Posted: 04/08/2013 at 00:12
The natural colour of Hydrangeas is usually pink. The blue colour is induced by what is in the soil. You can buy potions to water in and make/keep the flowers blue. Or you can create your own - just rusty water. I do it the easy way, anything rusty like old nails, bits of broken rusty metal etc, I just throw them into the middle of the bush at soil level, and let the rain do the rest. If you ever come across a Hydrangea that naturally has blue flowers, it will be growing near a metal post that will be rusty below ground level.