[图片]#郁金香 品种繁多，是一种十分珍贵的春季花卉，无论盆栽，庭院种植，还是切花插瓶，均受到很多人的喜欢。但是在养殖过程中常会出现问题，最近就有花友问花匠大叔：“郁金香叶子发黄是怎么回事呢？郁金香叶子发黄了该怎么办呢的问题，下面介绍郁金香叶子发黄的原因与解决方法。 1、水分不足 郁金香喜欢凉爽湿润的环境，一般应在秋季10、11月份栽种，在低温中它生根、发芽。在第二年的4、5月份开花，花后正值盛夏开始，它进入休眠，待秋天再次发芽生长。如果你移栽过晚，根茎来不及服土，水分又供应不足，叶子就会变黄。 2、缺肥 郁金香叶子发黄是缺磷的结果。每一种肥料分管植株的不同部分，缺磷的话也会使郁金香的叶子又黄又蔫。 解决方法：施肥应以液肥为主，每周一次施稀薄液肥，叶子发黄期间可以适当增加磷肥。 [图片]3、病虫害、植株过密 主要是郁金香枯萎病，危害叶片。原因有二，一是郁金香栽种过密，通风不当，导致病害频发。二是枯叶未及时清理，引起真菌感染。 解决方法：病虫害主要是真菌感染的要用消毒液杀菌，或者直接喷洒稀释农药。 如果植株过密，就要进行分株移栽，保证植株之间有一定的空隙，通风良好。还需及时的清理枯萎的叶片。如果是盆栽的，尽量移到通风处养护。 4、光照问题 郁金香上盆后半个多月时间内，应适当遮光，以利于种球发新根。 解决方法：充足的光照对郁金香的生长是必需的，光照不足，将造成植株生长不良，引起落芽，植株变弱，叶色变浅及花期缩短。 [图片]5、温度过高 郁金香耐寒不喜温，在-35℃都可生存，但生长温度超过20℃，生长缓慢。普通的家庭种植盆栽，放在室内还是不大合适的。 解决方法：合理控制温度，当温度达到20℃以上，可以向植株周围洒水降温。 【小贴士】郁金香栽培过程中切忌灌水过量，但定植后一周内需水量较多，应浇足，发芽后需水量减少，尤其是在开花时水分不能多，浇水应做到"少量多次"如果过于干燥，生育会显著延缓，郁金香生长期间，空气湿度以保持在80%左右为宜。

Scientific Name Calla palustris L. [图片]Common Names Bog Arum, Water Arum, Marsh Calla, Wild Calla, Squaw Claw Synonyms Calla palustris f. palustris, Calla brevis, Calla cordifolia, Calla generalis, Calla ovatifolia, Callaion bispatha, Callaion brevis, Callaion heterophylla, Callaion palustris, Dracunculus paludosus, Provenzalia bispatha, Provenzalia brevis, Provenzalia heterophyla, Provenzalia palustris Scientific Classification Family: Araceae Subfamily: Calloideae Tribe: Spathiphylleae Genus: Calla [图片]Flower Color: White Bloom Time: Summer Description Calla palustris is a rhizomatous herbaceous perennial plant growing in bogs and ponds. The leaves are rounded to heart-shaped, up to 5 inches (12.5 cm) long and wide, on a up to 8 inches (20 cm) long petiole. The greenish-yellow inflorescence is produced on a spadix up to 2.4 inches (6 cm) long, enclosed in a white spathe. The fruit is a cluster of red berries, each berry containing several seeds. Hardiness USDA hardiness zone 4a to 7b: from −30 °F (−34.4 °C) to 10 °F (−12.2 °C). [图片]How to Grow and Care Water Arum is found in bogs and marshes as it is a plant of shallows, cold water, and wet soils. It can tolerate up to 2 inches (5 cm) of standing water and grows best in full sun. It grows from submerged creeping rhizomes that are horizontal near the surface of the soil. In summer, the growing shoots can be cut off, to encourage branching, and pushed into the soil to propagate. These perennial also frequently vegetatively reproduce by producing offsets through its rhizomes. It can be grown both in wet soil and in marshy, muddy conditions with still, shallow freshwater. Plants tolerate close to full shade, but may become weak-stemmed and lean. In established ponds with good layer of sediment in bottom can be left to free float. A light mulch is necessary in extremely cold, snowless winters. Water Arum will not survive a dry spell. Origin Native to cool temperate regions of the Northern Hemisphere, in central, eastern and northern Europe (France and Norway eastward), northern Asia and northern North America (Alaska, Canada, and northeastern contiguous United States).

