How To Care For A Red Hydrangea. Ive done the same and it works. And as long as they are planted in well-draining soil with plenty of organic matter they should grow well.
Or lower the pH of the soil organically by spreading pine needle or pine bark mulch around the plants. Shake them off cut the bottom of the stem and place them in water with flower food. Sprinkle 1 cup of lime around the dripline of each shrub.
Red stems give this Hydrangea macrophylla another layer of red and red leaf veins stand out on leaves.
Sprinkle 1 cup of lime around the dripline of each shrub. As hydrangeas grow they can get very large. It might help revive your hydrangeas and increase their shelf life. This red hydrangea grows 3 to 5 feet tall and wide and is hardy in Zones 6 to 9.