be eighteen inches wide at bottom, ten inches deep, and four feet from centre to centre, and should run north and south.  The plants are to be carefully lifted with a trowel, and placed six to nine inches apart in single or double rows, and should have water as planted, that there may be no check.  In a cold soil and a cold season the trenches may be less in depth by two or three inches with advantage.  If dry weather ensues, water must be given ungrudgingly, but earthing up should not commence until the plant has made a full and profitable growth, for the earthing pretty well stops the growth, and is but a finishing process, requiring from five to seven weeks to bring the crop to perfection.  The second lot can be put out in the same way, and other plantings may follow at discretion; but as the season advances the trenches must be less deep.

==Earthing up== is often performed in a rough way, as though the plant were made of wood instead of the most delicate tissue.  The first earthing should be done with a hand-fork, and quite loosely, to allow the heart of the plant room to expand.  The result should be a little ring of light earth scarcely pressing the outside leaves, and leaving the whole plant as free as it was before.  A fortnight or so later the earthing must be carried a stage further by means of the spade.  Chop the earth over, and lay it in heaps on each side of the plant.  Then gather a plant together with both hands, liberate one hand, and with it bring the earth to the plant half round the base, and, changing hands, pack up the earth on the other side.  Be careful not to press the soil very close; also avoid putting any crumbs into the heart of the plant; and do not earth higher than the base of the leaves.  As soon as may be necessary repeat this process, carrying the earth a stage higher; and about a week from this finish the operation.

The top of the plant must now be closed, and the earth carefully packed so high that only the very tops of the leaves are visible.  Finish to a proper slope with the spade, but do not press the plants unduly, the object being simply to obtain a final growth of the innermost leaves in darkness, but otherwise free from restraint.

==The Bed System== answers particularly well for producing a large supply of Celery with the least amount of labour.  This method of cultivation is also especially suitable for raising Celery intended to be served when boiled, or for soups.  Celery beds are made four and a half feet wide and ten inches deep, the soil which is taken out being laid up in a slope round the outside of the bed, and the bank thus formed may be planted with any quick crop, such as Dwarf Beans.  The ground will need to be heavily manured in the same manner as for the trench system.  Space the plants six inches apart in single or double lines, as may be preferred, and allow not less than twelve inches between the rows.  Water must be given to each row as planted; afterwards the surface to be