For more info on Buxus Blight click here. Similar symptoms occur on buxus or box, which is usually grown as a hedge or topiary, however tis is usually caused by a fungal disease generally known as Buxus Blight. These shrubs can grow up to 8 m tall if not trimmed. A Griselinia Hedge can be pruned in the summer months – July to September in the UK – and depending on your topiary tastes, you can use hand or machine shears to achieve your goals. Premature brown leaves are an indication of a problem with your shrub. Griselinia makes a great hedge in a seaside garden. Olearia macrodonta - New Zealand Holly It is a relatively strong plant and can withstand a hard pruning if the needs arise. PESTS : 1. › Griselinia Hedging ... so we've put together a guide on the most common problems gardeners face from pests and diseases in the UK. Plant 2 ft apart for a solid hedge. Read More Griselinia has light green leaves of oval shape. As they feed they can spread diseases, weaken plants, and increase the risk of getting Sooty Mould. I live near Stonefields and alot of the griselinia hedges in that suburb (2-4 years old) are dying, plus a little gem magnolia hedge - dead. Your plant may suffer from a fungal or bacterial pathogen. Well you would not be the only one to have a dying griselinia hedge in Auckland due to the dry weather. Prevention. How to cut and prune a young Griselinia hedge using stihl long reach hedge cutters. My Griselinia hedging seems to have taking a beating during the latest cold snap. Root rot most commonly becomes a problem after trees have been water stressed. I suggest you look at planting a laurel hedge in this shady area. Griselinia - diseased? Frost pockets are usually areas of ground lower than or shadier than their surroundings, these receive lower temperatures and frost often lingers long enough to damage the spring leaves and flower buds. Aphids. Problem solving. Aphids are small sap sucking insects. This evergreen hedge is very fast growing. › Problem solving. _____ Gardening books. All the leave are either turning brown then black and falling off. Plant Griselinia away from frost pockets. Why choose Griselinia littoralis for your landscape?. Really don't want to have to replace it all this year. Is it totally dead or can it be saved. Last year, I started a new hedge (there may have been a blackthorn there in the past) in my front garden, about 70 plants in July and another 50 in October. Not surprisingly aphids are the most common pest you will encounter in your hedge, there are over 500 species in the UK. Popularly known as New Zealand broadleaf or New Zealand privet, Griselinia littoralis is a fantastic alternative to common hedging varieties. Photo by wallygrom. How to Cure Brown Leaf Disease in Shrubs. Evening all, just looking some advice on whether to give one plant more time? 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