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Plant & Garden Varieties beginning with U  1 2 3 4 5 6  Ulmus wallichiana Prefers a fertile soil in full sun[188], but is easily grown in any soil of at least moderate quality so long as it is well drained[1]. Susceptible to 'dutch elm disease' according to one report[200], whilst a... [MORE] Umbellularia californica Requires a well-drained moisture retentive lime-free soil in a sunny position[200]. Prefers an abundant supply of moisture in the growing season[82]. Older plants are hardy to about -15°c when growing in a pos... [MORE] Umbilicus rupestris An easily grown plant, succeeding in any near neutral, gritty, moisture retentive but well-drained soil in sun or light shade[200]. Plants are often found growing on walls, even succeeding on old brick and mort... [MORE] Uncaria rhynchophylla Not known... [MORE] Uniola paniculata Prefers a moist sandy soil, tolerating some shade[200]. Tolerates maritime exposure and saline soils[200]. An invasive plant, spreading freely by means of its rhizomes[236], but it is very ornamental[200]. and... [MORE] Urginea maritima Succeeds in ordinary garden soil according to one report[1], whilst another says that it requires a very free draining gritty or sandy soil in full sun[200]. The bulbs have a summer resting period and should be... [MORE] Urospermum dalechampii Succeeds in any fertile soil in a very sunny position[233]. A very ornamental plant[233].... [MORE] Urtica angustifolia 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 the country. The following notes ar... [MORE] 1 2 3 4 5 6 Page 3 of 6 containing U Varieties |