动态第483页 - 绿手指 - 养花技巧、花生病了怎么办、花园打理和设计

2017年10月01日

Scientific Name Escobaria minima (Baird) D. R. Hunt Common Names Nellie Cory Cactus, Nellie’s Pincushion Cactus, Birdfoot Cactus, Dwarf Cory Cactus, Least Cory Cactus Synonyms Coryphantha minima (basionym), Coryphantha nellieae, Escobaria nellieae, Mammillaria nellieae Scientific Classification Family: Cactaceae Subfamily: Cactoideae Tribe: Cacteae Genus: Escobaria[图片]Description Escobaria minima is a tiny cactus with rounded, single stems up to i inch (2,5 cm) tall and up to 0.7 inch (1.8 cm) wide. The plant is crowded with thick, corky, white spines. Flowers are pink, up to 1 inch (2.5 cm) in diameter and 0.6 inch (1.6 cm) long. It blooms in several flushes, primarily in May, but the blooming period lasts from March until June. The fruita are ovoid, green, up to 2 inches (5 cm) long.[图片]How to Grow and Care The Escobaria are very susceptible to rot and therefore require a well-drained soil, without any water excess or stagnation; it has been observed that the plants also suffer the environmental humidity, which should preferably remain very low (30-50%). Avoid watering during the winter, when the plant is dormant: watering Escobaria in cold environmental conditions will almost certainly lead to death of the plant. In the growing season the plants, whose growth is typically quite slow, like to perceive a significant temperature difference between night and day. The experienced grower knows well the difficulties of survival of this genus, certainly not one of the easiest to grow.

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2017年10月01日

Scientific Name Sansevieria trifasciata ‘Hahnii’ Common Names Bird’s Nest Sansevieria, Hahn’s Sansevieria Synonyms Sansevieria hahnii Scientific Classification Family: Asparagaceae Subfamily: Crassuloideae Genus: Sansevieria[图片]Description Sansevieria trifasciata ‘Hahnii’ is a lovely, short growing form of Sansevieria trifasciata which remains less than a foot (30 cm) high as it sends out new shoots, and spreads into a cluster of leafy funnels. It is a stemless perennial succulent plant with dark green leaves with clear horizontal bands, arranged in an attractive rosette. Sansevieria trifasciata can bloom in summer or autumn with sweetly fragrant greenish white flowers, but this cultivar rarely seems to do so.[图片]How to Grow and Care Place Sansevierias in moderately bright or filtered light. Good locations include a spot in front of a north-facing window or in front of a bright, sunny window covered by a sheer curtain. Although the plant tolerates low light, bright light brings out the colors in the leaves. However, intense light may cause the edges of the leaves to turn yellow.[图片]Allow the soil to dry completely before watering, and then water deeply until water drips through the drainage hole. Allow the pot to drain and then discard water that remains in the saucer. Never allow the soil to become soggy and never let the pot stand in water. Water sparingly throughout the winter. Like most succulent plants that store water in their leaves, Sansevieria rots quickly in excessively wet soil.[图片]Feed the plant once every three weeks throughout the summer. Use a general-purpose fertilizer for houseplants diluted to one-half the strength suggested on the container.

