Oregano can be grown from seed but is usually cultivated from pot grown plants available at Nurseries.
It can be potted up at any time of the year into a 30 cm (12 inch) pot .
Remember it is a Mediterranean herb and will not tolerate being waterlogged so ensure drainage is good .
As it will thrive on neglect, you only need to feed it if the plant turns yellow or poorly looking.
It is best to give the plants shelter or cover with fleece in extremely cold winters .
As oregano is a hardy perennial it will come back each year but after a few years oregano gets quite woody and straggly, so you can either take stem cuttings or replace with fresh stock.https://www.crocodiletrading.co.uk/polytunnels/