets woody (more tree like) "I don't know the technical term so most of what I've read says around 2/3 years and I never confirmed the ID but I'm pretty sure here's the mother tree

I have a seed. How do I start out. Do I soak it or put in right in the soil in a pot?

When I germinated Erythrina humeana from Silverhill Seeds, the advice at the time was to heat a cup of water to almost boiling, and toss the seed in that. Yes...that hot. It will not sterilize the seed. Let it soak overnight. The seed will swell. Then, plant it.