This section is from the book "The Gardener V1", 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.
Eupatorium riparium is a good early spring-blooming plant. E. glaucophyllum is also most useful, but the best and most generally effective of all the kinds is E. grandiflorum, a robust large-leaved species, which, if struck from cuttings early, and planted out in a sunny border in June, will now give plants 2 feet high, and as much in diameter, its slightly drooping branches being clothed with snowy clusters of flowers. We used to plunge these plants, Solanums, Marguerites, and Salvias, out in their pots, but now find planting out cuttings a better plan. Towards the end of September we cut round each plant pretty closely with a draining-tool to form a ball; afterwards, if the weather is hot and dry, we water freely, and in a few days new roots begin to appear around the ball. The plants are then lifted and potted up for the conservatory, and the results are most satisfactory always. F. W. B.