zt：如何種植、栽培和護理杜鵑花

How to plant, grow and care for Rhododendrons
如何種植、栽培和護理杜鵑花

Rhododendrons are best known for their spectacular clusters of large, showy and often fragrant flowers. These are typically tubular, funnel, or bell-shaped and available in a range of colours spanning reds, yellows, pinks, purples and even white. Most rhodos flower in spring but there is also a growing range of summer flowering varieties perfect for adding charm and beauty to your garden, whilst deciduous azaleas also offer beautiful autumn foliage colour. Originating from the Himalayas, Rhododendrons have long been a mainstay of the woodland garden since being introduced into Britain by Victorian plant hunters. They are acid-loving shrubs, generally growing well in partial or dappled shade and combining well with the likes of Pieris 'Forest Flame' and Euphorbia 'Tasmanian Tiger'. There are a huge range of rhododendrons with over 900 varieties spanning low growing ground cover plants to specimens that can reach 6 metres tall. Larger varieties make great hedges, screens and foundation plants whilst dwarf alpines are highly effective in rock gardens and compact hybrids look excellent in containers positioned in a shaded spot of the garden.
杜鵑花以其壯觀的大花簇、豔麗且芳香四溢而聞名。它們通常呈管狀、漏鬥狀或鍾形，有多種顏色可供選擇，包括紅色、黃色、粉色、紫色甚至白色。大多數杜鵑花在春季開花，但也有越來越多的夏季開花品種，非常適合為您的花園增添魅力和美麗，而落葉杜鵑花也提供美麗的秋季樹葉顏色。杜鵑花起源於喜馬拉雅山，自從被維多利亞時代的植物獵人引入英國以來，長期以來一直是林地花園的支柱。它們是喜酸灌木，通常在部分或斑駁的陰影下生長良好，並與“森林火焰”菜粉蝶和“塔斯馬尼亞虎”大戟等植物很好地結合。杜鵑花種類繁多，有 900 多個品種，從低矮的地被植物到高達 6 米的杜鵑花品種。較大的品種可以製作出很好的樹籬、屏障和基礎植物，而矮高山植物在岩石花園中非常有效，而緊湊的雜交品種在放置在花園陰涼處的容器中看起來非常出色。

 

Pink rhododendron flowers with orange throats
粉紅色的杜鵑花，橙色的喉嚨

 

 

Rhododendron Planting Guide
杜鵑花種植指南

 

 

Finding the right location
尋找正確的位置

• Rhododendrons are a bit fussy, so it's worth spending some time to make sure you get the planting location right at the outset.
  杜鵑花有點挑剔，所以值得花一些時間來確保從一開始就確定種植位置。

• Large-leaved varieties must have partial shade (a sunny spot that receives a couple of hours of shade in the morning and early afternoon is ideal) or dappled shade. On the fringe of an open tree canopy is good but avoid positioning rhododendrons in deep shade directly below a densely branching tree. Some shade in the height of the afternoon is particularly important for locations in the south of the UK that are a little hotter.
  大葉品種必須有部分遮蔭（理想的陽光充足的地方，早上和下午早些時候有幾個小時的遮蔭）或斑駁的遮蔭。將杜鵑花放在開放的樹冠邊緣是不錯的選擇，但要避免將杜鵑花放置在濃密的樹枝正下方的濃蔭處。對於英國南部天氣稍熱的地區來說，午後的一些陰涼尤其重要。

• Azaleas are much more tolerant of full sun and in fact dwarf alpine varieties actively prefer it. However, it is still important to prevent the soil surrounding azaleas from drying out.
  杜鵑花更能忍受充足的陽光，事實上，矮小的高山品種更喜歡陽光。然而，防止杜鵑花周圍的土壤幹燥仍然很重要。

• An acidic soil is essential, ideally humus-rich, moist yet free draining. If you have an alkaline soil, we recommend growing rhodos in a container, rather than trying to alter the acidity of your soil, which is not straightforward as the change is only temporary.
  酸性土壤是必不可少的，最好是富含腐殖質、濕潤但排水良好的土壤。如果您的土壤呈堿性，我們建議在容器中種植紅花，而不是嚐試改變土壤的酸度，這並不容易，因為這種變化隻是暫時的。

 

If growing rhododendrons in containers, use an ericaceous compost
如果在容器中種植杜鵑花，請使用杜鵑花堆肥

 

