Repotting Portuguese laurels

Hi folks. I bought (on Impulse) 10 potted Portuguese laurels measuring around 15 cm. I then discovered 2ft Portuguese laurels at my local tree nursery for a great price so purchased them and planted them out alone a border instead of the smaller plants purchased previously.

I'm assuming that they will soon start to outgrow their current pots and I'll have to transfer them into bigger posts. I've nowhere to plant them out right now and was hoping to grow them all as container plants with the view of planting them out into the garden next year or when they get to a decent height.

Would anyone have any advice on this please? Thank you folks

 

Thanks very much. I've got lots of compost. Some home made and some shop bought. I can use the pots the larger laurels came in

 

Thanks for that. I'll take one out of the pot on in the morning and get a proper look. Thanks for the tip ref w it winter. We are in Ireland so harsh winters are commonplace. We do have a large glass greenhouse so could keep them in there during harsh weather