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Biennial Varieties  5 6 7 8 9 10 11 12 13 14 15  Dianthus chinensis Prefers a rich well-drained loamy neutral to alkaline soil in a sunny position[1, 238], but succeeds in most soils including dry ones[1]. A very ornamental plant[1], it is usually biennial in habit, but can be... [MORE] Digitalis purpurea Easily grown in ordinary garden soil, especially if it is rich in organic matter[1]. Prefers a light dry soil in semi-shade[17] but succeeds in full sun if the soil is moist[200]. Grows well in acid soils[17]. ... [MORE] Gentianella amarella Requires a damp humus-rich soil and should be planted in a situation approaching its native habitat[200]. An aggregate species, individual plants may show unusual features and determinations should be based on... [MORE] Gnaphalium affine We have very little information on this species but it should succeed as a spring-sown annual in Britain. The following notes are based on the general needs of the genus. Requires a well-drained soil in a sunn... [MORE] Grindelia lanceolata Succeeds in any well-drained soil in full sun[200]. Does well on dry sandy banks and in poor soils[200]. Prefers a peaty loam soil[1]. This is one of the first species to invade disturbed or denuded ground and... [MORE] Heracleum sphondylium sibiricum Succeeds in any ordinary garden soil, doing best in moist soils or deep woodland[1]. This species contains a large number of sub-species. This sub-species is said to be free of toxic substances[65]. A good b... [MORE] Isatis indigotina We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it could succeed outdoors in many parts of this country. It is cultivated as a ... [MORE] Isatis japonica We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it could succeed outdoors in many parts of this country. The following notes ar... [MORE] 5 6 7 8 9 10 11 12 13 14 15 Page 9 of 15 containing Biennial Varieties |