• Rhododendrons don't like having wet feet; in fact, soggy, waterlogged ground is the most common cause of failure. If you have a heavy clay soil, plant your rhododendron in a mound of improved soil as described below. On the flip-side, rhododendrons do like lots of moisture so avoid planting under the eves of building were rainwater won't find it's way to their roots. Azaleas are a bit more forgiving of soil conditions but again acidity is key.
  杜鵑花不喜歡濕腳；事實上，潮濕、積水的地麵是最常見的故障原因。如果您有重粘土，請將杜鵑花種植在一堆改良的土壤中，如下所述。另一方麵，杜鵑花確實喜歡大量的水分，所以避免種植在建築物的前簷下，因為雨水無法到達它們的根部。杜鵑花對土壤條件的適應能力更強，但酸度也是關鍵。

• Avoid planting too close to large trees, hedges and shrubs which will steal moisture and nutrients from the surrounding soil, as well as walls and fences. Look at the eventual spread of your preferred variety to determine how much space to leave between your plants and surrounding objects in your garden.
  避免種植得太靠近大樹、樹籬和灌木，它們會竊取周圍土壤以及牆壁和柵欄的水分和養分。查看您喜歡的品種的最終分布，以確定您的植物和花園中周圍物體之間應留出多少空間。

• Choose a location protected from strong, cold or drying winds and frost pockets. If your garden is particularly exposed, plant on the north side of a building or leeward side of a windbreak as flower buds are liable to dry out and die if they're left exposed. Rhododendrons will tolerate a more open site in less windy locations.
  選擇一個不受強風、寒冷或幹燥風和霜凍影響的位置。如果您的花園特別暴露，請將植物種植在建築物的北側或防風林的背風側，因為如果暴露在外，花蕾很容易變幹並死亡。杜鵑花可以在風較小的地方種植更開闊的場地。

 

Rhododendron flower buds starting to open in the spring
杜鵑花蕾在春天開始開放

 

Garden Design & Spacing 花園設計與空間

• Rhododendrons look best when grown in groupings to create block colours. Grow groups of 3-5 of the same variety in loose drifts and choose an overarching scheme of around 3 colours if you have a larger area to plant up.
  杜鵑花成群種植以形成塊狀顏色時看起來最好。在鬆散的土堆中種植 3-5 個相同品種的組，如果您有更大的種植麵積，請選擇大約 3 種顏色的總體方案。

• Check the eventual height and spread of your preferred varieties to determine how far apart to plant them. In theory plants should be positioned the same distance apart as their eventual spread, although it's possible to reduce this by up to 20% if you want more of an instant effect and/or want your plants to merge into blocks of foliage and flower colours over time. For example, for rhododendrons with an eventual spread of 2.5 metres, you could get away with planting 2 metres apart.
  檢查您喜歡的品種的最終高度和分布，以確定種植它們的距離。理論上，植物的放置位置應與其最終傳播的距離相同，但如果您想要更多即時效果和/或希望植物在一段時間內融合成樹葉和花朵顏色塊，則可以將距離減少最多 20%。時間。例如，對於最終蔓延 2.5 米的杜鵑花，您可以間隔 2 米種植。

 

When to plant 何時種植

• Containerised rhododendrons can be planted at any time of the year but if you're able to choose, either October or between March and April is best.
  集裝箱杜鵑花可以在一年中的任何時間種植，但如果您可以選擇，十月或三月至四月之間是最??好的。

• Autumn planting has the benefit of giving them time to settle in and grow new roots before winter, so they are well-established by spring and can really start putting on some growth.
  秋季種植的好處是讓它們有時間在冬季之前安頓下來並長出新根，因此它們到了春天就已經紮根，可以真正開始生長。

• On the other hand, by waiting until March-April you'll have the advantage of being able to see the colour and size of the flowers when you buy them (if you choose to visit our garden centre in Staffordshire to buy them of course).
  另一方麵，等到三月至四月，您在購買花朵時將有一個優勢，可以看到花朵的顏色和大小（當然，如果您選擇訪問我們位於斯塔福德郡的花園中心購買它們） 。

• Plant at a time when the ground is not frozen or waterlogged and ideally when it's not excessively windy. If planting in the spring it's best to wait until all risk of frost has passed.
  在地麵沒有結冰或積水的時候種植，最好是在風不太大的時候種植。如果在春季種植，最好等到所有霜凍風險過去。

 

Avoid planting rhododendrons when the ground is frozen or waterlogged
避免在地麵結冰或積水時種植杜鵑花

 

 

Soil preparation 整地

• Before planting your rhododendron, start by clearing any perennial weeds and grass from your planting site.
  在種植杜鵑花之前，首先清除種植地點的所有多年生雜草和草。

