London (change)
Today 15°C / 11°C
Tomorrow 15°C / 13°C
7 messages
04/07/2012 at 15:32
I've just bought a Hydrangea Koria plant which has small white flowers which Ill be planting in a large pot. Am i correct in thinking if i don't get the soil PH correct then the flowers may change to pink or blue?
04/07/2012 at 18:27

I'm fairly certain that white hydrangea's stay white whatever the PH.

04/07/2012 at 18:28

You could use a lime free compost to be on the safe side.

04/07/2012 at 19:20

You should always use ericaceous compost when potting on Hydrangeas anyway. This will keep the colour true.

04/07/2012 at 19:25

Your plant should stay white but if you want to be sure you can water it with sequestrene in rain water if you live in a hard water(limey) area.  If you want a blue flowered plant then water with hydrangea colourant and the plant will turn blue. 

04/07/2012 at 19:32

Mark, colourant only works on blue Hydrangea which have turned pink through being in limey soil/compost. It will not turn a white Hydrangea blue.

04/07/2012 at 20:02

Sounds like my white flowers will be safe. I have some ericaceous compost, thanks for the replies.

email image
7 messages