On 7 Mar 2007 05:48:09 -0800, "dannysmom"
wrote:


It's supposed to be a Nikko Blue. If I apply the sulfur this spring
can I expect blue blooms this summer?

Use the following to determine final bloom color (determination of
bloom
color is set approx. late Aug-early Sept.):

pH 7.0 = red
6.5 - 7.0 = white
5.5 - 6.5 = pink
4.5 - 5.5 = blue
4.5 = purple

pH control for plants: to raise pH, use hydrated powdered
lime at a rate of 1.1#/100sq.ft. to raise pH 1pt. for heavy soil.
To lower pH, use ironite or iron sulphate at a rate of 2.5#/100sq.ft.
to lower pH 1 point.
For 10sq.ft. (size of large hydrangea) area use 1/4 lb. of
ironite,
which is 1/2 cup.

VG information
To acidify the soil, use aluminum sulfate, which provides aluminum as
well as lowers pH, mixed 1 pound to 7 gallons of water. Soak the
ground with it after the plant starts growing in spring and repeat
twice at two-week intervals as necessary to lower the pH 1/2 point. To
raise the pH 1/2 point, spread ground limestone in spring or fall at a
rate of 5 pounds per 100 square feet.

Picked this off the NG several years ago and found a cup of Epsom
salts turn my normal blue to a deep purple. I usually apply in
October for the following year.

Regards,

Hal