Rhododendrons originate mainly from the Himalayas where about 600 different Rhododendron species can be found. Yellow leaves on rhododendron. So why has my rhododendron got yellow leaves? Broadly oval leaves are silvery at first, maturing to deepest green, and are brown felted beneath. Why Is My Rhododendron Drooping? When the leaves are yellow but the region along the veins remains dark green, the plant likely suffers from chlorosis, which is … During a cold snap, your rhododendron’s leaves may droop, but should usually recover when milder weather returns. Is it dying? These range from those in the Tender section at lower elevations around 2500 metres. Big Leaved Species with their massive leaves up to 75cm long, grow in conifer forests around 3000metres. Blooms mid to late spring & reaches roughly 4 feet tall. Rhododendron 'Catawbiense Grandiflorum' is a bushy, dense, evergreen shrub. Evergreen, dome shaped rhododendron of neat, compact habit. The leaves have a chemical called grayanotoxin that can cause anything from gastrointestinal distress to death. The shiny, rich-green leaves are paler green underneath, providing year round colour and structure in the garden. Produces dome-shaped trusses of 10-12 flowers. Diagnosing Rhododendron Problems Yellow Leaves Chlorotic (pale) leaves are a sign of low fertility for all types of plants, not just rhododendrons. Rhododendrons which are not happy tend to show this by their leaves turning yellow. In late spring has funnel shaped pink flowers that fade to near white., May The Victoria Rhododendron Society adds that older leaves naturally turn yellow, and they are replaced every one to three years. Viewed 1k times 3. Asked January 15, 2019, 3:09 PM EST. Yellow leaves could be a sign of stress as a result of soils that are alkaline rather then acidic. This disease, caused by the fungus Glomerella cingulata, results in rounded spots on the leaves.Although it’s unsightly, leaf spot is only a significant problem on poorly growing or unhealthy plants, which might end up dropping a substantial number of leaves. Fully hardy. Azaleas and rhododendrons require acidic soils and will thrive in soils between pH 4-6 with pH 5.5 considered ideal (pH 7 is neutral and a value above pH 7 is alkaline). of the leaf. However, deer seem to graze on young plants or small-leaf varieties of both rhododendron and azaleas without negative results. Flowers are openly funnel-shaped with wavy edges, light yellow, edged with½" of red, outside mostly red with some light yellow near the base. 2017, 1st june Soon after planting my rhododendron, leaves are turning yellow with black/brownish patches. Ask Question Asked 3 years, 3 months ago. Can I do anything about it? There are several reasons that this may happen. In the past two years the leaves are yellowing and also something is eating the leaf margins, see other photo. Reasons include: because they are too wet, too dry, planted too deep, starved (needing feeding), soil too alkaline, or so il … They avoid only those plants with large leathery leaves or leaves with indumentum (a fuzzy underside). Large trusses of mauve flowers with yellow-brown markings at the throat are borne in … Active 3 years, 2 months ago. Edit (2017, 12th july): I … I can't recall the variety but the flowers are creamy pale yellow and bloom in early May, see photo. Leaves are elliptic, flat, semi-glossy & dark yellowish-green. Has an upright, dense growth habit. I have a 3 year old Rhody from Tsugawa nursery. Why Have The Leaves On My Rhododendron Turned Yellow? Don’t panic if the spring growth on your rhododendrons looks a little pale, however, because it is natural for the foliage to hold its “spring green” color for a … Yellowing rhododendron leaves. 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