动态第476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02日

Scientific Name Helianthus angustifolius L. [图片]Common Names Swamp Sunflower, Narrowleaf Sunflower Synonyms Helianthus angustifolius subsp. angustifolius, Helianthus angustifolius var. angustifolius, Coreopsis angustifolia, Discomela angustifolius Scientific Classification Family: Asteraceae Subfamily: Asteroideae Tribe: Heliantheae Genus: Helianthus [图片]Flower Color: Yellow Bloom Time: Early autumn Description Helianthus angustifolius is a perennial herb sometimes as much as 5 feet (1.5 m) tall. Leaves are long and narrow, up to 6 inches (15 cm) long. It is often cultivated for its bright, showy yellow flowers. One plant can produce 3 to 16 flower heads, each with 10 to 20 ray florets surrounding as least 75 disc florets. [图片]How to Grow and Care If you decide to add Sunflowers to your garden, there are a few things you will want to keep in mind. First of all, they are called sunflowers for a reason. They need sun. Make sure that the location you choose for your Sunflowers gets full sun. Second, you do not need to worry about soil too much. They are not picky about the conditions of the soil, but they are plants. They will do better in better soil. Third, Sunflower seed shells do contain a substance that is toxic to grass. So, you will need to either harvest the Sunflower heads before the seeds begin to fall out or you will need to plant your Sunflowers in a location where you do not mind any nearby grass being killed. Fourth, keep in mind the height of the Sunflower variety you have chosen. A giant, twelve foot variety will end up acting very much like a small tree and may shade the surrounding flowers. Origin Native to the south-central and eastern United States, found in all the coastal states from Texas to Long Island, and inland as far as Missouri.

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2017年10月02日

Scientific Name Haworthia attenuata (Haw.) Haw. [图片]Common Names Zebra Plant, Zebra Haworthia Synonyms Haworthia attenuata var. attenuata, Apicra attenuata, Aloe clariperla Scientific Classification Family: Xanthorrhoeaceae Subfamily: Asphodeloideae Genus: Haworthia [图片]Flower Color: White and green Bloom Time: Can be ever blooming if you snip off each bloom when it dies. Description Haworthia attenuata is a stemless clustering perennial succulent, up to 6 inches (15 cm) tall. The rosettes are 3 – 6 inches (7 – 15 cm) in diameter, with 30 – 40 dark green leaves, 3 inches (8 cm) long with white tubercles. The Inflorescence is 16 inches (40 cm) tall, white flower with green veins. [图片]How to Grow and Care Display Zebra Plant anywhere it can receive plenty of sun or bright light. South facing windows will provide the most sun, however, east or west provide direct sun part of the day that I find more suitable. During the growing season from April to September water the Zebra Plant thoroughly and then water when the soil becomes dry to the touch (not bone dry though). Winter is a tricky time for these plants although they are a tough species. Many growers will overwater then alongside cold temperatures or drafts the plant can become very sick, or even die. The leaves are storage organs so during the winter water much less and allow the top soil to dry out. Use a cactus potting mix that drains wells and provides plenty of air to the small roots. If making you own mix or buying another type, use part potting soil, part perlite and part sand. Origin Native to South Africa (Eastern Cape).

