动态第147页 - 绿手指 - 养花技巧、花生病了怎么办、花园打理和设计

2018年08月18日

An evergreen, foxtail fern (Asparagus densiflorus "Myers") has delicate-looking, plumed stems, which are lined with pointed, bright green leaves. Despite its ferny appearance, foxtail fern is a flowering plant. Forming fluffy mounds 2 feet tall and up to 4 feet wide, foxtail fern works wells as a houseplant, specimen, container or border plant, requiring minimal maintenance and care. Foxtail ferns are generally free from pests and disease (ref 5) [图片]Warm-Climate Plant Foxtail fern grows outdoors in U.S. Department of Agriculture plant hardiness zones 9 through 11, growing in full sun to light shade. Dappled sunlight is best. If it gets too much sun, its leaves may drop. If you're growing multiple plants, space them 18 to 24 inches apart. Foxtail fern can tolerate temperatures as low as 20 degrees Fahrenheit. Where not hardy, foxtail fern may be grown as a houseplant in front of a bright, sunny windowsill with temperatures between 60 and 75 degrees F. The decorative red berries are mildly toxic if eaten, so warn children not to sample them. Water Regularly Foxtail fern tolerates a range of soil types, as long as it is well-draining. Water regularly and deeply, allowing the soil to dry out somewhat between waterings. Do not allow the soil to become flooded or waterlogged. Reduce watering in the winter, but do not allow the soil to become completely dry. Insufficient water may cause leaf drop. If you're growing it in a container, choose a pot with at least one drainage hole. Increase humidity for indoor plants by placing the container on a tray with wet pebbles and misting the plant regularly with room-temperature water. Fertilize Monthly During the growing season, fertilize outdoor plants monthly with 3 ounces of a 10-10-10 fertilizer mixed into 1 gallon of water per 10 square feet of bedding space. Check the label as directions vary among brands. Fertilize indoor plants monthly during the growing season with 7 drops of a liquid 10-10-10 fertilizer per 1 quart of water. Don not fertilize in winter. Winter Considerations Winter temperatures in the mid to low 20s Fahrenheit may damage foliage in the winter. In early spring, trim frost-damaged foliage to help the plant regain its good looks. (ref 6) Disinfect pruning equipment afterwards by soaking tools for 5 minutes in a solution that is equal parts alcohol and water. Rinse with water and air dry. If there is no rainfall, water plants monthly. To help prevent winter dehydration, mulch around the plant with 2 to 3 inches of organic mulch, such as shredded deciduous plant leaves or pine boughs. Remove mulch in the spring, after frosts have passed. (last ref)

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Miss Chen

2018年08月18日

Each spring a new batch of Easter lilies (Lilium longiflorum) arrives just in time for their namesake holiday. Although many people treat them as annuals, the website Flower Garden Bulbs states they are perennials into U.S. Department of Agriculture plant hardiness zone 4. [图片]Timeframe Professional nurseries are experts at forcing Easter lilies to bloom right in time for Easter, whether it falls in March or April. As a perennial, your Easter lily will probably not bloom until June or July of the following year. Procedure Keep your potted plant in the house out of direct sunlight in a room that is about 65 degrees and away from drafts or heating ducts. Remove the foil or plastic casing around the pot when you water the plant to avoid drowning your lily. To enjoy your Easter lily as a perennial, plant the bulbs late in the spring after all danger of frost is over. Plant the bulbs about 3 inches below the soil and 12 to 18 inches apart. [图片]Expert Insight To help ensure that your Easter lily survives into another year in colder areas, protect it through the winter. The Texas Agrilife Extensive Service recommends a mulch of straw, pine needles, leaves, boxes and bags; remove when the plant sprouts in spring.

