Ask a Question forum: Hydrangea problems

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Apr 22, 2017 4:33 AM CST
Recently purchased macrophylla hydrangea's. Planted them in containers with John Innes No 3 but now the leaves are changing colour
Thumb of 2017-04-22/visitor/15dfef
Thumb of 2017-04-22/visitor/63a4b9

Name: Sue
Ontario, Canada (Zone 4a)
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Apr 22, 2017 5:53 AM CST

Since you used John Innes I assume you are in the UK? The purpling is most likely phosphorous deficiency, which could mean either a shortage in the pots or something like cold weather interfering with uptake. Have you fertilized with anything yet? If so, did it have phosphorous (the middle number in the analysis?). They get to be big plants, is there any way you can plant them in the ground instead of in pots?

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