• Dig in plenty of ericaceous (lime free) compost or acidic organic mater into the soil. Good choices of materials are decomposing pine needles, composted tree bark, leafmould, chopped, composted bracken or peat substitute. Composted Christmas tree branches are also ideal. Do not use animal manure which is too strong for sensitive rhododendron roots or mushroom compost which is too limey.
  將大量的杜鵑花（不含石灰）堆肥或酸性有機物質挖入土壤中。好的材料選擇是分解的鬆針、堆肥樹皮、腐葉土、切碎的、堆肥的蕨菜或泥炭替代品。堆肥聖誕樹枝也是理想的選擇。不要使用對敏感的杜鵑根來說太濃的動物糞便或太石灰的蘑菇堆肥。

• Rhododendrons are shallow and reasonably wide rooting so it's important to mix this well into the soil both at and around the planting site. You'll need to build in at least 10 litres of compost for dwarf rhododendrons and 20 litres for larger hybrids, even on good soils. For specimens work on the basis of 60 litres per plant.
  杜鵑花的根係較淺且根係較寬，因此將其充分混合到種植地及其周圍的土壤中非常重要。即使在良好的土壤上，您也需要為矮杜鵑樹添加至少 10 升堆肥，為大型杜鵑花添加至少 20 升堆肥。對於標本工作，每株植物需要 60 升水。

• If you have an alkaline soil, one option is to increase the acidity of the soil using wettable sulfur or ferrous sulphate. Avoid using aluminium sulphate as it is toxic to rhododendron and azalea roots. At Jackson's Nurseries we actually advise against trying to make alkaline soils more acidic because it's not straightforward and any change will only last for a limited period with the natural alkalinity returning over time. Instead, grow a compact hybrid in container or install a raised bed, using a humus-rich ericaceous compost in both cases.
  如果您的土壤呈堿性，一種選擇是使用可濕性硫磺或硫酸亞鐵來增加土壤的酸度。避免使用硫酸鋁，因為它對杜鵑花和杜鵑花的根有毒。在傑克遜苗圃，我們實際上建議不要嚐試使堿性土壤變得更加酸性，因為這並不簡單，任何變化隻會持續一段有限的時間，隨著時間的推移，自然堿度會恢複。相反，在容器中種植緊湊的雜交品種或安裝高架床，在這兩種情況下都使用富含腐殖質的杜鵑花堆肥。

• If you're planting a full border, cultivate the whole area, rather than digging individual holes.
  如果您要種植整個邊界，請耕種整個區域，而不是挖單獨的洞。

 

Pine needles are ideal for incorporating into the growing mix
鬆針是融入生長混合物的理想選擇

 

How to plant a rhododendron
如何種植杜鵑花

 

 

• Dig your planting hole as deep as the root ball and twice as wide. You will be aiming to plant at the same level as your rhododendron was in the pot with the roots just very slightly below the soil.
  挖種植坑的深度與根球一樣深，寬度是根球的兩倍。您的目標是將杜鵑花種植在與花盆中的杜鵑花相同的高度，根部略低於土壤。

• Next, take the root ball out of its container and gently tease out any roots that may have started to circle around the base of the pot by pushing your fingers into the bottom edge of the rootball and pulling outwards. Doing this a few times will loosen the roots and encourage them to spread into the surrounding soil once planted. If roots are difficult to loosen by hand, make four shallow cuts into the root mass near the bottom with a sharp knife. This will promote growth into the surrounding soil.
  接下來，將根球從容器中取出，通過將手指推入根球的底部邊緣並向外拉，輕輕地梳理出可能開始圍繞花盆底部旋轉的任何根。這樣做幾次會鬆開根部，並鼓勵它們在種植後擴散到周圍的土壤中。如果用手很難鬆開根部，請用鋒利的刀在靠近底部的根部切四個淺口。這將促進周圍土壤的生長。

• Give your plant a brief soaking in a tub or bucket of water until the air bubbles disappear. Gently shake the root ball to allow excess water to drain off before positioning it in your planting hole.
  將您的植物短暫浸泡在一盆或一桶水中，直到氣泡消失。將根球放入種植孔之前，輕輕搖動根球，讓多餘的水排出。

