Water VesselWednesday, September 22, 2010
My hydrangea flowers (which I didn't know the colour earlier) turned out to be light pink and purple...
It's true that Hydrangea colour follows the pH level of the soil. The flower bracts will be pink when soil pH is between 6.0 and 7.0. To get blue flowers, the soil's pH has to be between 4.0 and 5.0. I tested the soil and the reading show that the current soil's pH is about 6.5.
About two months ago, I repotted the plant to a much bigger container and used really loose and well draining soil. After that, I was delighted to see flower buds sprouting and now... the soft-looking flower clusters.
Hydrangea Macrophylla loves water. This is probably why in Greek, hydrangea means hudōr (water) + angeion (vessel).
Below is a picture of the plant when I first bought it. The plant has always been placed in the bright shade.
Would adding some rusty nails or peat moss to the soil be able to change the colour of the flowers to blue? Coz I couldn't find any blueing tonic here ;-(
Now I wonder if it is better to just get a full grown one instead of a young plant as I had waited for about a year for the flowers to flourish! Nonetheless, the flowers are definitely sweet rewards :-D