Stunt Nematode – These azalea pests attack the feeder roots and cause azalea plants to become stunted and yellow. Why? This process duplicates the coloration normally seen later in the year. Leaves. Now, they're both almost completely yellow… Azaleas are a joy to see in any garden, but have you ever encountered the frustrating problem of the leaves turning pale green to yellow. If your plant is dry – you can stick your finger into the soil to check it – try to get it on a regular watering schedule. Right before the leaves fall off the plant, they will turn yellow. Azalea lacebug Upper surface of leaves has a gray, blanched, or coarse-stippled appearance. Leaves roll and droop; no insects evident: Water stress Canker Root problems: II. The yellow leaves on your azalea are concentrated in one part of the plant while the rest of the shrub looks green and healthy. A while back, I noticed that two bushes adjacent to each other had some yellow leaves, but I didn't think much of it. Q: The leaves on my azalea are turning yellow. Removal of affected plants may be necessary. There could be several reasons for those azaleas turning yellow. Leaves eaten or chewed at margins in half-circle pattern: Black vine weevil: D. Leaves distorted: 1. This symptom tells me that the root system is impaired or there is a marked pH difference on that side of the plant. Affected leaves may also curl up and drop. Q. Azalea Spotting - I planted 5 gallon-sized azaleas last spring. Most garden plants will require a pH of 6.5 - 7 for strong healthy growth which is just on the acid side of neutral Azalea Leafminers – This azalea plant pest generally “mines” between the upper and lower surfaces of leaves causing brown blisters or yellowing on the leaves. Q. Azaleas With Yellow Leaves - I planted 13 azaleas in my front yard about 5 months ago and now the leaves are turning yellow. Azalea leaves naturally turn these colors before they fall. There could be several reasons for those azaleas turning yellow. Would a soil pH problem cause this? I am using a powdered, water soluble fertilizer product that says it acidifies the soil and adds iron to the soil. Q. Azalea With Yellow Leaves - My azalea has been extremely healthy all summer but now has lots of leaves turning yellow and falling off. Branches and Twigs Affected: A. Terminal buds and leaves turn brown: 1. Too much sun dries out the soil and can burn the tender leaves of the azalea. HELP!! Other signs that your plant is not getting enough water are leaves that are curling inward, drooping down, … What's wrong with my azaleas? Chlorosis How much should I use to increase the soil’s acidity? Leaves thickened or fleshy, turn pale green or whitish: Leaf and flower gall (Exobasidium) 2. pH is the measured alkalinity or acidity of a soil. The undersides of the leaves become discolored by excrement and cast skins. Repeat application every 10 days until control is obtained. Azalea leaves and flowers tend to wilt for three reasons: Azaleas have shallow roots which leaves them vulnerable to drought which results in wilted leaves and flowers. The first year the leaves were dark green, but last year they started to turn yellow shortly after flowering. If you have been experiencing very dry weather, this has encouraged the azalea to shed its oldest leaves. Many who have ever grown Azaleas will know that they like an acid pH. I planted azaleas two springs ago. Soil that drains too slowly, or is naturally boggy will cause the azalea to have root rot. A: “Yellow leaves” on azaleas is a common problem. Spray undersides of the leaves with Malathion, dimethoate (Cygon), or acephate (Orthene).
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