Gentianella diemensis
Gentianella diemensis
Safety & Hazards
None known
Cultivation Details
We have almost no information on this species and do not know if it will be hardy in Britain. The following notes are based on the general needs of the genus. In general, gentians require a moist well-drained soil in a sheltered position, a certain minimum of atmospheric humidity, high light intensity but a site where temperatures are not too high[1]. They are therefore more difficult to grow in areas with hot summers and in such a region they appreciate some protection from the strongest sunlight[2, 1]. Most species will grow well in the rock garden[2]. A moisture loving plant, preferring to grow with full exposure to the sun but with plenty of underground moisture in the summer, it grows better in the north and west of Britain[3]. Plants are intolerant of root disturbance[2].
Propagation
Seed - best sown as soon as it is ripe in a light position in a cold frame[2]. It can also be sown in late winter or early spring but the seed germinates best if given a period of cold stratification and quickly loses viability when stored, with older seed germinating slowly and erratically[2, 1]. It is advantageous to keep the seed at about 10°c for a few days after sowing, to enable the seed to imbibe moisture[1]. Following this with a period of at least 5 - 6 weeks with temperatures falling to between 0 and -5°c will usually produce reasonable germination[1]. It is best to use clay pots, since plastic ones do not drain so freely and the moister conditions encourage the growth of moss, which will prevent germination of the seed[1]. The seed should be surface-sown, or only covered with a very light dressing of compost. The seed requires dark for germination, so the pots should be covered with something like newspaper or be kept in the dark[1]. Pot up the seedlings into individual pots as soon as they are large enough to handle and grow on in light shade in the greenhouse for at least their first winter. The seedlings grow on very slowly, taking 2 - 7 years to reach flowering size[1]. When the plants are of sufficient size, place them out into their permanent positions in late spring or early summer. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Gentianella+diemensis>
Pollinators
Bumblebees, butterFlies
References
- [1]Gentians. — Köhlein. F. · Christopher Helm. London. · 1991 · ISBN 0-88192-192-0 ↩︎A nice readable book, giving details of habitats and cultural needs for many of the members of this genus, with brief notes on other genera in the family.
- [2]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · MacMillan Press · 1992 · ISBN 0-333-47494-5 ↩︎Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
- [3]RHS Dictionary of Plants plus Supplement. 1956 — F. Chittendon. · Oxford University Press · 1951 · ISBN - ↩︎Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [ 200 ]).
- [4]Flora of the Sydney Region — Carolin. R. & Tindale. M. · Reed. Australia. · 1993 · ISBN 0730104001 ↩︎Concise flora with little beyond an extensive key, species descriptions, very brief habitat description.
- [5]Flora of Victoria. — Ewart. A. J. · University Press; Melbourne · 1930 ↩︎A flora of eastern Australia, it is rather short on information that is useful to the plant project.