It is, surprisingly, one of the easiest crops for a beginner to grow outside.  The pungent scent of garlic elicits thoughts of rich Mediterranean food or spicy curries; the food of sunny climates.  It’s easy to assume that such a crop needs far more sunlight and warmth than is possible in the UK without a heated greenhouse.  In fact, garlic needs cold weather to thrive and is usually planted outdoors in October/November in order to benefit from as long a period of winter cold as possible.