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Oplopanax japonicus is a deciduous shrub found in areas such as E. Asia - Japan. A member of the Araceae family, Oplopanax japonicus (Nakai.)Nakai does not go by a known (to us) common name. The shrub can grow to a height of 3 meters and up to meters wide. The preferred habitat of Moist woods, especially by streams and usually in rich soils., with LMH soil and FS moisture levels. .
The plant is a zone 6 hardy plant that has medicinal uses - the medicinal usage rating of is 1The root bark and stems are analgesic, antiphlogistic, antirheumatic, hypoglycaemic and tonic.
Oplopanax japonicus is 0 plant, whose flowers bloom typically in 6.
Known hazards of the plant: . The plant is densely armed with spikes and these spikes are irritant. Although no specific mention has been seen for this plant, it belongs to a genus where the species are usually rich in calcium oxylate, this is toxic and if consumed makes the mouth and digestive tract feel as though hundreds of needles are being stuck into it. However, calcium oxylate is easily destroyed by thoroughly cooking or drying the plant.
The plant has an edibility rating of 2Young shoots - peeled and then cooked[46, 61, 105, 106]. Only the very young shoots are used. The roots can be chewed after peeling[105, 106, 161].
Cultivation tips: Requires a cool moist soil[11, 200]. The plant prefers a position in light shade. The plant prefers dense shade and is probably best if grown in moist
woodland[1, 11]. Tolerates maritime exposure. (Rather a strange report for a plant that needs to be grown in dense shade[K]) A very hardy plant, tolerating temperatures down to at least -15°c, but the young shoots in spring can be damaged by late frosts[11, 200]. It is therefore best not grown in a frost pocket. This species used to be included in O. horridus as the Japanese form of that species, but it has recently (1991) been recognised as a distinct species. A very ornamental plant, but it is densely armed with spikes. It transplants easily and also tolerates pruning. The leaves and stems are excessively spiny.
. The plant should best be propagated by Seed - best sown in a cold frame as soon as it is ripe in the autumn. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Division of suckers in the dormant season. Root cuttings in a greenhouse in the winter.
Young shoots - peeled and then cooked[46, 61, 105, 106]. Only the very young shoots are used. The roots can be chewed after peeling[105, 106, 161].