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Hydrangea serrata 'Blue Billow'

Hydrangea serrata 'Blue Billow' (Hydrangea serrata)

It's hard to find hydrangeas that bloom reliably in Michigan but this one has bloomed well every year I've had it. The fall color is beautiful too

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Nice ,looks very compact is that due to pruning

12 Jul, 2014


mum had a hydrangea that was part blue on one side because there were nails buried in the ground under it - she said that was the only way to get blue flowers on them, but you've proved her wrong

13 Jul, 2014


This hydrangea is more compact but I don't usually prune it. I have grown a few from cuttings and will cut off dead stems in Spring but mostly I leave hydrangeas alone. Most of them have the top 1/4 to top 1/2 die back during winter because they are not fully hardy here. The buds covered in mulch or snow survive and that is it. This is by far the hardiest hydrangea I grow and I have never seen die-back on it.
The reason it is blue is I have treated it with Aluminum sulfate to acidify the soil and make sure there is Aluminum available. I treated it last year and probably won't have to do it again for a while. Hydrangeas need Aluminum for blue flowers, making the soil acidic makes it possible for the plant to use Aluminum.

15 Jul, 2014

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Pictures by rkwright
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This photo is of "Hydrangea serrata 'Blue Billow'" in Rkwright's garden

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