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Miss Chen

2018年08月18日

Boston ferns (Nephrolepis exaltata), sometimes called sword ferns, have bright green fronds that grow up to 3 feet long and 6 inches wide. The fronds have serrated edges and a rough texture. They are shade-lovers and grow best in soil that is very rich and lightly moist. Boston ferns are hardy in U.S. Department of Agriculture zones 8B through 11 and can be planted outdoors during any season. Frost will kill the foliage during winter, but new fronds emerge from the center of the plant once temperatures warm in spring. [图片].jpg"> Step 1 Use a garden fork to loosen the soil 10 to 12 inches deep. Amend with 2 to 3 inches of organic compost. Step 2 Dig a hole the same depth and 2 to 3 inches wider than the fern's root system. Place the roots into the soil at the same level they were growing before. Backfill with the loosened soil and water until it is well-moistened, but not soggy. Step 3 Check the soil regularly and water whenever the top inch is dry. Step 4 Feed once each month, from spring until fall, with houseplant fertilizer. Step 5 Clip off damaged fronds as necessary. [图片]Step 6 Divide every two to three years in early spring.

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Miss Chen

2018年08月16日

A low-maintenance plant, ferns grow well in most homes. Many ferns are tropical in origin and can only be grown indoors where they are protected from frost. One of the primary reasons the plants suffer is from improper care. Ferns have different light, water and fertilizer requirements when compared to other common houseplants. If the ferns are weak or dying, ensuring they receive what they need to remain healthy usually revives the plants. [图片]Step 1 Move the fern away from direct sunlight, if applicable, as overly bright light burns the plant and causes wilting. Ferns prefer indirect light such as that from a north-facing window. Step 2 Provide humidity around the fern. Fill the drip tray with a 2- to 3-inch layer of pebbles. Add water to the tray until the water level sits jut beneath the top of the pebbles. Set the pot on top of the pebbles and replenish the water in the tray as necessary to maintain the water level. The evaporating moisture from the tray adds humidity to the air around the fern. Step 3 Water the ferns before the soil dries out completely, as these plants require a high-moisture environment. Feel the soil once or twice a week and water as soon as the top inch of soil begins to feel dry but before it dries completely. Water at the base of the fern until the excess moisture drains from the bottom. Too little water causes the fern to wilt or drop fronds. Step 4 Keep ferns in a 68 to 72 degree Fahrenheit room. Temperatures can drop as low as 62 F at night. Most ferns cannot tolerate overly cold or hot temperatures. [图片]Step 5 Fertilize with a weak solution once a month, as over-feeding can kill the plants. Apply a general-purpose, water-soluble houseplant fertilizer at half the rate recommended on the package. Only fertilize growing ferns; the plants don't require fertilization when they are dormant.

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Miss Chen

2018年08月16日

Sedum plants, also called stonecrop, require very little water to survive. The fleshy, plump leaves store water, making sedums tolerant of drought and dry, harsh conditions. All plants need water, and sedums are no exception — the trick is to water enough to keep the plants happy without watering too much. Sedum plants are easy to over water both in the ground and in containers. An over-watered sedum is likely to flop over and die more quickly than an under-watered sedum. [图片]Step 1 Water sedums in the garden only during hot, dry weather. Press your index finger into the top 2 inches of the soil. If it is dry at the bottom, soak each plant until the ground is damp 4 inches deep. Step 2 Allow sedums to dry out between waterings. In wet and rainy weather, do not provide sedums with additional water. Step 3 Water potted sedums when the top 1 inch of soil dries out. Press your index finger into the soil at the edge of the pot to see how deep the moisture level is. [图片]Step 4 Place the pot into the sink and soak it with water until it runs out of the drainage holes in the bottom of the pot. Leave the pot in the sink to drain before replacing it in its permanent location.

