How long does it take for recovery from septum rhinoplasty-plaster cast?

Hello, i had my septum straightened and the inner cartilage of my nose straightened too it happened 5 days ago, i had my initial 3 stitches out two days ago, and due to have my splints removed this wednesday (26th feb) I was wondering, the doctors have mentioned i might need my plaster cast on for a little longer, How much longer do you reckon it'll stay on? I am going on holiday in march and wouldn't like to have it on there!