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Soil pH

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Notes on pH

To Raise the pH One Unit
(in pounds per 100 square feet)

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Soil Type
Ground Limestone or Oyster Shells
Burnt Lime
Hydrated Lime
Light Sand
3
2
2-1/2
Sandy Loam
4-1/2
2-1/2
3-1/3
Loam
6-3/4
3-3/4
5
Silt or Clay
8
4-1/2
6

To Lower the pH One Unit
(in pounds per 100 square feet)

Soil Type
Iron Sulphate
Aluminum Sulphate
Sulphur
Sand
3
2-1/2
1/2
Silt or Clay
7-1/2
6-1/2
2

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
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

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
Iris
6.5 - 7.0
Larkspur
6.5 - 7.0
Lupine
6.5 - 7.0
Marigold
6.0 - 7.5
Nasturtium
6.5 - 7.0
Narcissus
6.0 - 7.5
Pansy
6.5 - 7.0
Perwinkle
6.5 - 7.0
Petunia 6.5 - 7.0

Phlox
5.0 - 6.0
Poppy
6.5 - 7.0
Salvia
6.0 - 7.0
Shasta Daisy
6.0 - 8.0
Snapdragon
6.0 - 7.5
Sweet Alyssum
6.5 - 7.0
Sweetpea
6.5 - 7.0
Sweet William
6.5 - 7.0
Tuberose
6.0 - 7.0
Tulip
6.0 - 7.0
Verbena
6.0 - 8.0
Zinnia
5.5 - 7.5

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
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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