It's not very easy to find in shops, but if you have a garden it's very easy to grow and you can buy a packet of seed for for about �1.99. If you can find a garden centre which is selling it, it's not too late to sow a few seeds in a sunny spot while the soil is still warm. Once established it can often survive through a mild winter. I grow it and during winter cover a few heads with alarge square 5 litre mineral water bottles with the bottoms cut off, which make admirable individual cloches.