Asparagus - Cultivation

Cultivation

See also: List of asparagus diseases

Since asparagus often originates in maritime habitats, it thrives in soils that are too saline for normal weeds to grow. Thus, a little salt was traditionally used to suppress weeds in beds intended for asparagus; this has the disadvantage that the soil cannot be used for anything else. Some places are better for growing asparagus than others. The fertility of the soil is a large factor. "Crowns" are planted in winter, and the first shoots appear in spring; the first pickings or "thinnings" are known as sprue asparagus. Sprue has thin stems.

A new breed of "Early Season Asparagus" that can be harvested two months earlier than usual was announced by a UK grower in early 2011. This variety does not need to lie dormant and blooms at 7 °C (45 °F) rather than the usual 9 °C (48 °F).

The blanching of white asparagus is obtained by the labor intensive hilling cultivation method, to distinguish its gastronomical qualities from those of the green plant, which is the same botanical variety.

Purple asparagus differs from its green and white counterparts, having high sugar and low fiber levels. Purple asparagus was originally developed in Italy and commercialized under the variety name "Violetto d' Albenga". Since then, breeding work has continued in countries such as the United States and New Zealand.

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