I have 5 Hydrangea White Annabelle's. With the fourth of July coming I am thinking of making them Red-(Pink), White and Blue. Baking soda will make them one color. Vinegar will make them another color. Acid (Vinegar)= What color? Baking soda (Alkalin)= What color? What proportions should be used when mixing into water? Can I mix to heavy? I love my plants and do not want to kill them. Please help with any tips. Just a few days left. Your advice is anticipated! Thank You in advance!