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2017年10月01日

Scientific Name Myrtillocactus geometrizans (Mart. ex Pfeiff.) Console Common Names Bilberry Cactus, Whortleberry Cactus, Blue Candle Synonyms Cereus geometrizans, Myrtillocactus grandiareolatus Scientific Classification Family: Cactaceae Subfamily: Cactoideae Tribe: Echinocereeae Genus: Myrtillocactus[图片]Description Myrtillocactus geometrizans is a large shrubby cactus growing up to 16.5 feet (5 m) tall, with candelabra-like branching on mature plants. It is fast growing, and is often used as grafting stock because of this. The individual stems are up to 4 inches (10 cm) diameter, with five (occasionally six) ribs, with areoles spaced up to 1.2 inches (3 cm) apart. The flowers are creamy white, up to 1 inch (2.5 cm) in diameter. The fruit is an edible dark purple berry up to 1 inch (2.5 cm) in diameter.[图片]How to Grow and Care They are semi hardy, make sure that your Myrtillocactus are not exposed to temperatures below 25°F (-4°C) or they may die, nevertheless it is a good advice never let the nighttime’s temperatures fall below 50°F (10°C). In the summer place Myrtillocactus in the sunshine (indoors or outdoors). In the winter find a cooler, light spot. That will allow it to go into next spring well-rested, which will make it more likely to flower. This easy-care plant doesn’t want a lot of water. Allow the soil to dry out before you give it another drink. Keep the soil completely dry in winter. Treat it to special cactus food once a month in the spring and summer.

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2017年10月01日

Scientific Name Pachycereus schottii ‘Big Penis Cactus’ Common Names Big Penis Cactus Synonyms Lophocereus schottii ‘Big Penis Cactus’ Scientific Classification Family: Cactaceae Subfamily: Cactoideae Tribe: Pachycereeae Genus: Pachycereus[图片]Description Pachycereus schottii ‘Big Penis Cactus’ is a controversial, monstrous cactus cultivar with variable, irregularly shaped rib-less stems. Stems are ascending, lightly pruinose, and also branch just from the base. Stems usually remain small less than 3.3 feet (1 m) tall. The stems mark quite badly with age, due to weathering and old age.[图片]How to Grow and Care These extraordinarily low-maintenance plants can basically grow untouched for decades, so there’s really not a lot you need to worry about. Obviously it’s very important that they receive adequate sun and heat, and be careful around their spines. If grown in containers, make sure that they’re being repotted and that their soil isn’t too moist. Other than that, these plants are about as simple and hands-off as it gets.[图片]Like most cacti and succulents, these plants propagate by cuttings. Sever a branch and replant in well-drained soil. Make sure as well to stand the cactus up in an empty container to let its ends heal off before you replant it; this will keep its stems shaped right, and cacti with dried ends form roots more easily after planting.

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2017年10月01日

Scientific Name Euphorbia grandicornis Goebel ex N. E. Br. Common Names Cow’s Horn, Cow’s Horn Euphorbia, Big Horn, Big Horned Euphorbia, Big Horned Spurge[图片]Synonyms Euphorbia grandicornis subsp. grandicornis Scientific Classification Family: Euphorbiaceae Subfamily: Euphorbioideae Tribe: Euphorbieae Subtribe: Euphorbiinae Genus: Euphorbia[图片]Description Euphorbia grandicornis is an upright multistemmed succulent shrub, up to 6.6 feet (2 m) tall and about the same in width. The stem is up to 4 inches (10 cm) in diameter, 3 or 4 winged, irregular, constricted in broad, twisted, with triangular segments about 6 inches (15 cm) long. Leaves are tiny, scale-like between the spines. The spines are grey or brownish, joined, forming a horny continuous ridge, up to 3 inches (7.5 cm) long. The flowers are brilliant yellow, growing just above the spines.[图片]How to Grow and Care Euphorbias are very easy to care for. They require a little pampering to become established, but once they are, they are self-sufficient. In fact, more die from too much care and watering than from neglect. Euphorbias need well-draining soil and lots of sunlight. They are not particular about soil pH, but they cannot tolerant wet soil. Unlike most succulents, Euphorbia does not handle long periods of drought well. It may need weekly watering during the summer. Water whenever the soil is dry several inches below the surface. Water deeply, but don’t let them sit in wet soil, which can cause root rot.