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2017年10月02日

Scientific Name Cheiridopsis denticulata (Haw.) N.E.Br. Common Names Carpet Weed, Lobster Claws[图片]Synonyms Mesembryanthemum denticulatum (basionym), Cheiridopsis candidissima, Cheiridopsis denticulata var. denticulata, Cheiridopsis inconspicua, Cheiridopsis littlewoodii, Cheiridopsis macrophylla, Cheiridopsis vanheerdei, Mesembryanthemum candidissimum, Mesembryanthemum denticulatum var. candidissimum Scientific Classification Family: Aizoaceae Genus: Cheiridopsis[图片]Description Cheiridopsis denticulata is a perennial, compact, cushion-forming succulent plant, up to 4 inches (10 cm) tall and up to 12 inches (30 cm) across. Leaves are grey-white, up to 2.6 inches (6,5 cm) long, up to 0.4 inch (1 cm) wide, simple or somewhat toothed on the keel from which its name derives. Flowers are cream to pale yellow, often violet to red at tips and outside and up to 3.2 inches (8 cm) in diameter.[图片]How to Grow and Care The basics of Mesemb care are very simple, with free-draining soil, plenty of sun and ventilation, and regular light watering in the right season. Yet the difficulties are endless, trying to adapt to the Mesembs’ own adaptability and to follow their growth habits in your particular conditions. Mesembs require a loam-based compost with the addition of extra drainage material such as horticultural grit or perlite. They all like good light conditions and plenty of ventilation.[图片]Some are relatively cold-hardy and can even survive mild winters outside. Most will survive temperatures down to freezing point. There are some Mesembs which begin to grow in the autumn as the temperature drops and the days get shorter. Because different genera within the Mesemb family have different growing conditions, care mast be taken with watering. Some genera will benefit from a light spray water to prevent shrivelling during their dormant period.

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2017年10月02日

Scientific Name Sedum lineare Thunb. Common Names Needle Stonecrop, Carpet Sedum, Linear Stonecrop Herb, Stonecrop[图片]Synonyms Sedum anhuiense, Sedum subtile Scientific Classification Family: Crassulaceae Subfamily: Sedoideae Tribe: Sedeae Subtribe: Sedinae Genus: Sedum[图片]Description Sedum lineare is a mat-forming evergreen succulent plant with bushy and semi trailing stems, up to 6 inches (15 cm) tall. The new growth on this plant is often upright and then lies down under the weight of the stems and in shade it tends to grow slightly more open and taller. The leaves are succulent, light green or pale greenish yellow, up to 1 inch (2.5 cm) long. It is in flower from Jul to August. The flowers are star-shaped, yellow and up to 0.8 inch (2 cm) wide.[图片]How to Grow and Care When growing Sedum, keep in mind that Sedum plants need very little attention or care. They will thrive in conditions that many other plants thrive in, but will do just as well in less hospitable areas. They are ideal for that part of your yard that gets too much sun or too little water to grow anything else. A common name for Sedum is Stonecrop, due to the fact that many gardeners joke that only stones need less care and live longer.[图片]Sedum is easily planted. For shorter varieties, simply laying the plant on the ground where you want it to grow is normally enough to get the Sedum plant started there. They will send out roots from wherever the stem is touching the ground and root itself. If you would like to further ensure that the plant will start there, you can add a very thin covering of soil over the plant. For taller Sedum varieties, you can break off one of the stems and push it into the ground where you would like to grow it.

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2017年10月02日

Scientific Name Titanopsis calcarea (Marloth) Schwantes Common Names Concrete Leaf, Jewel Weed, Carpet Leaf, Sheep’s Tongue, Living Stone[图片]Synonyms Titanopsis calcareum Scientific Classification Family: Aizoaceae Subfamily: Ruschioideae Genus: Titanopsis[图片]Description Titanopsis calcarea (Concrete Leaf) is a mat forming succulent with basal rosettes up to 3 inches (7.5 cm) in diameter. Fleshy leaves, up to 1 inch (2.5 cm) long with truncate tip, usually grey or blue-green, densely covered at the apex with whitish, creamy grey, ochre, red or bluish rough tubercles. Yellow to orange flowers, 0.8 inch (2 cm) in diameter.[图片]Hardiness USDA hardiness zone 9a to 11b: from 20 °F (−6.7 °C) to 50 °F (+10 °C). How to Grow and Care Titanopsis grows to form clumps. These clumps can be divided for further propagation of the plant. The maintenance of Titanopsis is not difficult. They need a sandy substrate with little organic material. They are winter grower, and should be kept relatively dry in summer. They should also be kept dry when the temperature is below 45° F (7° C).[图片]Division of larger clumps is possible in some cases, but as most species have tuberous rootstocks and offset slowly, seed production is the most common method of propagation. Sow it in spring and it should start flowering after two years.

