You can plant Autumn Garlic now and it is a very easy crop to grow indicated by the Green wheelbarrow : Garlic planted in the Autumn has the benefit of cold months which is said to improve the bulb formation and a longer growing season. If your plot is on the wet side, or particularly cold or exposed, you may find it better to plant Autumn Garlic under glass or in a greenhouse.
Tips and hints about growing Autumn Garlic
Types of Garlic suitable for Autumn planting are ‘Lautrec Wight’: but note it is not suitable for heavy soils or very cold plots, 'Early Wight’ and Elephant garlic, which garlic which produces a smaller number of large cloves of mild flavour. It is suitable for Autumn planting as it needs a long and warm growing season and is not suited to cold wet conditions. Garlic Bella Italiano, a hard neck variety is suitable for Autumn planting and Garlic Provence Wight.
There are good number of Garlic bulbs now sold as suitable for planting at this time of year, but more important is whether your veg plot is suitable for autumn plant. If it is too wet or too cold better, to plant into containers or leave to the spring.