Avoid overhead irrigation in the spring. It’s making its way south and causing a lot of damage to viburnum, devouring every leaf on a tree. Powdery mildew: White fungal growth forms on the upper surface of leaves. tomentosum) If so, the leaves do droop naturally. Snowball bush (Viburnum opulus) Arrowwood (Viburnum dentatum) This variety can tolerate partial shade. H x S: 2.5m x 1.5m. With powdery mildew, young viburnum leaves and shoots develop a white to light gray fungus covering on leaves. The viburnum leaf beetle is an invasive bug from Asia and Europe that was introduced to North America in the late 1970s in Canada. The middle one lost several major branches over the winter, the leaves are drooping and some are turning yellow. Asked April 26, 2019, 9:41 AM EDT. It has attractive blue berries in the autumn which contrast with leaves that change to a dramatic purple-red at this time of year. ‘Onondaga’ is a lovely cultivar, with red-bronze young foliage, that greens up as it matures. Since the mildew spores can survive through the winter, gardeners should clean up any fallen leaves or plant debris regularly. Your viburnum bushes are deciduous, which means they will drop their leaves each fall. A fungicide containing mancozeb or chlorothalonil is effective against downy mildew. The disease can cause leaves to drop off the viburnum. Does it look like this one Doublefile Viburnum (Viburnum plicatum var. My Chindo Viburnum bush has many yellow, brownish leaves. Most shrubs and perennials will not grow significantly the first year they are planted, at least there won’t be much visible growth. It reaches 6-15 feet (2- 4.5 metres) tall and has white flowers. Your plant looks fine to me. As with any newly planted shrub, tree, etc., it need to be well watered regularly for the 1st year or until the roots are established in the new location. Powdery mildew can show up on leaves, but don’t spray with sulfur-based sprays lest you damage the leaves. Powdery mildew, a viburnum disease caused by a fungus, tends to develop when the weather delivers warm days, cool nights and high humidity. ... Mow leaves on grass (if not raking to beds or compost) to break them down; Last year, two started not to look so good: leaves dried up on half of each bush but the other halves continued to look vigorous. I have three leather leaf viburnums in my yard -- located with 30 feet of each other. Some get as tall as 20′, while others are shorter. Plasmopara viburni: Rake and destroy fallen leaves in the autumn. Rain helps to slow this viburnum disease, which is always more severe on plants sited in shade. Your plant looks fine to me. This year all 5 flowered, but all 5 have VERY tiny leaves. Two of them are absolutely thriving and healthy. Drooping Leather Leaf Viburnum. Apply a fungicide as soon as any disease is observed. If the branch and leaves seem to be unaffected after that time, you should be able to use sulfur on the plant.) I have 5 large full-gown viburnums planted in full sun. It’s a non-native, but very drought-tolerant, and works in shade to sun, as do most viburnums. The powdery mildew fungus prefers wet conditions and cool or warm weather. Their growth rate should increase after the first year. Butterflies enjoy the blooms. Although the majority of the plant does have the green leaves, there seems to be enough of the discolored leaves to let me know there is something wrong with the plant. Select the one that’s right for your space. Tips for growing viburnums. Light- colored fungal growth sparsely covers the spots on the underside of the leaf. Pictured is Viburnum tinus ‘Spring Bouquet’. Overall, they're looking sparse. 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