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Plant & Garden Varieties beginning with O Page 4 of 20 containing botanical plant names begining with the letter O. 155 Varieties Listed in Total 4 5 6 7 8 9 10 11 12 13 
Olearia x haastii Succeeds in any well-drained moderately fertile soil in full sun[182, 200]. Thrives in a chalky soil[182] but prefers a light loam or peaty soil[11]. Very tolerant of maritime exposure[75, 200] and atmospheric ... [MORE] Olneya tesota 257362
This species requires an almost frost-free climate.... [MORE] Onobrychis viciifolia Prefers a well-drained neutral to alkaline sandy loam in full sun[1, 200]. Succeeds in poor soils[115] and in shallow soils over chalk[200]. Dislikes shade. Does not succeed in wet soils[115].
A good border pl... [MORE] Onoclea sensibilis Prefers a moist light soil in partial shade[187]. Requires a damp humus-rich site in partial shade with preferably only 2 - 3 hours of sun daily[200]. Plants require an abundance of water at the roots all year ... [MORE] Ononis repens Prefers a sunny position in a well-drained neutral to alkaline soil[200]. Succeeds on the tops of walls and on dry banks[200].
Similar to O. spinosa, but this species is rhizomatous[200]. It can spread rapidly... [MORE] Ononis spinosa Prefers a sunny position in a well-drained neutral to alkaline soil[200]. Succeeds in poor soils, the plant often becoming spiny in such a situation[17].
Similar to O. repens but this species is not rhizomatou... [MORE] Onopordon acanthium An easily grown plant, it succeeds in almost any ordinary garden soil[1, 111]. Requires a well-drained soil, preferrably in full sun though it tolerates light shade[200]. Prefers a slightly alkaline soil[200]. ... [MORE] Onopordon illyricum Succeeds in almost any ordinary garden soil. Requires a well-drained soil in full sun. Prefers a slightly alkaline soil.
Plants are hardy to about -15°c.
Often self-sows, sometimes to the point of nuisance, t... [MORE]
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Page 4 of 20 containing O Varieties 155 Varieties Listed in Total
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