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Miss Chen
10월14일
Miss Chen
The bigleaf magnolia (Magnolia macrophylla) can be a stunning addition to the landscape. The oblong to obovate leaves on this magnolia tree can measure up to 3 feet long and 1 foot wide, hence the species name of macrophylla, which is Latin for "large leaves." The leaves are medium green on top and a silvery color on their undersides. The tree bears fragrant white flowers that are equally impressive and massive, with a span of roughly 8 to 12 inches. Even the elongated red fruits that follow the flowers offer visual interest. The fruits also are popular with birds and other wildlife. The tree has a moderate growth rate, gaining around a foot per year and forming a pyramidal shape. It can be planted in the fall or early spring.
Botanical Name Magnolia macrophylla Common Names Bigleaf magnolia, large-leaved cucumber tree, great-leaved macrophylla, umbrella tree Plant Type Tree Mature Size 30–40 ft. tall and wide Sun Exposure Full, partial Soil Type Loamy, moist, well-drained Soil pH Acidic, neutral Bloom Time Late spring to early summer Flower Color Creamy white with purple petal bases Hardiness Zones 5–8 (USDA) Native Area Caribbean, North America, Central America Bigleaf Magnolia Care Bigleaf magnolias are easy to care for when grown in optimal conditions. They do not suffer from any serious pest or disease issues, nor do they require regular pruning to maintain their shape. If you do need to prune to remove a misshapen branch, try to do so in the late winter or early spring. This will prevent the sap from bleeding. Remove any dead, damaged, or diseased branches as they arise. A drawback of bigleaf magnolias is it can take a decade or longer for them to begin to produce blooms. Also, because the leaves are so large, raking them can be quite a chore in the fall. Furthermore, they are fairly fussy about the soil in which they grow. They do not like very dry or very wet ground. And they are intolerant of pollution, meaning they do not make good street trees. Light Bigleaf magnolia trees need a site that has full sun to part shade. Two to five hours of direct sunlight each day is typically sufficient. Soil These trees prefer conditions that mimic their native woodland habitat. Loamy soil that is high in organic matter and drains well is ideal. And a slightly acidic to neutral soil pH is best. Water Bigleaf magnolias don't do well in soggy or bone dry soil. Always allow the soil to dry out somewhat between waterings, but never allow it to stay dry for too long. Water when the top inch of soil is dry to the touch. Bigleaf magnolias grown in exceptionally well-draining soil will need more frequent watering than trees grown in slow-draining soil types. Temperature and Humidity The bigleaf magnolia tolerates the temperature highs and lows of its growing zones well. Humidity also typically is not an issue as long as the tree's moisture requirements are met. A layer of mulch around the tree can help to keep the roots cool and retain soil moisture. One specific climate requirement of bigleaf magnolia trees is a location that does not experience strong winds. Because the leaves of this tree are so large, they are easily damaged by wind gusts. Fertilizer When grown in organically rich soil, bigleaf magnolias often don't need supplemental fertilizer. Signs that fertilizer is necessary include weak new growth in the spring and significant dieback. Use a slow-release fertilizer with a balanced formulation, and apply it during late spring or early summer Bigleaf Magnolia Varieties The bigleaf magnolia has been divided into three subspecies that some people treat as separate species. They are:
Magnolia macrophylla subsp. macrophylla: Known also as bigleaf magnolia, this tree sports leaves that can stretch from 20 to 36 inches long. And the tree itself can grow more than 60 feet tall. Magnolia macrophylla subsp. ashei (also Magnolia ashei): Known as the Ashe magnolia, this tree can grow up to 40 feet high. And its leaves stretch around 10 to 24 inches long. Magnolia macrophylla subsp. dealbata (also Magnolia dealbata): This tree has two common names: the Mexican bigleaf magnolia and the cloud forest magnolia. It can grow more than 60 feet high with leaves around 1 to 2 feet long. Its fruits also are fairly large at around 3 to 6 inches long. Propagating Bigleaf Magnolia Most growers prefer buying bigleaf magnolia trees from nurseries, but the trees can also be grown from seed. Collect ripe, fallen fruit from the ground, and remove the flesh, leaving only the seeds. Clean seeds can be stored in an airtight container in the refrigerator. Sow the seeds in the fall, but be aware that bigleaf magnolia seeds are known for having low seed viability. If you're not keen on trying your luck with the seeds, bigleaf magnolias can also be propagated via rooting softwood cuttings in the summer.
