Below the surface, and as they become crowded they should be taken up and replanted with a refreshment of the soil, at least every five or six years.
The small bulbs should be taken up in summer and replanted in autumn and early winter, according to the state of the season.
The hardier forms of this set thrive in the open border, but the smaller sorts, like Queen Ann's jonquil, are better taken up in autumn and replanted in February; they bloom freely about April or May.
The vineyards have been replanted with American stocks.
Division, or partition, is usually resorted to in the case of tufted growing plants, chiefly perennial herbs; they may be evergreen, as chamomile or thrift, or when dormant may consist only of underground crowns, as larkspur or lily-of-thevalley; but in either case the old tufted plant being dug up may be divided into separate pieces, each furnished with roots, and, when replanted, generally starting on its own account without much check.
Patens, 2 ft., which is intense azure, has tuberous roots, and may be taken up, stored away and replanted in spring like a dahlia.
They were replanted by the abbot of Fulda in the 18th century.