pH
Soil pH is a measure of the soil acidity or Soil alkalinity. An acid solution has a pH value less than 7. While a basic solution always has a pH larger than 7, an alkaline solution (i.e. a solution with positive acid neutralizing capacity) does not necessarily have a pH larger than 7.
Example of plant preferences:
Very Strongly Acid Soil 4.5-5.0 Some plants will not tolerate higher pH such as Orchid, Azalea, for blue Hydrangea (less acidic for pink) , Sweet Gum, Pin Oak.
Strongly Acid Soil. pH 5.0 - 5.5 Plants for acid soil in this range include Parsley, Potato, Tomato, Sweet Potato, Maize, Millet, Radish, Ferns, Iris, Orchids, Rhododendron, Camellia
Moderately Acid Soil. pH 5.5 - 6.0 Plants for a moderately acid soil include Bean, Brussels Sprouts, Carrot, Choko, Endive, Kohl Rabi, Peanuts, Rhubarb, Soyabean, Aster, Begonia, Canna, Daffodil, Jonquil, Larkspur, Petunia, Primrose, Violet and most bulbs.
Slightly Acid Soil. pH 6.0 - 6.5 Plants that prefer this soil include Broccoli, Cabbage, Cauliflower, Cucumber, Egg Plant, Pea, Sweet Corn, Pumpkin, Squash, Turnip, Red Clover, Sweet Clover, White Clover, Candytuft, Gladiolus, Iceland Poppy, Pansy, Rose, Snapdragon, Viola, Wallflower, Zinnea and Strawberry.
Very Mildly Acid. Soil pH 6.5 - 7.0 Plants that favor very mildly acid soil are Asparagus, Beet, Celery, Lettuce, Melons, Onion, Parsnip, Spinach, Lucerne, Carnation, Chrysanthemum, Dahlia, Stock, Sweet Pea and Tulip.
Regds
Manoj Singh