Common flax (also known as linseed) is a member of the Linaceae family which includes about 150 plant species widely distributed around the world. Some of them are grown in domestic flower beds, as flax is one of the few true blue flowers. (Most "blue" flowers are really a shade of purple.)
Under the former Cronquist system of classifying the flowering plants, flax and related plants were placed in an order Linales. Modern classifications place them in the order Malpighiales.
L. usitatissimum is grown both for seed and for fibre. The seeds produce linseed oil which is one of the oldest commercial oils and which has been used for centuries as a drying oil in painting and varnishing. The use of flax seed and flax seed oil (high in omega-3 linolenic acid) as a nutritional supplement is increasing.
Flax fibres are amongst the oldest fibre crops in the world and the use of flax for the production of linen goes back 5000 years. Pictures on tombs and temple walls at Thebes depict flowering flax plants. The use of flax fibre in the manufacturing of cloth in Northern Europe dates back to pre-Roman times. In the USA flax was introduced by the Pilgrim fathers. Currently all flax produced in the USA and Canada are seed flax types for the production of linseed oil or flaxseeds for human nutrition.
Flax fibre is soft, lustrous and flexible. It is stronger than cotton fibre but less elastic. The best grades are used for linen fabrics such as damasks, lace and sheeting. Coarser grades are used for the manufacturing of twine and rope. Flax fibre is also a raw material for the high quality paper industry for the use of printed currency notes and cigarette paper.
The major fibre flax producing countries are the former USSR, Poland, France, Belgium and the Czech Republic.
Cultivating flax
From the 1881 Household Cyclopedia
The soils most suitable for flax, besides the alluvial kind, are deep friable loams, and such as contain a large proportion of vegetable matter in their composition. Strong clays do not answer well, nor soils of a gravelly or dry sandy nature. But whatever be the kind of soil, it ought neither to be in too poor nor too rich a condition, because in the latter case the flax is apt to grow too luxuriant and produce a coarse sort, and in the former case, the plant, from growing weakly, affords only a small produce.
When a crop of seed is intended to be taken, thin sowing is preferable, in order that the plants may have room to fork or spread out their leaves and to obtain air for the blossoming and filling seasons. But it is a mistake to sow thin when flax is intended to be taken, for the crop then becomes coarse, and often unproductive. From eight to ten pecks per acre [125 to 160 kg/ha] is a proper quantity in the last case; but when seed is the object, six pecks [95 kg/ha] will do very well.
