A DC electromagnet is simply a coil of wire connected to a DC voltage source. It can have an air core or an iron core.
Northern Highbush Varieties. High Chill Varieties. Northern Highbush varieties are the most widely planted blueberries in the world. They grow best in temperate climates where total winter chilling is 1,000 hours or more.Except where listed, most Northern Highbush varieties are relatively self-fertile.orthland is the one of the most cold-hardy Highbush varieties. It is vigorous, easy to grow and adaptable to different soil types and conditions. Northland yields are heavy and the berries are sweet with high sugar content.
Although highbush shrubs are not âtrueâ cranberry plants, they bear red fruits that are similar in look and taste to âtrueâ lowbush cranberries. The highbush cranberry is in the plant family that includes honeysuckles and the lowbush cranberry is in the plant family that includes blueberries.Both types are North American native plants, but their discrete differences attract different pests.he cranberry plant that bears this familiar fruit is a northeastern United States native. But there's another cranberry plant that gardeners cultivate in warmer climates as an ornamental shrub.