Little yellow cassias

I bought these from somewhere - maybe I ordered them from Daley's Nursery - I can't quite remember. There are four of them, which I grew in a pot first. Recently, I planted the two strongest looking out into the front garden. I am worried that as the roots were a bit damaged, that they might not survive. They look ok so far, if very small. The other two, still in the pot, I am still deciding where they should go. The flower looks like the one growing in Nan's garden at 31 Hickory Street, Inala, but I'm still not sure. Hopefully, they will flower again this summer, so I can check the bloom!