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Plant & Garden Varieties beginning with O  5 6 7 8 9 10 11 12 13 14  Onosma bracteatum 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 should succeed outdoors in most parts of this country. The following notes a... [MORE] Onosma echioides Requires a well-drained soil in full sun[1, 187]. Prefers a deep rather rich sandy loam[1]. Best grown in a crevice in a rock garden or on a wall[1, 187]. Tolerates hot dry conditions and also drought once it i... [MORE] Onosma frutescens Requires a well-drained soil in full sun[1, 187]. Prefers a deep rather rich sandy loam[1]. Best grown in a crevice in a rock garden or on a wall[1, 187]. Tolerates hot dry conditions and also drought once it i... [MORE] Onosma hispidum 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] Ophioglossum vulgatum Prefers a moist free-draining soil[1]. Plants are hardy to about -15°c[200]. The prothalli (a small plant formed when the spore germinates) of this species form a symbiotic relationship with a mycorrhizal fun... [MORE] Ophiopogon japonicus Prefers a sandy soil[1]. Succeeds in any moderately fertile well-drained soil and also as a submerged aquatic plant, though it does not flower in such a situation[200]. Succeeds in a sunny position if the soil ... [MORE] Ophrys apifera Plants can be grown in a lawn, but the lawn must not be cut until the plants have set seed[200]. When well-suited, the plants can multiply rapidly[230]. Grows well in a sunny dry border or on a scree[230]. Orc... [MORE] Ophrys araneola Plants can be grown in a lawn, but the lawn must not be cut until the plants have set seed[200]. Orchids are, in general, shallow-rooting plants of well-drained low-fertility soils. Their symbiotic relationshi... [MORE] 5 6 7 8 9 10 11 12 13 14 Page 5 of 20 containing O Varieties |