[97] Mahonia Red Leaves

The upper side of the leaves turns yellow or brown and may fall off prematurely.

[94] Mahonia Red Leaves Liste. 18 mar 2010. Mahonia leaves spiny edges offer no protection against a group of leaf feeding insects. Mahonia nervosa cascade long leaved or dull oregon grape this oregon grape is lower growing evergreen shrub topping out at about two feet.

Yellow orange or reddish masses of spores form on the underside of the mahonia leaves. Gray mold caused by the fungus botrytis forms a gray fuzzy mass on affected areas. In spring racemes of cheerful bright golden yellow flowers appear just above the leaves.

In large numbers scale insects mealybugs thrips and whiteflies discolor curl or distort mahonia foliage. Mahonia rust and other fungal diseases cause leaf spots. If the centre of the plant is congested prune it as suggested above to allow better air circulation.

Have all of them changed colour or are the majority still green evergreens do lose leaves just not like deciduous shrubs. Why has our mahonia charities leaves turned yellow red and orange. Spray with a fungicide designed to combat rust on plants.

The only one i can find grows to about fifteen feet tha is the leatherleaf mahonia or mahonia bealei that has some leaves that are red but also the center of the leaves are eferesance in march and this week it is plant of the week 14 nov 2009 the mahonias that grow wild around here all turn red in the autumn.