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2017年10月01日

Scientific Name Hylocereus undatus (Haw.) Britton & Rose Common Names Night Blooming Cereus, Pitaya, Dragon Fruit, Strawberry Pear, White-Fleshed Pitahaya, Belle of the Night, Moonlight Cactus, Queen of the Night, Red Pitaya, Honolulu Queen, Conderella Plant[图片]Synonyms Cereus undatus (basionym), Cereus tricostatus, Cereus trigonus var. guatemalensis, Hylocereus tricostatus, Hylocereus guatemalensis Scientific Classification Family: Cactaceae Subfamily: Cactoideae Tribe: Hylocereeae Genus: Hylocereus[图片]Description Hylocereus undatus is a sprawling or vining, terrestrial or epiphytic cactus. The stems are green, 3-winged, up to 16.5 feet (5 m) long and up to 3 inches (7.5 cm) wide. They climb by use of aerial roots and can reach up to 33 feet (10 m) or longer, growing on rocks and trees. Margins are horny and undulate with wings that are up to 2 inches (5 cm) wide. Spines on adult branches are 1 – 3, grayish-brown to black in color and up to 1.2 inches (3 cm) long. The scented, nocturnal flowers are greenish-yellow or whitish, rarely rose-tinged with green outer tepals and bracts, up to 14 inches (35 cm) long and up to 12 inches (30 cm) in diameter. The fruit is oblong to oval, up to 4.7 inches (12 cm) long and up to 3.5 inches (9 cm) thick.[图片]How to Grow and Care Like most cacti, Cereus are fairly low-maintenance and hardy. Make sure they receive enough water without becoming waterlogged, especially during the summer, and fertilize them for best results. If the roots have become black or overly soft, the cactus could be experiencing root rot – cut away the affected parts and replant. Like all cacti, give them lots of direct sunlight, especially during the summer.

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2017年10月01日

Scientific Name Crassula arborescens (Mill.) Willd. Common Names Silver Dollar, Silver Dollar Plant, Silver Dollar Jade, Silver Jade Plant, Chinese Jade, Tree Crassula, Beestebul, Money Plant, Round-Leaved Crassula[图片]Synonyms Cotyledon arborescens (basionym), Crassula arborescens subsp. arborescens, Cotyledon punctata, Crassula arborea, Crassula cotyledon, Crassula cotyledonifolia Scientific Classification Family: Crassulaceae Subfamily: Crassuloideae Genus: Crassula[图片]Description Crassula arborescens is a many branched succulent shrub or small tree, up to 4 feet (1.2 m) tall. It has rounded, fat, silver-gray, up to 3 inches (7.6 cm) long leaves that are often edged maroon and have reddish spots on the upper surface. The star-like flowers are pinkish white in color. How to Grow and Care Crassula are easy to grow, but they are susceptible to mealy bugs and fungal diseases. As with all succulents, overwatering is sure to be fatal, so err on the side of too dry rather than too wet. Never let your Crassula sit in water. If you water from beneath by letting the plant sit in a saucer of water, make sure to pour off any excess water after a few minutes.[图片]Repot as needed, preferably during the warm season. To repot a succulent, make sure the soil is dry before repotting, then gently remove the pot. Crassula are generally started by division, offsets or leaf cuttings. Plants can be easily propagated from a single leaf: sprout leaves by placing them into a succulent or cacti mix, then covering the dish until they sprout.

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2017年10月01日

Scientific Name Escobaria vivipara (Nutt.) Buxb. Common Names Beehive Cactus, Spinystar, Pincushion Cactus, Viviparous Foxtail Cactus[图片]Synonyms Cactus viviparus (basionym), Coryphantha vivipara Scientific Classification Family: Cactaceae Subfamily: Cactoideae Tribe: Cacteae Genus: Escobaria[图片]Description Escobaria vivipara is a small cactus, up to 6 inches (15 cm) tall, often remaining smaller and oblong or spherical. It is densely covered in a mat of star-shaped arrays of straight white spines one to two and a 0.2 inch (5 mm) long. It flowers in yellow, pink, or purple blooms, up to 2 inches (5 cm) across.[图片]How to Grow and Care The Escobaria are very susceptible to rot and therefore require a well-drained soil, without any water excess or stagnation; it has been observed that the plants also suffer the environmental humidity, which should preferably remain very low (30-50%). Avoid watering during the winter, when the plant is dormant: watering Escobaria in cold environmental conditions will almost certainly lead to death of the plant. In the growing season the plants, whose growth is typically quite slow, like to perceive a significant temperature difference between night and day. The average winter minimum temperature, in general, should not fall below 42 to 46 °F (6 to 8 °C), unless individual exceptions; adult plants can withstand frosts also very intense, but only if the temperature rises again quickly.[图片]The experienced grower knows well the difficulties of survival of this genus, certainly not one of the easiest to grow.