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Miss Chen
10월14일
Miss Chen

1、沙土 :以沙粒为主的土壤。含沙量可达85{bf}以上,而细土量仅占不到15{bf},可明显看到各种大小的沙粒。沙土通气透水,春季土温上升快,宜于发芽出苗。但保肥力差,易受干旱,本身养分少,是发小苗,不发老苗的土壤。可掺入塘泥等改良,化肥不宜多施用。在沙土上使用磷肥及微量元素,效果很好。
2、沙壤土:一种含沙粒多,含细土少的土壤。其含沙量可达55{bf}~85{bf},一般湿时能成球状,但球面不平,如将其搓成大拇指粗的条状时,易碎成大小不同的土块,干土块易压碎。这种土壤土质松散,通气透水,不黏不硬,宜于耕作,但保肥、保水力仍较差,发小苗,不发老苗,后劲差。施肥时应多施黏粪。施化肥应以“少吃多餐”为原则,勤施、少施,以防肥料流失。
3、壤土:一种土性良好的沙黏含量适宜的土壤。其特性是松而不散,黏而不硬,既通气透水,又保水保肥,且肥力较高,宜于种植各种植物。人工配制壤土,可用20{bf}的黏土、30{bf}~40{bf}的淤泥、300/0―400/0的沙,充分混合。因有黏土,保水保肥力强;因有沙,排水好;因有淤泥,有一定的肥效。
4、黏土:细土含量占绝对优势,而含沙量很少的土壤。细土含量达45 010以上,其中粒径为0.02―2毫米的沙粒仅占不到35{bf}。黏土有较高的保水、保肥能力,含植物所需养分较多,但通气透水性差,适合栽培水生植物等,栽培其他花卉时需要适当掺沙,多施有机肥料进行改良。
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Miss Chen
10월13일
Miss Chen
You may not be familiar with the term bidens plant, but there is a good chance you’ve spotted this prolific growing plant with daisy-like blooms. Part of the aster family, there are more than 200 species of bidens plants with native types in such farflung places as Hawaii, Mexico, and Europe. In the United States, these plants are considered a native species in every state except Wyoming. If you encounter wild-growing bidens, you’ll recognize them for the tiny, sticky seeds that cling to your clothing or in your dog’s fur. The good news is that most commercially-available bidens have been cultivated to avoid the sticky seed problem. These flowering plants typically have blooms in yellow or orange, but newer varieties include pink, gold, and white blossoms. In warmer climates where winter temperatures stay above 40 degrees Fahrenheit, bidens are a perennial plant. Though they lose their blooms in late fall and winter, the beautiful foliage of this plant stays green all year long. In northern climates where winter temperatures fall below freezing, they are considered an annual and need to be replanted each year.
Botanical Name Bidens Common Name Bidens Plant Type Annual or perennial Mature Size 6-12 inches tall, 1-3 feet wide Sun Exposure Medium to full sun Soil Type Rich and well-drained Soil pH Slightly acidic to neutral Bloom Time Summer Flower Color Yellow, Gold, White, Pink, Orange Hardiness Zones 8 to 11 Native Area Americas, Africa, Polynesia, Europe, Asia How to Grow Bidens Growing virtually all types of bidens is relatively easy. These plants have abundant greenery growth and produce many blooms—as long as they have rich soil and sufficient drainage. They tolerate drought and heat relatively well and require part to full sun. You won’t need to deadhead the plant for it to continue blooming during its long flowering season of May to October. In the winter, the plant will die off if temperatures fall below freezing. Otherwise, it will retain its greenery through the winter months and rejuvenate in the spring. Popular in both gardens and in containers, bidens are considered an excellent choice as a spiller plant. Light Bidens can grow in partial sun conditions, but for the biggest and best blooms, full sun is preferred. Any location you choose to plant bidens should receive at least 4 hours of direct sunlight per day. Without adequate light, the plant will still grow but may not produce as many blooms and is likely to be leggier. Soil Whether you’re planting bidens in an outdoor garden or a container, ensure that they have well-drained soil to avoid problems with root rot. In addition, this abundantly blooming plant thrives in rich, humus soil. It can tolerate a variety of pH levels in soil, but is generally considered to do best in neutral to slightly acidic soil types.
