This section is from the book "The Gardener V2", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
Mr John Gibson, of Battersea Park, kindly writes in reply to your inquiry: "In reference to the propagation of Aralia Sieboldi, I am sorry I have no definite experience as to the best mode of increasing that species except from seed; but I should not hesitate to recommend a trial of increasing it from cuttings of the roots, in the absence of seed, in the same way as Aralia papyrifera is increased, cuttings of the roots of which make plants freely on a gentle bottom heat. The thick roots are cut into pieces of from 1 to 2 inches long, laid flat in pans or pots of light soil, well drained, and covered half an inch or so with the same, and then a slight covering of silver sand. Young shoots are thrown up irregularly, and as they become sufficiently strong, should be removed and potted singly in pots, and kept in a close warm frame until the roots appear round the inner side of the pot, and then gradually hardened off until they will bear a cool frame, and be shifted on as required".
 
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