u/Due-Opportunity-8565

Hi, I’ve had this plant in a pot outside for over a year and it thrived, growing really fast, however the wind knocked it across the garden and it looked like it was dying so I planted it.
The roots are within a spongy pot shape and have not grown throughout the compost but remained in this hard, spongy shape. Does anyone know why it’s doing this and what I can do to keep it alive and let the roots spread? Does anyone know what the plant is called?
Thank you