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[图片]#也门铁 又叫巴西铁，是现在比较流行的一种室内大型盆栽花木，因柱形简洁大方，叶子呈现绿色，非常的鲜亮，所以无论是摆放在办公室还是摆在家里，都是非常受欢迎的。但是在养殖的过程中常会出现一些问题，最近就有花友发现家里的也门铁叶子出现发黄的情况，下面介绍也门铁叶子发黄的原因和解决方法。 1、浇水过多(水黄)：因浇水过勤引起，其特点是老叶无明显变化、幼叶变黄。 解决办法：应立即控水。 2、长期缺水(旱黄)：因缺水、干旱引起，其特点是自下而上老叶先黄，若缺水时间稍长，则会全株黄叶，甚至死亡。 解决办法：应该适度的浇水，做到控制浇水。 3、阳光不足(缺光黄)：花卉常期光照不足，叶片中的叶绿素减少，使叶片绿色渐渐消失，呈现出白化病。 解决办法：可将植株移到阳光充足的地方，使叶片慢慢变青。 [图片]4、施肥过多(肥黄)：因施肥过勤或浓度过高引起；特点是幼叶肥厚，有光泽，且凹凸不平。 解决办法：应控肥、中耕、浇水，并且做到浇肥后要及时浇水，防治烧苗。 5、长期缺肥(缺肥黄)：因肥料不足、施肥浓度偏低，且施肥间隔时间过长而引起；其特点为幼叶、嫩茎处先黄，如见此现象后不及时施肥，也会造成全株黄叶甚至死亡。 解决办法：对缺肥的花卉，切忌一次大量施用浓肥，以免造成烧根； 6、湿热：一些不耐高温，高湿的花卉，因夏季炎热，通风暴不良，避阴不当而引起的发黄。 解决办法：要注意通风和降温，而盆土不能过温。 、

Scientific Name Calendula officinalis L. [图片]Common Names Marigold, Common Marigold, Pot Marigold, Garden Marigold, English Marigold, Scottish Marigold, Ruddles Synonyms Calendula aurantiaca, Calendula eriocarpa, Calendula hydruntina, Calendula officinalis var. officinalis, Caltha officinalis Scientific Classification Family: Asteraceae Subfamily: Asteroideae Tribe: Calenduleae Genus: Calendula [图片]Flower Color: Orange or yellow Bloom Time: June to November Description Calendula officinalis is a short-lived aromatic herbaceous perennial, up to 30 in (76 cm) tall with bright green leaves about 4 inches (10 cm) long. The upper leaves are lance shaped with pointed tips and the lower leaves are oval with a rounded tip. The flowers held on thick sturdy stems and are up to 3 inches (7.5 cm) in diameter. The inflorescences are orange or yellow, comprising a thick capitulum or flowerhead up to 3 inches (7.5 cm) in diameter, surrounded by two rows of hairy bracts. In the wild plant they have a single ring of ray florets surrounding the central disc florets. It is in flower from June to November. The flowers may appear all year long where conditions are suitable. [图片]How to Grow and Care The Calendula flower or flowering herb is an annual which will readily reseed. Too much care can result in stunted or slow growth of the plants. Poor to average, well draining soil and only occasional watering after plants are established is the secret to growing prolific Calendula plants. Like most herbs, Calendulas are adaptable and do not require a lot of maintenance. Roots will often adapt to the space provided. The amazing Pot Marigold can be grown in containers or beds in full sun to shade conditions. As the Calendulas prefer cool temperatures, flowers last longer in filtered sun or shady areas. If deadheaded regularly, this plant can bloom from spring through fall and beyond. In warmer areas, the Calendula may take a break from blooming during summer heat and then put on a show as temperatures fall in autumn. Regular pinching keeps the 1- to 3-foot (30 to 90 cm) plant bushy and prevents tall, spindly stalks. Origin Probably native to southern Europe.

