The head should be tight and firm, and usually pointed when purchased. Some will be rounded depending on variety. Ideal heads will be slightly smaller than head lettuce. Leaves can remain fresh for up to two weeks in the vegetable crisper.
Plants are grown in a manner similar to "forced" chicory or Belgian Endive (Whitloff Chicory), as described in the Vegetable Gardening for Illinois book, page 114-115.
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