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Old 27-03-2007, 07:28 PM posted to uk.rec.gardening
Space[_2_] Space[_2_] is offline
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First recorded activity by GardenBanter: Mar 2007
Posts: 87
Default Keeping hydrangea blue


"Geoff" wrote in message
...
The plant might stay blue for a few years.


Geoff, a serious question - neither my husband or I drink tea, we are
freshly ground coffee drinkers, would that do?


I found my narrow band indicator papers and just as my wife was about to
start a fresh brew, I managed to rescue to the last lot's grouts. I
pressed a piece of pH 4 to 6 paper in them and found the pH to be between
4 and 4.5. Anything less that pH 7 is considered to be acidic. So,
coffee grouts will add acidity to the soil with the added bonus of keeping
the hydrangeas awake!!!

I do not like tea either!

Geoff


Starbucks give away pre-packed bags of old coffee to be used within the
garden