Ordinary summer heat for the fruiting plants 96°.
In Holland and Flanders, at the present day, the Pine Apple is never grown in any other manner than in pits and hot-beds. The crowns and suckers are struck and forwarded, from three to six, or nine months, in hot-beds, and afterwards removed to pits. These pits differ from ours in being rather steeper in the roof, and generally the fruiting pits have a passage at the back, with a flue against the back wall, and an entrance door to the passage at one end. In some the passage and flue are in front, and in others a passage and flue are conducted round the house, leaving the pit in the middle; but this is rather an uncommon form, and chiefly to be met with in pits or stoves for ornamental plants. The fuel in general use is peat, and the glass is well covered with boards and matting or canvas or thatch every night after sun-set, excepting in the warmest part of the season.
The soil used by the Dutch is good garden earth, mixed with a third part of well-rotten hot-bed dung, or cow dung, and a sufficient quantity of sand to render it free and pervious to moisture. The gardeners there are by no means so particular in the article of soil, as many are in this country; their object seems to be to make it rich and free; without being very anxious as to employing virgin soil only, or any particular kind of dung. They generally, however, keep the mixture some time in heaps, and turn it over once or twice before using it. At the same time we have seen them shifting Pines, and using a black rich earth newly dug out of an adjoining plot of turnips; only mixing it with a little rotten dung and white sand.
They shift their plants in spring, and refresh the surfaces of the pots in autumn, and they seem on the whole to fruit them in larger pots than we do; but they leave off shifting them nine or ten months before the fruit is expected to appear, wishing to have the pots filled with roots at this crisis. They seldom fruit a crown plant under two years, and more generally three, from the time it is taken from the fruit; large suckers they fruit earlier, according to their size when taken off the mother plant; some which come out from near the bottom of the stem they earth up, and do not take off at all. These come early into fruit, but it is not large.