Notes on pH
To Raise the pH One Unit
(in pounds per 100 square feet)
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| Light Sand |
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| Sandy Loam |
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| Loam |
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| Silt or Clay |
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To Lower the pH One Unit
(in pounds per 100 square feet)
pH Ranges for Common Vegetables
| Asparagus |
6.0-8.0 |
| Beets |
6.0-8.0 |
| Cabbage |
6.0-8.0 |
| Carrots |
5.5-7.0 |
| Cauliflower |
6.0-7.0 |
| Celery |
6.0-7.0 |
| Chives |
6.0-7.0 |
| Cucumbers |
5.5-7.0 |
| Eggplant |
5.5-6.5 |
| Endive |
6.0-7.0 |
| Horseradish |
6.0-7.0 |
| Lettuce |
6.0-7.0 |
| Lima Beans |
5.5-7.0 |
| Muskmelon |
6.0-8.0 |
| Onion |
6.0-7.0 |
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| Parsnip |
5.5-7.0 |
| Peas |
6.0-7.5 |
| Peppers |
5.5-7.0 |
| Potatoes |
5.0-6.5 |
| Pumpkins |
5.5-7.5 |
| Radish |
6.0-7.0 |
| Rhubarb |
6.0-7.0 |
| Rutabagas |
5.5-7.0 |
| Snap Beans |
5.5-7.0 |
| Spinach |
6.0-7.5 |
| Sweet Corn |
5.5-7.5 |
| Summer Squash |
6.0-7.5 |
| Tomato |
5.5-7.5 |
| Watermelon |
5.5-6.5 |
| Winter Squash |
6.0-7.0 |
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pH Ranges for Common Flowers
| Amaryllis |
5.5 - 6.5 |
| Baby's Breath |
6.5 - 7.0 |
| Balsam |
6.5 - 7.0 |
| Begonia |
5.5 - 7.5 |
| Caladium |
6.0 - 7.0 |
| Candytuft |
6.5 - 7.0 |
| Canna |
6.0 - 7.0 |
| Carnation |
6.5 - 7.0 |
| Chrysanthemum |
6.0 - 8.0 |
| Cockscomb |
6.0 - 7.5 |
| Coleus |
6.0 - 7.0 |
| Cornflower |
6.0 - 7.5 |
| Cosmos |
6.5 - 7.0 |
| Daffodil |
6.0 - 7.5 |
| Dahlia |
6.5 - 7.0 |
| Day Lily |
5.5-7.0 |
| Easter Lily |
6.0 - 7.5 |
| Four-O-Clock |
6.0 - 7.5 |
| Foxglove |
6.5 - 7.0 |
| Geranium |
6.0 - 8.0 |
| Gladiolus |
6.5 - 7.0 |
| Hollyhock |
6.0 - 8.0 |
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Iris
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6.5 - 7.0
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Larkspur
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6.5 - 7.0
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Lupine
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6.5 - 7.0
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Marigold
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6.0 - 7.5
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Nasturtium
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6.5 - 7.0
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Narcissus
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6.0 - 7.5
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Pansy
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6.5 - 7.0
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Perwinkle
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6.5 - 7.0
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| Petunia |
6.5 - 7.0 |
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Phlox
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5.0 - 6.0
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Poppy
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6.5 - 7.0
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Salvia
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6.0 - 7.0
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Shasta Daisy
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6.0 - 8.0
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Snapdragon
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6.0 - 7.5
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Sweet Alyssum
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6.5 - 7.0
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Sweetpea
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6.5 - 7.0
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Sweet William
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6.5 - 7.0
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Tuberose
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6.0 - 7.0
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Tulip
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6.0 - 7.0
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Verbena
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6.0 - 8.0
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Zinnia
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5.5 - 7.5
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pH Ranges for Common Grasses
| Bentgrass |
5.5-6.5 |
| Bermudagrass |
5.0-7.0 |
| Bluegrass, Annual |
5.0-7.0 |
| Bluegrass, Canadia |
5.5-7.5 |
| Bluegrass, Kentucky |
6.0-7.5 |
| Bluegrass, roughstock |
5.5-7.5 |
| Buffalograss |
6.0-8.5 |
| Carpetgrass |
4.5-7.0 |
| Centipedegrass |
4.0-6.0 |
| Clover, white |
5.5-7.0 |
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| Fescue, chewings |
5.5-7.5 |
| Fescue, creeping red |
5.5-7.5 |
| Fescue, tall |
5.5-7.5 |
| Gramagrass |
6.0-8.5 |
| Redtop |
5.0-7.5 |
| Ryegrass |
5.5-8.0 |
| St. Augustine grass |
6.0-8.0 |
| Wheatgrass |
6.0-8.5 |
| Zoysia |
4.5-7.5 |
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