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Miss Chen

2018年08月16日

Dracaena corn plants (Dracaena fragrans 'Massangeana') belong within the family Agavaceae. This evergreen, perennial shrub thrives outdoors in frost-free areas of the United States. Plants grow slowly, reaching up to 15 feet tall at maturity. Sword-like leaves reach up to 1 foot long and grow in bunches at the top of tall trunks, or canes. Plumes of fragrant white flowers bloom periodically year-round. Plants are suitable used as specimens, houseplants, or grown in containers or planters. Gardeners can prune corn plants to control its size, or start new plants from the cuttings. [图片]Step 1 Wipe the blades of loppers or pruning shears off with a cloth dipped in alcohol or bleach to sterilize pruning tools before cutting the corn plant. This kills any bacteria or diseases on the blades that can infect the corn plant through the fresh cut. Step 2 Trim off green branches or shoots using pruning shears, if doing a light pruning to the corn plant. Cut off the branch at the desired location, or flush with the trunk. The branch will sprout two to three new stems in cuts not made flush to the trunk or cane. Step 3 Trim through thick cane sections using loppers. Select the area on the corn plant's trunk you desire to cut it back to and slice through the area using loppers. Two to three new branches will develop where you made the cut. Step 4 Prune off a trunk or cane flush to the ground, if pruning away multiple trunks. Cut the cane off using loppers and pile soil on top of the cut so it does not sprout back. Use this method if you desire a single-trunk corn plant, or desire to eliminate a trunk. [图片]Step 5 Trim off plumes of spent blossoms. Use pruning shears and trim the dead flower section back to the foliage.

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Miss Chen

2018年08月16日

Jasmine is a flowering, fragrant, perennial evergreen. Depending upon its variety, jasmine may be planted as a ground cover, an ornamental bush, or trained along fences and other supports. In Texas, the best time to plant jasmine depends upon its variety and the age of the plant. [图片]Varieties Jasmine comes in shrubs -- bush and climbing vines -- and ground cover. Shrub varieties include Jasminum floridum, or Florida jasmine, and Jasminum primulinum, or primrose jasmine. Jasminum humile, or Italian jasmine, and Gelsemium sempervirens, or Carolina yellow, are two climbing varieties of jasmine. Asiatic jasmine, also known as Dwarf Confederate jasmine or small leaf Confederate jasmine, is a ground cover. Time Frame Shrubs and climbing jasmine can be planted in either mid spring or September through November. Planting time for ground cover Asiatic jasmine depends upon the size of the plant. Plants that are purchased in 1-gallon containers can be planted any time of the year. If the winter is mild, plants in 4-inch containers can be planted any time as well. Smaller plants in 2-inch containers need to be planted in the spring. [图片]Warning Do not plant jasmine where young children or animals can reach it. The berries of jasmine shrubs are poisonous. If ingested, they can affect the digestive and nervous system and, in some cases, cause death.

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Miss Chen

2018年08月16日

Crocosmia (Crocosmia x crocosmiiflora), also known as montbretia, is a sturdy summer bloomer that produces thick, strappy foliage topped with masses of bright, funnel-shaped flowers in shades of orange, yellow or red. At maturity, the flower stalks grow to heights of 2 to 3 feet. Native to South Africa, crocosmia flourishes in U.S. Department of Agriculture plant hardiness zones 6 through 10. In cooler climates, crocosmia's bulblike corms must be removed from the ground in autumn and stored for the winter. [图片].jpg"> Plant crocosmia corms after the ground can be worked in springtime. Select a spot with well-drained soil, and work a balanced fertilizer into the soil before planting. A granular, slow-release, 10-10-10 fertilizer at a rate of 1 tablespoon per 3 square feet is sufficient. Plant the corms 6 to 8 inches apart and 3 to 5 inches deep. The plant likes full sunlight but tolerates light shade. In warmer climates, crocosmia can be planted in either fall or spring. [图片]Water the crocosmia deeply at planting time, approximately 1 gallon of water per square foot, so the soil is saturated. After that time, crocosmia requires no supplemental irrigation until growth emerges in a few weeks. After growth appears, water crocosmia thoroughly to saturate the soil every seven to 10 days. [图片]Spread 2 to 3 inches of organic mulch over the planting area after planting the crocosmia. Mulch helps retain the soil's moisture and keep soil temperatures from fluctuating. Mulch also helps deter growth of weeds that compete with crocosmia for moisture and nutrients. [图片]Fertilize crocosmia, using a general-purpose garden fertilizer, when the shoots are 6 to 8 inches tall. Use a water-soluble fertilizer with all three numbers the same, such as 15-15-15. Mix 1 tablespoon of fertilizer with 1 gallon of water, and water thoroughly. Repeat the process again when the blooms appear. [图片]Clip crocosmia blooms as often as desired for cut flower bouquets. Use sharp garden scissors, and sterilize the blades with household disinfectant before and after cutting to prevent spreading disease. Remove spent blooms regularly, by hand or with scissors, to promote more blooms. After blooming, leave the foliage. Let it die down naturally on its own. This helps refuel the corms for next year. [图片]Divide crocosmia every three to four years to keep the plant from becoming overcrowded. Don't divide more often; crocosmia blooms most profusely when slightly crowded. Dig the entire clump in autumn with a garden spade, then divide it into smaller sections. Wear gloves, gently pull the corms apart, and replant the smaller sections in a prepared spot. Crocosmia has few pests or diseases, but throw away any soft or damaged corms that look unhealthy. [图片]Dig crocosmia corms after the foliage dies down in autumn, if you live in a climate cooler than USDA zone 6. Place the corms in a sheltered spot to dry for one or two days, then place the corms in a paper bag or cardboard box filled with sawdust or peat moss. Store the bulbs in a cool, dry room where temperatures will stay between 35 and 45 degrees Fahrenheit for the winter months. When spring arrives, replant the crocosmia corms in your garden.

