Why Have Some Leaves On My Contoneaster Lactus Hedge Turned White?

Question

In last few days I’ve noticed some leaves (particularly at bottom of hedge) on my 6 foot cotoneaster lactus hedge have turned/are turning white. Hedge is 8 years old and has always grown well. We live by the coast but hedge is sheltered by the house.

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Answer 1

This looks to be an iron deficiency. I would check for deficiency or pH swings, which can cause deficiency-like symptoms.

Here are some articles that will help:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm

https://www.gardeningknowhow.com/ornamental/shrubs/cotoneaster/how-to-grow-cotoneaster.htm