Camellia sinensis 'Tea Time' is hardy here in the UK. This is an evergreen plant which will produce tea leaves. These can be picked in spring for the purpose of making tea. Contrary to popular belief, tea plants do not require hot temperatures in order to thrive. They are perfectly suited to the UK climate and are winter-hardy once established. In addition to producing leaves that can be used in tea-making, they are also fragrant and have attractive winter flowers too. There are at least two tea-growing regions in the UK, including one in Cornwall and another in Scotland. This proves just how hardy Camellia sinensis can be.