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2017年10月02日

Scientific Name Escobaria sneedii Britton & Rose Common Names Sneed’s Pincushion, Sneed’s Pincushion Cactus, Sneed’s Cory Cactus, Sneed’s Cscobaria, Carpet Foxtail Cactus[图片]Synonyms Coryphantha sneedii, Mammillaria sneedii Scientific Classification Family: Cactaceae Subfamily: Cactoideae Tribe: Cacteae Genus: Escobaria[图片]Description Escobaria sneedii is a small cactus growing up to 11 inches (27 cm) tall. The species may branch profusely, even when small and immature. It is coated densely in patches of bright white spines; each patch may have nearly 100. Depending on the substrate, the spines may be tinted with yellow, pink, purple, or brown. They may have dark tips and as the cactus ages the spines darken to gray and even black. The shape of the spines separates the varieties: Escobaria sneedii var. sneedii has straight spines that spread from the areole and Escobaria sneedii var. leei has curved spines. The cactus blooms in spring, bearing flowers up to 1.2 inches (3 cm) long near the top of its body. The flower is variable in color. It can be bright to pale pink, white to off-white, greenish, or brownish in color. Each tepal may have a darker midstripe of most any color. The fruit is generally either red or green, usually tinged with other colors, and may be up to 0.8 inch (2 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.

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2017年10月02日

Scientific Name Echeveria agavoides Lem. Common Names Molded Wax, Molded Wax Agave, Carpet Echeveria Synonyms Cotyledon agavoides, Echeveria obscura, Echeveria yuccoides, Urbinia agavoides, Urbinia obscura[图片]Scientific Classification Family: Crassulaceae Subfamily: Sedoideae Tribe: Sedeae Subtribe: Sedinae Genus: Echeveria[图片]Description Echeveria agavoides is a small, stemless, succulent plant, up to 5 inches (12.5 cm) tall, with a star-shaped rosette of fat leaves up to 8 inches (20 cm) in diameter. The apple-green leaves are triangular, with reddish edges and a terminal spine. The inflorescences in summer appear on slender, single-sided cymes up to 20 inches (50 cm) long. The flowers are pinkish-red with petals tipped with dark yellow.[图片]How to Grow and Care Most of the common Echeveria species are not complicated succulents to grow, provided you follow a few basic rules. First, be careful never to let water sit in the rosette as it can cause rot or fungal diseases that will kill the plant. Additionally, remove dead leaves from the bottom of the plant as it grows. These dead leaves provide a haven for pests, and Echeveria are susceptible to mealy bugs. As with all succulents, careful watering habits and plenty of light will help ensure success.[图片]Most Echeveria can be easily propagated from leaf cuttings, although a few are better from seeds or stem cuttings. To propagate a leaf cutting, place the individual leaf in a succulent or cacti mix and cover the dish until the new plant sprouts. Repot as needed, preferably during the warm season.

