• Houseplants
• Woody Ornamentals
• Vegetables
• Fruits
• References

pH 4.5 to 5.5
Achmines
Adiantum
African violet
Aloe
Amarylis
Aphelandra
Aurucaria - Norfolk Pine
Azalea
Begonia
Caladium
Calathea
Crossandra
Cyclamen
Dieffenbachia
Epiphyllum
Gardenia
Hydrangea
Impatiens
Maranta
Pellaea - a fern
Peperomia
Pilea
Polypodium
Primula
Rechsteineria
Saxifraga
Scindapsus
Streptocarpus
Syngonium
Zygocactus

pH 5.5 to 6.5
Anthurium
Bromeliad Cattleya
Columnea
Cymbidium
Cypripedium
Daffodil
Gladiolus
Hyacinth
Iris
Narcissus
Phalaenopsis
Platycerium
Thipsalidopsis
Tulip
Vanda

pH 4.0 to 5.0
Spruce, Black

pH 4.5 to 5
Azalea

pH 4.5 to 6
Birch, European (White)
Heather
Rhododendron

pH 5 to 6
Most coniferous species would prefer a soil of this pH
Fir, Balsam
Hemlock
Pine, Jack less tolerant of pH above 6
Pine, Loblolly
Pine, Red Pinus resinosus less tolerant of pH above 6
Spruce, White

pH 5.0 to 6.5
Beech
Oak, Pin
Tamarack

pH 6 to 7
Most Hardwoods prefer a soil of this pH
Fir, Douglas
Oak, Black
Pine, White
Spruce, White
Yew, Japanese

pH 6 to 7.5
Ash, White
Maple, Sugar
Spruce, Colorado
Sycamore

pH 6 to 8.0
Walnut, Black

pH 4.8 to 5.5
Potato

pH 5.5 to 6.5
Endive
Parsley
Pepper
Rhubarb
Soybean

pH 5.5 to 7.0
Beans
Broccoli
Cabbage
Carrot
Celery
Cucumber
Pepper
Radish
Rhubarb
Squash
Sweet Corn
Sweet Potato
Tomato
Turnip

pH 5.5 to 7.5
Cauliflower
Onion
Tomato

pH 6.0 to 7.0
Broccoli
Celery
Lettuce
Lima Bean
Muskmellon
Parsnip
Pea
Spinach

pH 6.0 to 7.5
Beet, Table
Cabbage
Spinach

pH 6.0 to 8.0
Asparagus

pH 4.5 to 5.5
Raspberry

pH 5 to 6.5
Apple

pH 5.5 to 6.5
Grape
Strawberry

pH 5.5 to 7.0
Raspberry, Red

pH 6.0 to 7.0
Apricot
Cherry, sour

pH 6.0 to 7.5
Cherry, Sweet
Crabapple
Peach