A bit of crowdsourcing here: GM is curious to know if other gardeners around Georgetown have found the dirt here to be unusually alkaline?
GM likes to garden in his modest little backyard. One thing he particularly like to grow are hydrangea. And he especially likes to grow perfectly blue hydrangea flowers.
As you may or may not know, hydrangea flowers derive their color from the acidity in the soil. If the soil is acidic, the flowers turn blue. If the soil is base or alkaline the flowers turn pink. You can buy soil additives to nudge the acidity one way or the other.
GM has bought and used additives to add acidity (i.e. to turn the flowers blue). It works for a bit, but unless GM keeps adding a ton of the additive, the flowers seem to eventually turn pink.
And walking around Georgetown, GM can’t help but notice that most hydrangea bushes he sees are mostly pink colored. Maybe it’s just a common preference, but it has GM wondering: is the soil around here just naturally alkaline? Any gardeners want to weigh in?