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2017年10月02日

Scientific Name Carpobrotus edulis (L.) N. E. Br. Common Names Ice Plant, Highway Ice Plant, Freeway Ice Plant, Pigface, Hottentot Fig, Sour Fig, Sea Fig, Cape Fig[图片]Synonyms Mesembryanthemum edule (basionym) Scientific Classification Family: Aizoaceae Subfamily: Ruschioideae Tribe: Ruschieae Genus: Carpobrotus[图片]Description Carpobrotus edulis is a creeping, mat-forming perennial succulent with leaves crowded along the stem, up to 5 inches (12.5 cm) long and up to 0.5 inch (1.2 cm) thick, sharply 3-angled and triangular in cross-section, yellowish to grass-green and reddish when older. The flowers are yellow or light pink, up to 6 inches (15 cm) in diameter. The fruit is up to 1.4 inches (3.5 cm) in diameter, fleshy, shaped like spinning top, on a winged stalk, becoming yellow when ripe.[图片]How to Grow and Care Growing Carpobrotus in containers is ideal, and you can overwinter them in temperate regions. Just bring the pot in and water it deeply. Cut back the plant and let it dry out and languish for the winter in a warm location. In March, resume regular watering and move the plant to a full light situation where it has some protection from burning rays. Gradually reintroduce the plant to temperatures outdoors until it can tolerate a full day outside.[图片]The only serious threats to the plant’s health are spittle bugs and some root rots and stem rots. You can avoid the rot by minimizing overhead watering during periods in which the plant will not dry off before nightfall. The bugs will remove themselves if you spray with a horticultural soap.

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2017年10月02日

Scientific Name Aloe ferox Mill. Common Names Bitter Aloe, Cape Aloe, Red Aloe, Tap Aloe, Bitteraalwyn (Afrikaans), Kaapse Aalwyn (Afrikaans), Kapaloe (Swedish)[图片]Synonyms Aloe galpinii, Aloe horrida, Aloe muricata, Aloe perfoliata var. ferox, Aloe pseudoferox, Aloe subferox, Aloe supralaevis, Pachidendron ferox, Pachidendron pseudoferox, Pachidendron supralaeve Scientific Classification Family: Xanthorrhoeaceae Subfamily: Asphodeloideae Genus: Aloe[图片]Description Aloe ferox can grow up to 10 feet (3 m) in height with leaves arranged in rosettes. The leaves are thick and fleshy, dull green, sometimes with a slightly blue look to them, and have reddish-brown spines on the margins with smaller spines on the upper and lower surfaces. The flowers are carried in a large candelabra-like flower-head and stand up to 4 feet (1.2 m) above the leaves. There are usually between five and eight branches, each carrying a spike-like head of many flowers. Flower colour varies from orange to bright red.[图片]How to Grow and Care Aloe is a very forgiving plant, and a well-grown Aloe can be quite beautiful. As with all succulents, it’s essential that Aloe is never allowed to sit in stagnant water, and the plant should be carefully monitored to watch for signs of overwatering. Prefers warmer temperatures of 70ºF/21ºC to 80ºF/27ºC, but will survive down to 40ºF/4.5ºC. Aloe are not particularly fast-growing and will only rarely need repotting. Repot plants in the spring that are tipping over their pots or have ceased growing.

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2017年10月02日

Scientific Name Jasminocereus thouarsii (F. A. C. Weber) Backeb. Common Names Candelabra Cactus Synonyms Cereus thouarsii, (basionym), Jasminocereus thouarsii var. thouarsii, Jasminocereus howellii, Cereus sclerocarpus, Brachycereus thouarsii, Cereus galapagensis, Jasminocereus galapagensis, Jasminocereus sclerocarpus[图片]Scientific Classification Family: Cactaceae Subfamily: Cactoideae Tribe: Browningieae Genus: Jasminocereus[图片]Description Jasminocereus thouarsii is a columnar cactus that can grow up to 16.4 feet (5 m) tall. It has tree-like form with a thick stem that usually separates into several branches. The stem is deeply ridged and bears clusters of long spines which may be colored white, yellow, reddish-brown or black. The scientific name is a reference to its attractive large jasmine-like flowers which have white and yellow petals. The plum-sized fruits grow on the trunks and bright red when ripe.[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. Well-drained soil is best, and most Cereus perform well in a soil that contains some organic material. Some recommend avoiding a soil that contains sphagnum moss, though – it can make the cactus vulnerable to root rot.[图片]Cereus cacti propagate quite easily from cuttings; simply sever a branch and replant in moist, well-drained soil. It helps to allow the cut end dry out and harden before you replant it; this makes it easier for the new cactus to form roots.

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