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Scientific Name Calendula arvensis M.Bieb. [图片]Common Names Field Marigold Synonyms Calendula arvensis subsp. arvensis Scientific Classification Family: Asteraceae Subfamily: Asteroideae Tribe: Calenduleae Genus: Calendula [图片]Flower Color: Bright yellow to yellow-orange Bloom Time: June to November Description Calendula arvensis is an annual or biennial herb up to 20 inches (50 cm) tall. The leaves are lance-shaped and borne on petioles from the slender, hairy stem. The inflorescence is a single flower head up to 1.6 inches (4 cm) wide, with bright yellow to yellow-orange ray florets around a center of yellow disc florets. The fruit is an achene which can take any of three shapes, including ring-shaped. [图片]How to Grow and Care The Calendula flower or flowering herb is an annual which will readily reseed. Too much care can result in stunted or slow growth of the plants. Poor to average, well draining soil and only occasional watering after plants are established is the secret to growing prolific Calendula plants. Like most herbs, Calendulas are adaptable and do not require a lot of maintenance. Roots will often adapt to the space provided. The amazing Pot Marigold can be grown in containers or beds in full sun to shade conditions. As the Calendulas prefer cool temperatures, flowers last longer in filtered sun or shady areas. If deadheaded regularly, this plant can bloom from spring through fall and beyond. In warmer areas, the Calendula may take a break from blooming during summer heat and then put on a show as temperatures fall in autumn. Regular pinching keeps the 1- to 3-foot (30 to 90 cm) plant bushy and prevents tall, spindly stalks.

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#仙客来 是山东省青州市的市花，也是一种普遍种植的鲜花，适合种植于室内，非常漂亮。可是为什么漂亮的仙客来会掉叶子呢？有什么好办法补救呢？下面小九介绍仙客来掉叶子原因及解决办法。 [图片]1、温度过高会引起仙客来掉叶子，仙客来性喜温暖，怕炎热，在凉爽的环境下和富含腐殖质的肥沃沙质壤土中生长最好。当气温超过30度时，仙客来进入休眠期，叶片逐渐发黄凋萎，生成停滞，叶子就会枯黄掉光。 解决办法：需及时移至通风良好的阴凉处。 [图片]2、密不通风，若施氮肥过多，枝叶长得进于茂盛，加上长期未修剪，致使内膛枝叶光线不足，容易引起叶片发黄脱落。 解决办法：应合理施肥并加强修剪，使之通风透光。 [图片]3、空气干燥，室内空气过分干燥时，往往会出现叶尖干枯或叶缘焦枯等现象。 解决办法：在夏季仙客来休眠的炎热干燥时期，要注意向植株周围喷水降温，但注意浇水不可过勤，防止烂根。只要盆土湿润即可，或薄施一些腐熟饼肥水。只要根没死，天凉后再逐渐增加光照，促其健壮生长，很快就又会重新长出叶子的。

#仙客来 虽美但不好养,其中烂根就是广大花友们会碰到的问题之一，下面介绍仙客来烂根的原因和解决办法。 [图片]一、仙客来烂根常见的原因 1、仙客来喜湿润而透气的土壤环境。生长期间浇水过多会使盆土水分处于饱和的状态，根部长期处于一个窒息的状态，吸收能力衰退，土中缺氧，细菌活跃，产生了许多有害的气体，从而导致块茎腐烂。 2、仙客来是球根植物，若上盆时块茎的栽种比较深，施肥的时候淹没其顶部，也容易引起根部的腐烂。 3、翻盆时根系受到损伤，引起病菌从伤口处侵染导致烂根。 [图片]二、仙客来烂根的解决办法 1、为了避免仙客来烂根的情况，在浇水的时候，不能直接当头浇下，这样，块茎的中央会有积水。正确的方法是，把叶片轻轻抬起，沿着花盆的边缘，缓慢进行浇灌。并且，保证不干不浇的原则。 2、把叶片轻轻抬起，沿着花盆的边缘均匀的施肥。施肥不可以太浓，否则会烧根。 3、将仙客来拔出来根部洗净，将发霉的部分全部剪除。将创口和霉变的地方用多菌灵抹下，然后晾干，约三天。重新栽植到透水透气的土壤当中，大约一个月逐步进行恢复，但在发根未稳定其间应尽量少进行浇水。