Water These plants are considered fairly drought-resistant. However, they do require regular watering for their best appearance and longevity. An inch of water per week is typically sufficient; water before wilting begins. Temperature and Humidity Warm temperatures don’t put a damper on the growth and blooming of most varieties of bidens. With many of these plants being native to warm weather locales like Hawaii, Mexico, and Polynesia, it’s safe to say that they won’t mind a little heat and humidity! The drought resistant quality of this plant also helps it to endure hot, dry conditions. However, if such a spell of dry weather persists, it’s best to provide these plants with regular watering to offset the impact of the heat on the plant’s foliage and blooms. On the other hand, if temperatures dip too low, bidens plants will suffer. These plants are not frost-resistant and will die under 40 degrees Fahrenheit. In climates that keep above this threshold, the plant will return year after year as a perennial. Otherwise, it will need to be re-planted as an annual each year. Fertilizer To flourish, the abundantly flowering bidens plant will require nutrient-rich soil. How much fertilizer to use and what type is generally specified by the specific type of bidens plant you’re growing. It’s generally recommended to supplement this plant with a general-purpose fertilizer or to use a timed-release fertilizer when planting. Fertilizer is especially important if you are growing bidens in a container. Propagating Bidens It’s relatively easy to turn one bidens plant into many, since these plants can be propagated by seed, cuttings, or through dividing. To propagate by seed, you should plan to sow the seeds at the end of winter or beginning of spring. Keep in mind that this plant prefers warm weather, so wait until after the last frost if you’re sowing seed in an outdoor location. If you want to propagate by cuttings, take an actively growing stem with a node from the plant. Plant it in moist, rich potting soil and water generously and often until new growth emerges. Finally, you can divide bidens plants to create more of these flowering beauties. For bidens growing as perennials in southern regions, wait to divide the plants until the spring. Varieties of Bidens Bidens alba – Resembling a daisy, this bidens plant variety features white petals and a bright yellow center. It’s also sometimes referred to as beggarticks or Spanish needles. Bidens 'Campfire Burst' – This variety of bidens is hard to miss, thanks to the brightly hued flowers crowning each plant. The tri-colored petals are shaded inward from a deep red to a blazing orange and a zippy yellow. They flower abundantly from the summer into the fall and are a great colorful addition to any landscape design. Bidens ferulifolia 'Golden Nugget' – With yellow petals that resemble a star and an orange center, the Golden Nugget variety is one of the most eye-catching bidens plants. It’s a native of Mexico and is also called the Apache beggartick or fern-leaved beggartick, courtesy of its fine, soft foliage. Pruning Bidens are easy to maintain and don’t need to be pruned or deadheaded. However, in favorable growing conditions, you might choose to prune the plant back if it becomes too large. Being Grown in Containers While bidens are a popular pick for gardens and landscaping, they also make an excellent choice for container gardening. The abundant foliage and flowers are well-suited to flower boxes or hanging planters. Much of the care of bidens grown in containers remains the same, however it will be important to fertilize these plants since they require rich soil for flowering and overall vitality.
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Miss Chen
10월13일
Miss Chen
1、在选购盆花时,初学者最好是直接买已服盆的。如为观花植物,最好是已孕蕾且一两朵花已初放的,这样既容易成活又不易搞错。
2、购买没有上盆的花苗时,要注意花苗根部带不带土球。常绿花木如米兰、九里香、柑橘类、松柏类等苗木,根部不带土球,很难成活,不能买。带土球的苗木,要选土球较大没有松散的买。花苗高30厘米,土球直径要在10厘米以上。土球过小、破裂或为用稻草和泥土包的假土球都不能买。随带的土球应是不太板结、较疏松的土壤。可轻轻掰开土球的小部分观看,如是白色的细嫩幼根才能买;如见根系发黑,说明根已霉烂,不能买。落叶裸根花苗,如根须稀少,或已开花、发芽者均不能买。如是刚上盆的花木,尚未冒芽不要买,因其多为从外地运归,刚上盆就拿来出售,未经一段养护时间,尚未服盆,难以保证成活。可扒开部分盆土检查,盆土与原土球能明显分开的,则为刚上盆的。 3、没有经验的人在集市上不要买小苗。因为未上盆的小苗买回去很难养活,此外一些小苗只有几张叶片,既无花朵,又无花苞,很难识别。特别是购买价钱较昂贵的花木,如茶花等植株时,最好不要买小苗,以防上当。还有的商贩出售假苗木,如把海桐当作瑞香,把一般地柏当成珍珠地柏,把大叶黄杨和女贞当作桂花出售,把迎春、黄金条作为夜丁香卖。还有把海桐当含笑,竹柏当瑞香,朱顶红当君子兰,瓜子黄杨当米兰,野水仙当郁金香等。有时,在农贸市场上还有一些人将九死还魂草中插上山茶或月季花拍成照片来兜售假“花苗”。九死还魂草学名叫卷柏是一种蕨类植物,野生时,长在荒山岩石壁上。它的生命力特别强,干枯的植株一泡水就能返青活过来,可以用做盆景中盆面或假山的点缀。但它是蕨类植物,永远不会开花。
4、野生树桩也有花样,特别是雀梅、榆树、鸟不宿、杜鹃花、紫薇花等野生盆景树桩的选购。这些树桩都是从山上挖来的,树型美观,价格低廉,在选购时,要特别注意根部的细根情况,如果只有被截断了的主根,而没有细根的,就很难成活。还有,由于沿途风吹日晒,使枝条和根系萎蔫干瘪的,买去后成活率也不高。 5、其次要警惕商贩用断枝或刚嫁接的苗木冒充好苗。如一位顾客买回一盆五针松,发现枝干摇动,拔出一看,原来是剪下来的一根五针松枝条,插入盆内当活苗卖。还有人把嫁接好的五针松用黄鱼胶涂上接口处,当成活苗出售。
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