The juice of the stems is antipyretic, antitussive, expectorant and sedative. It is taken internally in the treatment of lung infections with cough and phlegm. The sap is pressed from young stems in the summer and then dried for later use. The epidermis of the stem bark is antiemetic and sedative. It is used internally in the treatment of vomiting, nosebleeds, coughs etc. The epidermis is collected from young stems in the summer and is dried for later use.The root is astringent, antipyretic, depurative, diuretic and styptic. It has been used in the treatment of rabies. A decoction is also used in the treatment of high fevers and nocturnal fretfulness in infants. The roots are harvested in the winter and dried for later use.
Division in spring as new growth commences. Divisions from the open ground do not transplant well, so will need careful treatment and nurturing under cover in pots until at least late spring. Division is best carried out in wet weather and small divisions will establish better than large clumps. Another report says that you can take large divisions from established clumps and transfer them straight to their permanent positions, misting or drenching them frequently until they are established.Basal cane cuttings in spring.
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A very hardy plant, tolerating temperatures down to at least -7°c, but it dislikes prolonged exposure to hard frosts. A very ornamental plant, this form of P. nigra is often grown for food and ornament. This species is notably resistant to honey fungus. Plants only flower at intervals of many years. When they do come into flower most of the plants energies are directed into producing seed and consequently the plant is severely weakened. They sometimes die after flowering, but if left alone they will usually recover though they will look very poorly for a few years. If fed with artificial NPK fertilizers at this time the plants are more likely to die. This is a good companion species to grow in a woodland because the plants are shallow rooted and do not compete with deep rooted trees. The plant has a running rootstock, though not aggressively so in the cooler climate of Britain. and it produces new shoots from May. Dead stems can be removed at any time of the year. It is also possible to thin the clumps in spring, leaving only the strongest stems and thus creating an open grove-like effect.Cultivated for its edible young shoots in China. This species has been widely planted for ornament in the Mediterranean and is becoming established.
Problems, pests & diseases
Associations & Interactions
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Polycultures & Guilds
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