How To Care For Bigleaf Hydrangeas. If you grow it in highly alkaline soil it will produce pink flowers. If you are unable to provide partial shade to your hydrangea slightly increase the amount of water you provide each week.
If you grow it in highly alkaline soil it will produce pink flowers. Bigleaf and smooth hydrangeas require more water but all varieties benefit from consistent moisture. Let them get big and airy.
Let them get big and airy.
Nearly all varieties look best when you just let them be. To change the colors of bigleaf hydrangea blooms lower the soil pH by adding sulfur peat moss or aluminum sulfate to the soil throughout the growing season. Nearly all varieties look best when you just let them be. For best results start the seeds indoors in cell packs or seed starting pots.