Grew mine in pots on the kitchen windowsill...worked a treat as I just kept cutting it as I needed it
 I think that is the screret with corriander  outside .. keep it below 15 inches , chop itdown to a couple of inches  and thick mulch it over winter. 
 Our corriander went the full two years of biennial growth before it seeded whilst we we away on holiday .. I kept a couple of the plants and took some of the seed for this years plants , the rest got milled for ground corriander .