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Miss Chen

2018年08月16日

Ferns are among the oldest types of plants still surviving on the planet, and some species have remained virtually unchanged for tens of millions of years. They are also one of the most diverse groups of plants, with thousands of species spread across most temperate parts of the globe. [图片]Ancient Ferns During the Carboniferous Period, which ended about 300 million years ago, ferns were the dominant form of plant life on Earth, and although many ancient ferns were nearly identical to fern species alive today, the Carboniferous forests were home to towering tree ferns that created a canopy under which smaller ferns grew. Although modern tree ferns, which are much like their ancient ancestors, have structures similar to other ferns, they grow to immense sizes and resemble full-size tropical trees. The Australian tree fern (Sphaeropteris cooperi) grows in U.S. Department of Agriculture plant hardiness zones 10b through 11, and it can be grown indoors in a container. This fern grows a single trunk that can be up to 12 inches in diameter, and it unfurls fronds that are between 12 and 18 inches long. This tree fern can grow 15 to 30 feet tall. Colorful Ferns Many fern species grow in the shady, moist environments under forest canopies and blend into the undergrowth, but not all ferns are green. Some species are nearly as showy as vibrant garden flowers. The new growth of some ferns is strikingly orange, red or yellow, and some species have brilliantly colored stems or variegated leaves. The Japanese painted fern (Athyrium niponicum var. "Pictum") is a delicate, low-growing fern that grows in USDA zones 5 through 8. Its red-purple leaf stems contrast with the silvery sheen of its leaflets, and it grows in 8- to 12-inch-tall clumps that hug the soil. Unfurling Fronds Fern leaves are called fronds, and their structure is different than other plants. Fern fronds usually sprout directly from the plant's underground structure without any stem, and the fronds gradually unroll from base to tip, forming the familiar "fiddlehead" shape in the process. Fern fronds are made up of a central stem called a rachis and small leaflets that grow along the rachis. In some species, the frond is divided, with a smaller rachis branching from the central stem; then an even smaller rachis branches from that one, until the frond is divided as many as four or five times. [图片]Spores, Not Seeds Most flowering plants reproduce through seeds that develop from flowers, but ferns have neither flowers nor seeds. It's their lack of seeds that sets them apart from both flowering plants and cone-bearing plants. The fern's life cycle begins when the adult fern plant, called a sporophyte, produces and sheds spores, tiny seedlike capsules that are dispersed by water or wind to a location away from the parent plant. In the new spot, the spore germinates and produces a new plant, called a gametophyte. The gametophyte, which is often tiny and inconspicuous compared to the sporophyte, then produces both egg and sperm cells. The sperm cells fertilize the egg cells, and the fertilized egg grows into a new sporophyte.

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Miss Chen

2018年08月15日

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