• Planting too deeply, particularly in wet soils, will cause the roots to rot and invariably lead to failure. A good trick is to use a cane laid across your planting hole before backfilling to check the exact planting depth. If your plant sits too low, take it back out of the hole and add some soil back into the base. If it sits too high, dig your planting hole a little deeper. Again, the number one reason for rhododendrons failing is due to wet feet and this is most commonly caused by planting too deep so that lower stems are buried below soil level.
  種植得太深，尤其是在潮濕的土壤中，會導致根部腐爛並必然導致失敗。一個好的技巧是在回填之前用一根手杖橫放在種植坑上，以檢查準確的種植深度。如果你的植物位置太低，請將其從洞中取出並在底部添加一些土壤。如果它位置太高，請將種植坑挖得深一點。同樣，杜鵑花失敗的首要原因是腳濕，這最常見的原因是種植得太深，以致較低的莖埋在土壤水平以下。

 

Use a cane laid across your planting hole to check the planting depth
用一根手杖橫放在種植坑上檢查種植深度

 

• Next, start backfilling the dug soil, securing the soil around the roots with your hand as you go along. Once half filled, water well to settle the soil before continuing with the rest of the soil.
  接下來，開始回填挖出的土壤，邊走邊用手將根部周圍的土壤固定住。填滿一半後，先澆水以使土壤沉降，然後再繼續處理其餘的土壤。

• Mulch with acidic material such as pine needles, bark or conifer clippings once complete, leaving a 2 inch (5cm) gap between the mulch and the base of your plants to reduce the risk of disease. Do not stand on or compress mulch - it should be kept well-aerated rather than packed down.
  完成後，用鬆針、樹皮或針葉樹剪草等酸性材料覆蓋，在覆蓋物和植物基部之間留下 2 英寸（5 厘米）的間隙，以降低患病風險。不要站在或壓縮覆蓋物上——它應該保持通風良好，而不是壓緊。

 

Planting Rhododendrons in a mound of improved soil in very heavy clay conditions
在粘土條件非常重的改良土壤中種植杜鵑花

• If you have a heavy clay soil, plant your rhododendron in a mound of improved soil above the base clay soil. This is required because if you dig a hole in very heavy soil and fill it back with a light soil mixture, you'll effectively just end up creating a bucket in the ground made of slick clay, which will hold too much water.
  如果您有重粘土，請將杜鵑花種植在基粘土上方的一堆改良土壤中。這是必需的，因為如果您在非常重的土壤中挖一個洞並用輕質土壤混合物填滿它，那麽您實際上最終會在地麵上形成一個由光滑粘土製成的桶，該桶會容納太多的水。

 

 

 

Rhododendron Garden Care 杜鵑花園護理

 

 

Weeding 除草

• Keep your rhododendrons clear of perennial weeds during the growing season. Weeds are best removed by hand rather than using a hoe which could damage the shallow roots of your plants.
  在生長季節，讓杜鵑花遠離多年生雜草。最好用手清除雜草，而不是使用鋤頭，因為鋤頭可能會損壞植物的淺根。

 

Watering 澆水

• Rhododendrons are native to areas with high rainfall, so they are naturally suited to moist soils. They are also shallow rooting so won't compete with nearby deeper rooted plants for moisture. Watering will be required during prolonged periods of hot, dry weather in late spring, summer and early autumn.
  杜鵑花原產於降雨量高的地區，因此它們天然適合潮濕的土壤。它們的根部也較淺，因此不會與附近根部較深的植物爭奪水分。春末、夏季和初秋的長時間炎熱幹燥天氣需要澆水。

• A rough guide is to water your plants if there has been less than 1 inch (2.5cm) of rain per week. Shade-loving annuals such as impatiens can be planted around or in front of your rhododendrons as companion plants to help indicate when water is needed.
  粗略的指導是，如果每周降雨量少於 1 英寸（2.5 厘米），請給植物澆水。喜蔭的一年生植物，如鳳仙花，可以種植在杜鵑花周圍或前麵，作為伴生植物，以幫助指示何時需要水。

• Rhododendrons do not like the calcium from tap water in hard water areas as this neutralises the acidity of the soil. If you live in a hard water region, water your rhododendron plants with collected rainwater where possible.
  杜鵑花不喜歡硬水地區自來水中的鈣，因為這會中和土壤的酸度。如果您生活在硬水地區，請盡可能用收集的雨水澆灌杜鵑花植物。

 

 

Mulching 覆蓋

• Rhododendrons benefit from a generous mulch of pine needles or bark each spring. This has four key benefits:
  每年春天，杜鵑花都會受益於大量的鬆針或樹皮覆蓋物。這有四個主要好處：

1) Helps to retain moisture by preventing evaporation from the surface of the soil
1) 通過防止土壤表麵蒸發來幫助保持水分

