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