Winter greens Winter greens Winter greens are green leaved vegetables, closely related to the cabbage, that are seasonably available in winter. Common vegetables described as winter greens are chard, collards, rapini, and kale. William Morgan classed Brussels sprouts, savoy cabbages and several varieties of kale as winter greens. Morgan grew these vegetables and compared their hardiness, identifying which species were most suitable for growing through cold winters. He presented his findings to the Horticultural Society of London in 1818. Late season crops "from October through December, a gardener can easily maintain and eat bok choy, pak choy (the purple pak choy is
Vegetable oils as alternative energy bio-diesel is that it can tolerate low rainfall (as little as 250 ml per year), far below what most food-crops require, thus reducing yet more their potential to compete. Some species of algae contain as much as 50% vegetable oil. Algae have very high growth rates compared to plants normally used to produce vegetable oil. Potentially algae could produce much more oil per area of land than current farming methods. So producing vegetable oil this way should result in less deforestation and less competition for food production land. One expert wrote: "As demonstrated here, microalgal biodiesel is technically feasible. It