How to Change Hydrangea Flowers From Pink To Blue
Tips for gradually changing light pink Bigleaf (
and Mountain (
from pink to blue.
Melissa J. Will
Soil pH Test Strips
Bigleaf or Mountain
Plant hydrangea in container with suitable potting mix.
1 shrub Hydrangea
Test soil pH and record value.
Take photos of any flowers that form from now onward.
In fall, water plant thoroughly then apply half dose of aluminum sulfate per product instructions (usually 1.5 teaspoon in 1 gallon water).
1 bag Aluminum Sulfate
Overwinter plant as needed to protect from freezing temperatures.
In spring, at bud break, apply another half dose of aluminum sulfate.
Measure soil pH every few months and compare.
When pH is 5.6 or lower, hydrangeas can take up aluminum in soil and gradually turn light blue.
For instructions on turning light blue flowers to pink, see
Get your free
Empress of Dirt Newsletter
©2020 Melissa J. Will |