Hello!

I've been trying to root a thunbergia cutting for quite some time. It is in water.

It has bloomed twice but no sign of roots and now the leaves are yellowing.

Should I put some fish emulsion in? Something chemical? Watch it for a few more weeks?

Someone here had said that this vine shouldn't be rooted if the cutting taken is hollow. I think this part *was* hollow. Is that why it's not working?

Thanks in advance!