In article ,
"Wendy7" wrote:

I also heard that if some kind of "salt" is added when watering the blue
colour
becomes more vibrant. I just can't think of the type of salt, maybe Epson or
Manganese???
Cheers Wendy

Acid soil makes pink flowers. We have alkaline water (from having a
limestone aquifer) so the flowers are blue.
--
Peace! Om

"Love and compassion are necessities, not luxuries. Without them humanity cannot survive." -- Dalai Lama