2) Suppresses weeds around your plants which would compete for water and nutrients
2) 抑製植物周圍的雜草，這些雜草會爭奪水分和養分

3) Acts as insulation to protect the roots from harsh frosts in the winter
3）起到隔熱作用，保護根部免受冬季嚴酷的霜凍

4) Provides a gradual stream of nutrients to your plants as it decomposes
4) 在分解過程中逐漸向植物提供養分

• Leave a 2 inch (5cm) gab between the mulch and the base of your plants to reduce the risk of disease.
  在覆蓋物和植物基部之間留出 2 英寸（5 厘米）的間隙，以降低患病風險。

• Do not use weed suppressing matting or gravel which prevents air from reaching the roots and impairs drainage.
  不要使用雜草抑製墊或礫石，因為它們會阻止空氣到達根部並損害排水。

 

Feeding 喂養

• Rhododendrons and azaleas should be fertilised sparingly because excessive applications can burn the roots.
  杜鵑花和杜鵑花應少量施肥，因為過量施肥會燒傷根部。

• Sprinkle some slow-release ericaceous plant food around the base of your plants in early spring, just as the flower buds are starting to swell. As always, follow the instructions on the package but 70 grams (half a handful) per square metre is about right.
  早春，當花蕾開始膨脹時，在植物基部周圍撒一些緩釋的杜鵑花植物食物。與往常一樣，請遵循包裝上的說明，但每平方米 70 克（半把）就比較合適。

• Avoid feeding rhododendrons with bone meal as it contains too much calcium.
  避免給杜鵑花喂骨粉，因為骨粉中鈣含量過高。

 

Feed rhododendrons with slow release ericaceous plant food
用緩釋杜鵑花植物性食物喂養杜鵑花

 

Pruning 修剪

• Rhododendrons do not require any pruning other than to remove any dead, damaged and crossing branches.
  杜鵑花不需要任何修剪，除了去除任何枯死的、受損的和交叉的樹枝。

• The only other reason you might need to prune is to reduce the height and spread of your plants to within required bounds. It is much better if you can check the space you have available and choose a variety with an appropriate eventual height and spread at the outset because if you do need to prune an established bush heavily, it may not bloom again for two to three years.
  您可能需要修剪的唯一其他原因是將植物的高度和蔓延降低到所需的範圍內。如果您一開始就可以檢查可用的空間並選擇最終高度和分布合適的品種，那就更好了，因為如果您確實需要大量修剪已建立的灌木叢，它可能在兩到三年內不會再次開花。

• If you need to reduce the size of your plants, prune after flowering has finished in the spring. Do this by making clean cuts using a sharp pair of secateurs. Feed with a slow release ericaceous plant food after cutting your plants back, if you haven't already.
  如果您需要減小植物的大小，請在春季開花結束後進行修剪。通過使用鋒利的剪枝器進行幹淨的切割來完成此操作。如果您還沒有修剪植物，請在修剪植物後喂食緩慢釋放的杜鵑花植物性食物。

 

Deadheading 死頭

• Deadhead spent flowers once they have faded to help encourage a second flush of blooms. Deadheading also keeps your plants looking tidy and will prevent seed production once flowering is over, so your plants focus their energy on developing fresh leafy foliage instead.
  一旦花朵凋謝，枯萎的花就會幫助促進第二次綻放。死頭還可以讓你的植物看起來整潔，並且在開花結束後會阻止種子的產生，因此你的植物將精力集中在長出新鮮的綠葉上。

• Remove flowers carefully as next year's flowering buds are immediately below the current season's flowers and if you cut them off by accident you'll have no display the following year. Do this by snapping off spent flower stalks by bending them over until they break away.
  小心地摘下花朵，因為明年的花蕾緊鄰當前季節的花朵下方，如果您不小心將它們剪掉，那麽來年就無法再展示了。通過將花莖彎曲直至折斷，將花莖折斷。

 

Deadhead rhododendrons with loppers or secateurs
死頭杜鵑花與剪枝器或剪枝器

 

Cold Protection 防寒

• Rhododendrons are frost hardy in most of the UK with evergreens normally only requiring protection during severe winters. This can be achieved by wrapping a few layers of horticultural fleece around your plants.
  在英國大部分地區，杜鵑花都具有耐寒性，而常綠植物通常隻需要在嚴冬期間進行保護。這可以通過在植物周圍包裹幾層園藝羊毛來實現。

 

Problems, Pests and Diseases
問題、害蟲和疾病

 