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2017年10月01日

Scientific Name Graptopetalum superbum (Kimnach) Acev.-Rosas Common Names Beautiful Graptopetalum Synonyms Graptopetalum pentandrum subsp. superbum Scientific Classification Family: Crassulaceae Subfamily: Sedoideae Tribe: Sedeae Subtribe: Sedinae Genus: Graptopetalum[图片]Description Graptopetalum superbum forms 5 inch (12.5 cm) wide flat open rosettes with fleshy, thick pale gray-lavender to pink colored leaves that cluster in rosettes at the end of thick stems. Old plants have been noted with stems as long as 7 feet (2.1 m) but more typically this plant remains fairly compact, especially when grown in full sun. In late winter to early spring arise up to 2 foot (60 cm) tall, open multiple-branched inflorescences holding dainty flowers with pale yellow petals with red markings on the tips, and with red sigma lobes and stamens.[图片]How to Grow and Care The rules for Graptopetalums care are similar to those for most succulents. All require lots of sun to look their best. They require gritty porous soil with excellent drainage. Water regularly over the summer months letting the soil dry out between waterings. Minimal water is required over winter. Overwatering is a cause of root rots and the plant can get several pest infestations. Fertlize once during the growing season with a balanced fertilizer diluted to ¼ strength.[图片]The Graptopetalums are generally easy to propagate, by seeds, leaf cuttings or offsets. Any rosette that breaks off has the potential to root and start a new plant. Even a leaf that drops off will root below the parent plant and produce a new rosette quickly.

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2017年10月01日

Scientific Name Crassula barbata Thunb. Common Names Bearded-leaved Crassula Synonyms Crassula barbata subsp. barbata, Crassula lettyae, Purgosea barbata[图片]Scientific Classification Family: Crassulaceae Subfamily: Crassuloideae Genus: Crassula Description Crassula barbata is a biennial or annual rosette-forming succulent, up to 1 foot (30 cm) in height when flowering, usually with one rosette with leaves spirally arranged and old ones remaining attached to stems. Leaves are up to 2 inches (5 cm) long, up to 1.6 inches (4 cm) wide, glabrous but characteristically bearded along the truncate apex with long white spreading hairs. The spikes of small, white to pinkish flowers appear in spring. The rosette will open up as the center extends to form the tall flower stem, and after flowering it will die. Fortunately the dying rosette usually produces a number of basal rosettes which can be detached and grown on to repeat the cycle.[图片]How to Grow and Care Crassula are easy to grow, but they are susceptible to mealy bugs and fungal diseases. As with all succulents, overwatering is sure to be fatal, so err on the side of too dry rather than too wet. Never let your Crassula sit in water. If you water from beneath by letting the plant sit in a saucer of water, make sure to pour off any excess water after a few minutes. Crassula are generally started by division, offsets or leaf cuttings. Plants can be easily propagated from a single leaf: sprout leaves by placing them into a succulent or cacti mix, then covering the dish until they sprout.[图片]Repot as needed, preferably during the warm season. To repot a succulent, make sure the soil is dry before repotting, then gently remove the pot. Knock away the old soil from the roots, making sure to remove any rotted or dead roots in the process. Treat any cuts with a fungicide. Place the plant in its new pot and backfill with potting soil, spreading the roots out as you repot.

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