closeup of kale plant brassica oleracea var. sabellica l. growing in a garden in switzerland

agriculture background borecole brassica cabbage canada closeup curly curlyleaf dark diet drops farm fiber fresh freshness garden gmofree green growing gruenkohl health healthiness healthy human ingredient isolated kale krauskohl leaf leafy leaves nature oleracea organic quebec raw soil stem super swiss switzerland var vegetable vegetables vitamin white winter zurich