How to revive red robin hedge?

Hi, my hedge (red robin, not very sure) looks like only growing at top but not the sides. The trunk turns white and the branches are very dry. What may cause this and what can I do to revive the hedge? I really appreciate it if anyone could share some ideas.

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EricL

Hello @Tim8152

Welcome to the Bunnings Workshop community. It's sensational to have you join us and thanks for sharing your question about your hedge.

Your hedge, which appears to be a Photinia (possibly ‘Red Robin’), is showing signs of poor lower growth, dry branches, and white patches on the trunk. These issues are quite common with this type of plant, and there are several possible reasons for its condition. One of the most likely causes is a lack of light on the lower branches. Photinia naturally grows tall and, if not regularly pruned, the upper foliage shades the lower sections, causing them to become sparse and woody over time. This can make the hedge appear healthy at the top while struggling at the base.

Another possible cause is the white patches on the trunk, which could be either lichen or powdery mildew. Lichen is harmless and typically grows on slow-growing or stressed plants, while powdery mildew is a fungal disease that weakens the plant and can cause leaf drop. If the branches are very dry and brittle, drought stress or poor soil conditions may also be a factor. Compact soil, insufficient watering, or a lack of nutrients can contribute to weakened growth, leading to a bare and unhealthy-looking hedge. Additionally, fungal diseases like Entomosporium leaf spot are common in Photinia and can cause progressive leaf loss, further weakening the plant.

To revive the hedge, start by pruning the top and selectively cutting back some taller branches to allow more sunlight to reach the lower sections. Regular trimming encourages bushier growth and prevents further thinning. Improve the soil by applying a slow-release fertilizer suitable for hedges, ensuring the plant gets essential nutrients. Keep the soil moist but well-drained and add a layer of mulch around the base to retain moisture and improve soil quality.

If disease is suspected, a fungicide suitable for hedges from Bunnings, such as a copper-based spray or neem oil, can help prevent further fungal spread. Checking the root health and aerating compacted soil with a garden fork can also support recovery. If the hedge is severely damaged, a hard prune in early spring may be necessary, though it could take a season or two to fully regrow.

If you need further assistance, please let us know.

Eric

Tim8152

https://www.workshop.bunnings.com.au/discussion/comment/48854#Comment_48854

Hi Eric,

Thank you for your information. It’s really helpful.

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