Gentiana (Gentian)

Eustoma grandiflorum (Tulip Gentian or Texas Bluebell)

50 (65)cm, Tulip Gentian or Texas Bluebell is an annual to short lived perennial which makes dense clumps with utmost showy , rich lavender blue flower cups above glaucous leaves. For any rich, well drained soil in a sunny spot. Best grown as a biannual. Seeds from a certified wild collection in Fremont County, Colorado, USA at some 1550m. IV-VI.

Gentiana acaulis (Trumpet Gentian)

5 (10)cm, Trumpet Gentian is a ground covering, utmost showy gentian forming mats of glossy ovoid leaves and very large, almost stemless, brilliant blue flowers in spring. Native of chalky meadows of the Alps at up to 2.000m. For any rich, well drained soil in full sun. Leave plants undisturbed. IV-V.

Gentiana andrewsii (Bottle Gentian)

40 (70)cm, Bottle Gentian is a perennial, autumn flowering Gentian with numerous bright blue flowers on tall, upright and not branching stems. Native of E North Dakota, Saskatchewan to Quebec (Canada), southward to Georgia and Arkansas (USA) growing in prairies and open spots in woods. For any humus rich, well drained soil, in a sunny to partially shaded spot. IX-X.

Gentiana angustifolia (Narrow-leafed Gentian)

5 (10)cm, Narrow-leafed Gentian is native of the Alps and has a similar habit as Gentiana acaulis. It makes dense carpet of small narrow leaves and quite large, rich blue flowers in spring. For any rich, well drained soil in full sun. Leave plants undisturbed. IV-V.

Gentiana crassicaulis

25 (40)cm, a rarely cultivated Chinese species with prostrate stems and rather broad and long leaves. The pale blue flowers are born in terminal dense clusters. Native of mountain meadows and open spots in woods in from Guizhou to Sichuan, Xizang, and Yunnan. It is easily grown in any humus rich, well drained soil in a sunny to partially shaded spot. VI-VIII.

Gentiana crinita (Fringed Gentian)

20cm, Fringed Gentian syn. Gentianopsis crinita is a biannual species with medium tall stalks crowned by rich blue flower trumpets above narrow leaves. It is native of meadows and prairies in eastern North America. For any humus rich, well drained, always slightly moist soil in a sunny spot. VIII-IX.

Gentiana cruciata ssp. cruciata

40cm, densely leaved, arching stems with intense blue flowers. Subspecies with larger and more open flower cups. For full sun, very easy. VI-VII.

Gentiana cruciata ssp. phlogifolia

40cm, densely leaved, arching stems with light blue flowers. Subspecies with smaller flower cups, whitish inside. For full sun, easy. VI-VII.

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Gentiana dahurica var. dahurica (Dahurian Gentian)

100cm, Dahurian Gentian is a semi-sprawling perennial Gentian with long, lanceolate leaves on branching stems. Rich blue to sky blue (in this form) tubular flowers (in the var. dahurica) with cream white throats, all in a dense terminal cluster. Native of mountain meadows in Mongolia and W China (NW Sichuan). For any rich, well drained soil in a sunny spot. Excellent in the rock garden. VI-VIII.

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Gentiana decumbens

20 (35)cm, upright growing Gentiana with brilliant sky blue flowers in VII-VIII.

Gentiana flavida (Cream Gentian)

15 (25)cm, Cream Gentian is a threatened perennial species from Northeastern North America. It makes dense terminal clusters of creamy-white flowers above yellowish-green leaves. Easily cultivated in any rich, well drained soil in full sun. Excellent in the rock garden. VI-VII.

Gentiana freyniana

Gentiana gracilipes

20 (35)cm, a rarely seen perennial species with dense terminal clusters of bright blue flowers with a white throat on arching stems with lanceolate leaves. Easily cultivated in any rich, well drained soil in full sun. Excellent in the rock garden. VI-VII.

Gentiana grossheimii

Gentiana kurroo (Indian Gentian)

25cm, Indian Gentian is a Himalayan herbaceous species, which has become rare due to over collection for medical purposes. It has a terminal cluster of rich ink-blue to rarely white flowers on arching stems. For any humus rich, well drained soil in a sunny spot. VI-VII.

Gentiana lutea (Yellow Gentian)

100 (180)cm, Yellow Gentian is the tallest species in its genus and the only one with bright yellow large trumpet shaped flowers in clustered whorls. From subalpine hey-meadows in the Alps. Naturally needs at least 5 years to develop the first inflorescence. VI-VIII.

Gentiana makinoi

Gentiana procera (Lesser Fringed Gentian)

20cm, Lesser Fringed Gentian syn. Gentianopsis virgata ssp. virgata is a dwarf biannual to short lived perennial with rich blue flower trumpets above narrow leaves. It is native of wet meadows in north-eastern North America. For any humus rich, well drained, always slightly moist soil in a sunny spot. VI-VII.

Gentiana puberulenta (Downy Gentian)

20cm, Downy Gentian is a dwarf perennial with several quite large rich blue flower trumpets above narrow leaves. It is native of meadows and prairies in eastern North America. For any humus rich, well drained soil in a sunny spot. VI-VII.

Gentiana quinquefolia (Stiff Gentian)

15 (40)cm, Stiff Gentian or Agueweed has pale blue to lilac blue narrow flowers on upright stalks. This perennial is native of moist soils in mountain slopes and fields of W Minnesota to E Maine, southward to Georgia and Arkansas (USA). For any humus rich, well drained soil, in a sunny to partially shaded spot. VIII-X.

Gentiana septemfida

15 (25)cm, excellent plant for the rock garden with leafy stems, turning upright before deep blue, bell shaped flowers with paler spots will open in VI-VIII.

Gentiana septemfida var. lagodechiana

10 (15)cm, is a perennial species with numerous bright blue flowers with a greenish-white throat on arching stems. Native of montane meadows in the Lagodeki valley area in the Caucasus. Easily cultivated in any rich, well drained soil in full sun. Excellent in the rock garden. VI-VII.

Gentiana straminea

20 (35)cm, is a perennial species with a dense terminal clusters of snow white flowers on arching stems with broadly lanceolate leaves. Native of subalpine meadows in Western China. Easily cultivated in any rich, well drained soil in a sunny spot. Excellent in the rock garden. VIII-IX.

Gentiana tibetica (Tibetian Gentian)

70cm, Tibetian Gentian is a broad leafed, short-stemmed perennial Gentian from S Tibet, Bhutan, Sikkim, and Nepal. Makes decorative terminal, dense cluster of cream white tubular flowers. For any rich, slightly acidic, sandy, loamy soil in full sun. Excellent in a slightly moist spot in the rock garden. VI-VIII.

Gentiana triflora var. montana