Moisture Issues 水分問題

• Leaf drop - leaves falling to the ground following a period of dry weather. Usually proceeded by the leaves starting to droop down and roll up.
  落葉- 經過一段時間的幹燥天氣後，樹葉掉落到地上。通常，葉子開始下垂並卷起。
• Bud blast - if your rhododendrons fail to flower successfully, the most likely cause is a lack of moisture the previous summer when the buds were starting to form. Dry conditions at this time will cause buds to fail or partially form then drop off.
  花蕾爆發——如果你的杜鵑花未能成功開花，最可能的原因是前一個夏天花蕾開始形成時缺乏水分。此時的幹燥條件會導致芽失敗或部分形成然後脫落。
• Recommended Solution: Mulch to help retain moisture and water regularly during prolonged periods of hot, dry weather.
  推薦的解決方案：在長時間炎熱幹燥的天氣期間，覆蓋物有助於定期保持水分和水分。

 

Insect Issues 昆蟲問題

•  Vine weevil - insects that can infest your plans and destroy the leaves. They develop from grubs which eat the roots.
  藤象甲蟲- 可以侵擾您的計劃並破壞葉子的昆蟲。它們是由吃根的幼蟲發育而來的。

• Caterpillars - can infest rhododendrons and will munch through particularly large leaved varieties quite quickly.
  毛毛蟲- 可以侵擾杜鵑花，並且會很快咀嚼特別大的葉子品種。

• Leafhoppers - another form of insect that suck sap out of your plants, causing a pale mottling on the foliage.
  葉蟬- 另一種昆蟲，會從植物中吸取汁液，導致葉子上出現蒼白的斑點。

• Scale insects - suck sap from your plants and excrete a sticky honeydew substance which often leads to the growth of black, sooty moulds.
  介殼蟲- 從植物中吸取汁液並排出粘性蜜露物質，這通常會導致黑色、煤煙狀黴菌的生長。
• Recommended Solution: Treat with a bug killer spray.
  推薦的解決方案：使用殺蟲噴霧進行處理。

 

Fungus Issues 真菌問題

• Powdery mildew - a fungal disease causing a white or yellowish dusty coating over foliage, flowers and stems.
  白粉病- 一種真菌病，會在葉子、花朵和莖上形成白色或淡黃色的灰塵塗層。

• Rust - one of the most common of garden diseases characterised by orange, yellow or brownish spots on leaves. Usually seen from mid- to late-summer and autumn.
  鏽病- 最常見的花園病害之一，其特征是葉子上出現橙色、黃色或棕色斑點。通常出現在仲夏末和秋季。

• Petal blight - another form of fungal disease that develops in flowers and is brought on by moist, damp conditions. Identified by brown flecks on petals that rapidly merge to form blotches and, if left untreated, will continue to engulf your flowers until they die and fall to the ground.
  花瓣枯萎病- 另一種在花朵中發生的真菌病，由潮濕的環境引起。通過花瓣上的棕色斑點來識別，這些斑點會迅速融合形成斑點，如果不加以處理，將繼續吞噬您的花朵，直到它們死亡並掉落在地上。
• Recommended Solution: Treat the affected areas with a fungus killer. If your plants have suffered from petal blight in a previous season, we recommend using a fungus killer as a preventative measure once a week from when the flowers open. Otherwise, by the time you've actually spotted the issue it'll probably be too late.
  推薦的解決方案：用真菌殺手治療受影響的區域。如果您的植物在上一季節遭受過花瓣枯萎病，我們建議從花朵開放後每周使用一次真菌殺手作為預防措施。否則，當您真正發現問題時可能為時已晚。

 

 

Comments  評論

 

Gunvant Patel 岡萬特·帕特爾24 Mar 2024, 09:09 2024 年 3 月 24 日，09:09

A very detailed and well explained useful information on growing rhododendron. As I am considering planting these evergreens this April I will definitely follow these guidelines as best I can. Very grateful to the author, a big thank you.
關於種植杜鵑花的非常詳細且解釋清楚的有用信息。當我考慮今年四月種植這些常綠植物時，我一定會盡我所能遵循這些準則。非常感謝作者，非常感謝。

Sawyer 索耶30 Aug 2023, 16:49 2023 年 8 月 30 日 16:49

A thousand times better than any other explanation I've ever gotten to grow these.
比我種植這些植物所得到的任何其他解釋都要好一千倍。

Colleen  科琳12 May 2023, 22:01 2023 年 5 月 12 日 22:01