Soil pH Levels for Plants

965 Shares

If you're thinking of starting your own garden or you're already a seasoned gardener, you should know that each plant requires its soil to be a different pH level. This simply means weather your soil is more acidic, less acidic, or alkaline. All fruit, vegetables, shrubs, flowers, and trees, require different soil pH levels, and this reference guide can let you know what those levels are! Once you have that information, you can prepare your soil accordingly!

Common Name	Optimum pH Range
Trees and Shrubs
Apple	5.0-6.5
Ash	6.0-7.5
Azalea	4.5-6.0
Basswood	6.0-7.5
Beautybush	6.0-7.5
Birch	5.0-6.5
Blackberry	5.0-6.0
Blueberry	4.0-6.0
Boxwood	6.0-7.5
Cherry, sour	6.0-7.0
Chestnut	5.0-6.5
Crab apple	6.0-7.5
Dogwood	5.0-7.0
Elder, box	6.0-8.0
Fir, balsam	5.0-6.0
Fir, Douglas	6.0-7.0
Hemlock	5.0-6.0
Hydrangea, blue-flowered	4.0-5.0
Hydrangea, pink-flowered	6.0-7.0
Juniper	5.0-6.0
Laurel, mountain	4.5-6.0
Lemon	6.0-7.5
Lilac	6.0-7.5
Maple, sugar	6.0-7.5
Oak, white	5.0-6.5
Orange	6.0-7.5
Peach	6.0-7.0
Pear	6.0-7.5
Pecan	6.4-8.0
Pine, red	5.0-6.0
Pine, white	4.5-6.0
Plum	6.0-8.0
Raspberry, red	5.5-7.0
Rhododendron	4.5-6.0
Spruce	5.0-6.0
Walnut, black	6.0-8.0
Willow	6.0-8.0
Vegetables
Asparagus	6.0-8.0
Bean, pole	6.0-7.5
Beet	6.0-7.5
Broccoli	6.0-7.0
Brussels sprout	6.0-7.5
Cabbage	6.0-7.0
Carrot	5.5-7.0
Cauliflower	5.5-7.5
Celery	5.8-7.0
Chive	6.0-7.0
Cucumber	5.5-7.0
Garlic	5.5-8.0
Kale	6.0-7.5
Lettuce	6.0-7.0
Pea, sweet	6.0-7.5
Pepper, sweet	5.5-7.0
Potato	4.8-6.5
Pumpkin	5.5-7.5
Radish	6.0-7.0
Spinach	6.0-7.5
Squash, crookneck	6.0-7.5
Squash, Hubbard	5.5-7.0
Tomato	5.5-7.5
Flowers
Alyssum	6.0-7.5
Aster, New England	6.0-8.0
Baby’s breath	6.0-7.0
Bachelor’s button	6.0-7.5
Bee balm	6.0-7.5
Begonia	5.5-7.0
Black-eyed Susan	5.5-7.0
Bleeding heart	6.0-7.5
Canna	6.0-8.0
Carnation	6.0-7.0
Chrysanthemum	6.0-7.5
Clematis	5.5-7.0
Coleus	6.0-7.0
Coneflower, purple	5.0-7.5
Cosmos	5.0-8.0
Crocus	6.0-8.0
Daffodil	6.0-6.5
Dahlia	6.0-7.5
Daisy, Shasta	6.0-8.0
Daylily	6.0-8.0
Delphinium	6.0-7.5
Foxglove	6.0-7.5
Geranium	6.0-8.0
Gladiolus	5.0-7.0
Hibiscus	6.0-8.0
Hollyhock	6.0-8.0
Hyacinth	6.5-7.5
Iris, blue flag	5.0-7.5
Lily-of-the-valley	4.5-6.0
Lupine	5.0-6.5
Marigold	5.5-7.5
Morning glory	6.0-7.5
Narcissus, trumpet	5.5-6.5
Nasturtium	5.5-7.5
Pansy	5.5-6.5
Peony	6.0-7.5
Petunia	6.0-7.5
Phlox, summer	6.0-8.0
Poppy, oriental	6.0-7.5
Rose, hybrid tea	5.5-7.0
Rose, rugosa	6.0-7.0
Snapdragon	5.5-7.0
Sunflower	6.0-7.5
Tulip	6.0-7.0
Zinnia	5.5-7.0