This section is from the book "A Dictionary Of Modern Gardening", by George William Johnson, David Landreth. Also available from Amazon: The Winter Harvest Handbook: Year Round Vegetable Production Using Deep Organic Techniques and Unheated Greenhouses.
Twenty-five spe-cies. The seeds should be sown irnmediately, in sandy loam and rotten dung, and kept in a green-house, as they will not require heat. When the plants are about an inch high, they may be potted singly into very small pots, and kept in a crowing state till they have formed their tubers; if suffered to die down before that period, they will never shoot again, which is the cause of many persons losing them after they have got them up from seeds. A. acu-lifolia is handy. The seeds are sown in heat in February or March, and the young plants make their appearance in about six weeks afterwards. When strong enough, they are potted singly in sixty-pots and shifted progressively into larger sizes, as they require more room; and by autumn many of them are full four feet in height. These should be kept cool, and rather dry during winter, and then planted out against a wall, where they are finally to remain. The soil for potting them in is light sandy peat and loam: and when planted out they should be also placed in a light sandy soil, two feet deep, on a perfectly dry bottom.
 
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