Be very particular in allowing them plenty of air, especially of a night, taking care, however, to regulate this by the temperature of the weather. If there is much wind, they will of course require less air; but, at all events, it is better to give too much than otherwise, more particularly at the first ridging out, as the weather at this season being frequently subject to sudden changes, which, should it occur in the night, and the plants are too confined, or the least rankness existing in the bed, they are sure to experience material injury, which, at this time of year, it is very improbable they will ever recover; or, if with extreme difficulty, they should be brought round, they can never be expected to grow to any degree of perfection.

Stir up the bed every day for a fortnight to the depth of about nine inches, with a hand-fork, and if you discover any fire-heat, immediately give water to the part affected, that being the only effectual remedy that can be applied. Be careful in forking close to the bottom of the hills, and if you ascertain that it fires much in this place, bore several holes at the bottom of the hills, and apply plenty of water.

Have a sharp-pointed stick, about six or eight inches long, for the purpose of stirring the mould round the plants, in a similar manner to hoeing a crop in a garden. This will very much refresh the plants, and should be attended to while they are young, for at least two months the day after they have been watered.

As soon as the roots begin to be visible through the hills, add three shovels-full of unsifted mould at a time to each hill, being very careful not to mould too freely, until the beginning of February, as the plants from the middle of December to the middle of January, lie in a dormant state; consequently, too large a quantity of mould at this season, will be attended with ill effects, in stagnating the roots, and preventing the heat of the bed rising in a free and proper manner.

This being the season when plants are most exposed to injury, and are frequently lost, great care and attention is necessary for their preservation from the effects of the cold, in wrapping the linings well up, and giving a good top covering. If the weather is intense, they will require eight or nine inches covering of hay, and water only once a week.

As soon as the plants are first ridged out, have dung in for a lining, which should always be put in the front and sides first. When the dung has been put together a week, turn it, and at the end of another it will be fit for use; one load being sufficient for a three-light box. After the plants have been ridged out a fortnight, or three weeks at the farthest, it will be necessary to line the bed to the width of about two feet, and three parts as high as the bed, inclining with a slope of about six inches towards the top. When the dung has been put about half way up, tread it, and then add the remainder, beating it well down with a fork. Cover the lining with litter about three or four inches thick at the outside, and within one or two inches of the top of the box; then place a board at the top about nine inches wide, which will keep it close, and assist in drawing up the heat. Be particularly careful in stopping the inside next to the box, when you make a fresh lining, and beat it close down with the hand about two or three inches above the bottom.

When a fresh lining has been added, have the dung in readiness for the back, which will be required about a fortnight afterwards. It should be formed about two feet six inches wide, well trod down, and wrapped up in the same manner as the front, within three inches of the top of the box. Be careful that the litter is not rank; old useless hay, or litter that has been some time laying by, will be preferable. The same directions must be attended to in stopping up the inside of the box, as with the front.

As soon as the heat of the lining in any degree affects the bed, and you discover that the inside, where it has been stopped, begins to get dry, give it some water in the evening, just before covering up, for about a week or ten days, which will be the means of keeping the rankness down, and causing a sweet steam heat to rise.

As the lining settles, press it down with a spade next the box, and add more litter upon the top, which should be done every other day, observing that when you increase one lining to have the dung in readiness for the next; each lining not being calculated to last more than a month or five weeks; though the back one will not want renewing quite so often as the front. When you apply the second front lining, it will be necessary to bore the bed with a hedge-stake or mop-stick, making five holes to a three-light box; that is, one under each hill, and two under the bars: bore them straight rather better than half way up the bed, so that when the second back lining is applied, holes may be bored exactly opposite to the others. This will cause a free circulation of the heat from one lining to the other, and prove not only of great service in regulating the temperature of the bed, but of equal advantage in draining off the surplus water. Take care when you add a fresh lining, to keep the holes open.

As the linings draw the boxes down, they will require rising with boards and bricks. In order to accomplish this, it will be necessary to provide some small pieces of board, rather larger than a brick, placing one of each, with a brick, under the corners of the boxes; and, as the bed settles, increase the number of bricks. When you raise the boxes, stop up the bed with rotten moist dung, and close up the inside about two or three inches above the bottom of the box.