There are not synonyms for this plant.
Sempervivum ‘Jubilee’ is a hybrid created by crossing Sempervivum stansfieldii with Sempervivum montanum.
Sempervivum ‘Jubilee’ is an evergreen, perennial hybrid belonging to the Crassulaceae botanical family. The plant is stemless and spineless and forms a rosette of 50-60 leaves. The rosette is compact and small and can reach up to 5 cm in diameter and 15 cm in height. The leaves are oblanceolate to elliptical, flat, pointed at the apex, covered with a thin layer, pale green taking on brownish red hues when exposed to the sun-light. Blooming occurs from the summer to the late autumn and the blossom are borne by stalks up to 20 cm tall. The flowers have both male and female reproductive organs; they are pale pink with purple stamens, fleshy and star-shaped. This succulent is very appreciated by collectors for its flowers and for its resistance to temperatures.
This is a slow growing plant, easy to cultivate. The plant needs a bright exposure, indirect sun-light, this will help development of flower buds. Long exposure to direct sun-light can cause burns and burnt spots. The succulent can tolerate temperatures to 45° C, and short periods of frost, but prolonged cold will damage or kill the plant. Too low temperatures can cause the stem or leaves to break due to water freezing inside the tissues. Temperatures between 10 and 15 °C allow the plants to enter vegetative rest which is essential for the flowering of the following year. Plants should not be placed inside the house where average temperatures of 20 degrees prevent vegetative rest. The perfect soil is a well-drained soil that let the water to drain away and avoid root rot. To achieve this feature, you can mix the pumice, clay and loam. The pumice should always be placed on the bottom of the pot. Remember to use a perforating pot to drain excess water. Watering can be done regularly during the vegetative period. During the vegetative period you can water the plant every 7 days with half a glass of water, checking that the soil is completely dry before watering again; in winter you should stop the watering to allow the plant to enter dormancy. Decrease the amount of water if the plant is kept indoors or if the pot is smaller than 12 cm. The plant is used to growing in poor soils, for this reason it does not need abundant fertilization, it is sufficient to fertilize once in spring and once in summer. If the pot starts to be too small for the plant you can repot the plant in a pot 2 cm wider. Repotting should be done early in the growing season with fresh new potting soil; it is usually done every 3-4 years. Be careful to red spiders and mealy bugs.
The easiest and fast method of propagation is to use cuttings. By cutting you can use the offsets during the spring. Cut an offset and then let it dry; after a few days the cut surface will dry and a callus will form, then place the cutting in a mixture of sand, soil and pumice. To increase the success of propagation you can make two or more cuttings at the same time. It is advisable to use rooting hormone at the base of the cut to energize root development. For cuttings it is recommended temperatures around 20 °C. Propagation by seed it is not recommended for this species because it is very slow. To fast the propagation, you can try to immerse the seeds in water for 1 day. Sow the seeds in a sandy loam and keep them in warm, humid conditions.
Probably of tropical origin, Sempervivum has spread and acclimated spontaneously even in temperate climates and even in mountainous areas. The name makes it evident that it is a perennial plant and, like the other Crassulaceae, very robust.
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