[图片]#绿宝树 又名海南菜豆树，树形美观，树姿优雅，是一种深受人们喜爱的绿植。最近有花友询问花匠大叔：“绿宝叶子干枯掉叶子是怎么回事？绿宝叶子干枯掉叶子要怎么办呢”的问题。下面花匠大叔介绍绿宝树叶子干枯掉叶子的原因以及处理办法。 一、绿宝叶子干枯掉叶的原因 1、浇水过多:花卉顶上的嫩叶淡黄，老叶也在渐渐发黄掉叶，新梢萎缩。这是因为久雨或浇水过多，盆内过湿，土壤缺氧，根须腐烂造成的。 2、土旱:花卉顶上的叶色正常，下部叶片逐渐向上干黄脱落。这是由于盘土太满或长时间浇水不透，造成下部叶片枝干老化而引起的，应适量浇水，保持土壤湿润。 3、缺肥:花卉叶片薄而发黄，这是因为花卉的棵大盆小或长时间未换盆、换土以及肥料不足造成的，应逐渐增加水肥，适时换盆。 [图片]4、肥害:花卉叶片出现凹凸不舒展，新叶肥厚，老叶渐黄，应勤浇水，暂停施肥，盆内可撒点菜种子，出苗后拔去，以消耗盆内肥分，使花木恢复正常生长。 5、光照不适:绿宝树喜光照，常放在室内光照不足，也会引起叶子干枯掉叶子。 6、病虫害：在高温、高湿通风不好的环境中，叶片容易感染叶斑病、介壳虫等病虫害，从而导致绿宝树掉叶子。 [图片]二、绿宝叶子干枯掉叶的处理办法 1、浇水：一个星期浇水两次就足够了，这个可以灵活掌握，主要是看盆土。盆土发白就要浇水而且要浇透，如果湿润的话就不用浇水。平时应该常松土，控制浇水。 2、光照：绿宝树为喜光植物,也稍能耐阴。全日照或半阴环境均可。但是夏季不要让阳光直射,要搭棚遮光。盆栽植株在室内摆放时最好摆放在光照充足的窗前或阳台上接受半阴或散射光照。如果长时间将其放在光线暗淡的室内,易造成落叶。家庭盆裁时越冬期间可将其摆放于窗前或阳台前较高的部位,让其多接受光照。 3、病害防治：加强通风透光，注意控制环境湿度，避免叶面长时间滞水。发现少量病叶应及时将其摘除烧毁。发现叶斑病喷洒50%的多菌灵可湿性粉剂600倍液，每半月一次，连续3-4次。发现少量介壳虫时可及时用湿布抹去，也可用透明胶带将其粘去。

Scientific Name Caleana major R.Br. [图片]Common Names Flying Duck Orchid, Duck Orchid, Larger Caleana, Large Duck Orchid Synonyms Caleya major Scientific Classification Family: Orchidaceae Subfamily: Orchidoideae Tribe: Diurideae Genus: Caleana [图片]Flower Color: Reddish-brown Bloom Time: September to January Description Caleana major is a terrestrial orchid, up to 20 inches (50 cm) tall. The single leaf is usually prostrate, narrow-lanceolate, up to 5 inches (12.5 cm) long and up to 0.3 inch (8 mm) wide, often spotted, and appears near the base of the stalk. The flower is reddish-brown, up to 0.8 inch (2 cm) long. Flowering occurs from September to January. [图片]How to Grow and Care Use of Flying Duck Orchids in gardens is not recommended, unless they already occur naturally, in which case they need to be protected. Removing Caleana major from the bush usually results in their death and further depletes remaining wild orchid populations. Plants flower for one or sometimes two years but progressively weaken until they die. Growing Conditions: Well drained soil in open forest and woodlands. Full sun, semi shade. Origin Native to New South Wales, Queensland, South Australia, Tasmania and Victoria.

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#断崖王子 叶子长黄褐斑是正常的损耗，有时候不小心刮破皮或者照顾不周又或者有虫子咬一下就会出现长黄褐斑的情况。那么遇到这些问题我们该怎么办呢？下面介绍断崖王子叶子长黄褐斑的防治方法。 [图片]断崖王子叶子长黄褐斑是怎么回事 由于浇水的水珠没有清理掉，或者是在大太阳下晒灼伤的，有时候不小划伤叶子以后留下的伤痕，也有可能是颗粒土划伤或者是鸟类虫子啃的疤，这些原因都有可能使断崖王子叶子长黄褐斑。 [图片]断崖王子叶子长黄褐斑怎么办 断崖王子叶子长黄褐斑，很多人都会担心是不是得了黑斑病，其实除了黑斑病，还有几种原因会让叶片长黄褐斑。 1、夏天叶片被太阳直射灼伤：如果你家多肉长时间放在太阳下，建议把它搬到半阴通风处养殖。 2、病虫害：多肉要是被害虫爬过或咬过，很多也会起斑，所以我们可以观察寻找害虫，用镊子处理它们！如果找不到或者是蚜虫介壳虫，建议用药物处理。 3、碰伤：有可能是植物叶片碰伤或者运输过程中导致，建议不要在有伤口的叶片上边喷水，容易导致叶片腐烂。 4、黑斑病：如果是黑斑病，那要用药才可以治疗，常规的用药还是多菌灵、百菌清，如果效果不明显，可以试试克菌康可湿性粉剂或者加大药量。