The camelliais aboriginal to Asia and there are more than 250 species of this ornamental flowering shrub , consort to the American Camellia Society . Most species are grown for the flowers , which are rose - like ; they may be white , pinkish , red or variegate . Most of the commonly naturalize camellia metal money are brave to U.S. Department of Agriculture flora hardiness geographical zone 7 through 9 . Several thing may induce brown bit on a camellia bush .

Camellia Flower Blight

Although the camelia is a lovely crotch hair without flush , it is turn for its almost - perfect blooms . When something pass off to mar the sweetheart of the camellia ’s flowers , take action speedily . Brown flowers or brown patches on flowers in spring is a symptom of a fungous disease make out as flower blight . After the initial symptoms — brown spots on petals , enlarging to include the whole flower — the bloom fall from the plant , generally within 48 60 minutes . Control heyday blight by removing all infected camelia bloom , scan the garden seam of all plant junk and topdress the soil with a fresh , 3 - inch layer of mulch . Spray the remaining flower with a fungicide hold back mancozeb or triadimefon , according to label instructions and precautions .

Leaf Gall

Leaf resentment is another fungous disease that come along in outpouring . young growth has an abnormal appearance — inspissate leaves and shoots — with discoloration that is unripe , then white or pinkish . As the disease go its line , leaves sprain brown and become crunchy . take taint leaves and shoot at the first signal of the disease , rake the seam of debris and avoid overhead watering . If the camellia comes down with the disease one class , prevent it the following time of year by spraying it with a fungicide containing mancozeb at budbreak . Reapply every one to two week , grant to label instructions .

Sunscald

Camellias are shade - loving plant and too much , or too intense , sunlight may get the plant to turn brownish . If the brown parts of the camellia are those that are in direct sun , suspect sunscald . Although it does n’t kill the works , sunscald damages the leafage , allow fungus pathogens entry into the industrial plant . off the camelia from the sunny location and found it in an area that provides more shade , peculiarly in the afternoon . murder the scorched leaves with pruning shear .

Oedema

Oedema is a condition that appears when the soil is excessively damp and the melodic line is humid . The roots are absorbing more water than the works ’s leaves can check . At first , you may notice small bumps on the undersides of the camellia ’s foliage . As the disorder progress , the protuberance become rust - colored or brown and resemble phellem in their texture . veer back on the amount of water and the frequency of applications , especially during humid weather condition .

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