Red Robin problem

Skips · April 2014

My Red Robin looks healthy enough but several leaves have black patches on them. I first noticed it in the late summer/autumn of last year. What is the black patch thing, and is there anything I can do about it?

Skips · January 2014

Many thanks for your help. Ok it seems that I shouldn't be too concerned.

I am not an experienced gardener, so I appreciate the tips you've given me, particularly the time to prune as that would have been my next question for the forum!! Should I prune once per year only, early summer?

Skips · January 2014

OK, I'll do that.

Many thanks.

Lion S · January 2014

The black patches in Photinia leaves are caused by Entomosporium maculatum, a fungal leaf spot disease. It's is very common and is not harmful to the shrub. The main reason of these spots occurring, is the leaves remaining wet over a long period. It doesnt look very nice though.

Plants in a sheltered spot are more prone to leaf spots, as well as new foliage. Pruning during the growing season will encourage new growth. Mature leaves are more resistant to leaf spot.

Rake up and discard fallen leaves, and remove infected plant material. Apply fresh mulch around plants to cover any leaves that were missed. You could also try underplanting with low growing perennials, such as catmint.
Provide sufficient air circulation. This often means thinning out a few plants in a hedge.
Avoid wetting the leaves when watering. Splashing water spreads the fungus.
Avoid summer fertilization that will promote new growth late in the season.

If nothing seems to work, you can try spraying with a fungicide just before and during new foliage is emerging. If that doesn't make any difference, I would be inclined to remove Red Robin althogether.

I hope this will help.

Ant Ryan · April 2014

My red robin leaves appear to be turning black, and going crumbly on the ends as if they have been burnt,

can anyone offer any advice ???

Red Robin problem

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