Arlene, ello Cuz, glad that you are finding your way around GOY sorry taken so long to reply on here, not been on for a few days.... mmmmm you know what i have had something very simular on 2 of my Rhodo's, and like yourself have others growing around it that look fine... the one in the front garden has had it, had to dig it out and dispose the one in the back seems to have picked up ok... i am thinking one of two things wronge with mine.... 1) virus 2) too much sun.... in my front garden it gets it all day... and i think the brown splotches i had were proberly due to scorching... this may sound obvious but what time of day do you water Andy? Add another photo The site gets sun from about 2pm onwards in high summer, otherwise is shaded. The plant will start exhibiting clear symptoms as the leaves will begin to wilt and the health of the plant will suffer drastically. symptoms are pale spots on upper leaf surface, with corresponding brown/grey patches underneath: Control with fungicide from late May onwards. Drought could have been a major factor in your Rhododendrons brown leaves. I suppose the oddest thing is that the rhododendron next to it is doing fine, albeit it's not the same variety. Added more recently was some Miracle-Gro slow release ericeaous pellets, which it says on the pack incorporate during March to September at three month intervals. Any advice is greatly appreciated. « I have a wonderful clematis with small stiff purple bells, growing in a pot. Add another photo. Rhododendron is a genus of plants with more than 850 species, from ground covers to shrubs and trees. Other causes: There are some fungi that periodically affect Rhododendrons. Filtered light is best, or morning light with afternoon shade. purpose composts from garden centres are slightly alkaline. Maybe the pH level is off? Additionally, over-fertilization often results in an increased likelihood of infection. Best of luck! Note: the other rhododendron, which is planted in the same soil about 1 metre away, is doing fine, so it can't be the soil acidity can it? westes Zone 9a California SF Bay. This spring’s bloom was the best in a long time. During Summer, it is recommended … Cause Leaf scorch on rhododendrons is a response to stress. When you plant them, dig in plenty of Their hardiness ranges vary by species. Poor drainage and overwatering are common causes of browning leaves and stems. I wouldn't use tap water at all if you can help it and what ratio white vinegar did you use? The infected parts are invaded with brown spots that expand and spread from the leaves and to the stems to infect the established rhododendron leaves. thick mulch of leafmould or peat, but if your own compost contains a Pests and diseases are some other reasons for the browning of the leaves. In this case crust that sheds water and stops it reaching the roots. What causes it? organic matter such as leafmould, compost from your own heap or peat Rhodies Preventative Practices Disease prevention practices will prevent the spread of phytophthora fungi. Essex, United Kingdom . Some shade is also a good idea, but My Rhododendron Is Losing Leaves and Is Crispy. There are several factors that can cause rhodie leaves to turn brown. I have a rhododendron named "Seaview Sunset" where the leaves are starting to turn brown but only at the tips, almost like they are burned. Do you think I can make the plant recover? Rhododendrons planted in too much sun can show drought symptoms even if they are watered. I don't have a water butt and nor do I have the room for a water butt, so I cannot collect rainwater. soil, as well as restoring some life to it to make up for the ravages Prolonged saturation leads to diseases that kill an entire plant, not just its leaves. Newly planted rhodies should be watered in well, and will require more attention in their first season than well-established rhodies. Getting the right type of water is a problem. Spots on rhododendron leaves. Discovering the cause will make treatment options much more effective, and employing basic preventive practices will enable you to avoid the problems in the future. Occasionally I use Miracle-Gro soluble plant food for ericaceous plants, say once a fortnight. Rhododendron Leaf Problems. I noticed it after the heavy snows we had in Redmond this November. See the picture and the leaves are browning on the edges. Any rose fungicide will do: myclobutanil (systhane), fungus fighter, roseclear etc. If we have to water the veggies. I have three rhododendron plants that were planted last spring when they were 1 or 2 years old. Why are my rhododendron leaves turning brown? In general, though, this fungus affects newer foliage with brown spots at first, followed by more spots on older foliage and stems. The leaves could also turn brown because of a lack of water. The This will help retain moisture in the However, in that case I'd expect the browning leaves to be on the outermost leaves. If you can't get enough http://www.extension.umn.edu/garden/yard-garden/flowers/azaleas-rhododendrons-for-minnesota/. As with fertilizing any plant, applications of fertilizer should occur after soil tests confirm a definite need. As for the quantity of vinegar I was adding about a tablespoon to a 5 litre can. The plant is about 7 feet tall and 6 feet in diameter. Waterlogged roots suffocate and shut down, leaving no avenue to replace water lost to drying winds and sunlight. This info is from another site:-. Rhodies do need plenty of water, especially in hot dry weather and foliage in the evenings is also a good idea, especially if the soil ~It doesn't look too happy! 2 years ago. Many leaves on my rhododendron have turned brown. Late afternoon sun is the most damaging. Now on one of the plants the leaves are starting to not look good. damage the surface roots. Click to see full answer. Eventually, leaves will dry out and fall off. Maybe I need to water more? I have a wonderful clematis with small stiff purple bells, growing in a pot. You can buy pure water~not de~ionised from a pet shop dealing with fish. Rhododendrons grow well if fertilized before they bloom, and immediately after they bloom. hot, dry weather I would water at least every ten days. In really On the watering front I rely on rain but in a few drier spells I have used tap water with some vinegar added to it (I read this was a good thing to do???). I didn't realise they needed quite so much water. As stated by R.K Jones and D.M. Don't plant them any deeper than they By Manwithspear. Grows on You is a community for gardeners. A deep watering twice a month in summer will protect rhododendrons better than frequent light sprinkles grazing the top of the roots. I have a standard holly bush which got very poorly being watered with tap water when I ran out of rainwater but was totally rejuvenated by putting it into a large pot of ericaeaous soil. appears moist but the plant is still wilted. It is not uncommon to see this happen on rhodies here in Central Oregon. Drought could have been a major factor in your Rhododendrons brown leaves. Now the leaves are turning a rust color, curling upward, and falling off. This kind of damage is most likely due to unfavorable environmental and weather conditions. Remember to use acid The warmer the weather, the faster the spread. Why rhododendron leaves turn brown? If a more significant infection is underway, purchase a fungicide safe for rhododendrons at a local gardening supply store and cover the plant thoroughly. Flower buds go brown and die but remain attached; Later, the buds may turn silvery grey before becoming covered in small black bristles; Powdery mildew: On evergreen rhododendrons, actual growth of the fungus on the lower leaf surface can be hard to detect, but infection tends to cause pale green, reddish-purple or yellowish patches on the upper surface
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