Ideal Soil pH for Flowers

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About Ideal Soil pH for Flowers

Looking to grow the very best flowers this year? Start with the ideal soil pH for flowers you plant to grow. Pamper your flower plants by providing the optimum pH level. Ideal pH varies by plant. Check the pH level in your flower gardens at least annually.

Chart of Ideal Soil pH for Flowers

Flowers:Ideal pH
Ageratum6.0 – 7.5
Alyssum6.0 – 7.5
Aster5.5 – 7.5
Azalea4.5 – 6.0
Cactus4.5 – 6.0
Calendula5.5 – 7.0
Candytuft6.0 – 7.5
Carnation6.0 – 7.5
Celosia6.0 – 7.0
Cleome6.0 – 7.0
Columbine6.0 – 7.0
Coreopsis5.0 – 6.0
Cosmos5.0 – 8.0
Crocus6.0 – 8.0
Chrysanthemum6.0 – 7.0
Daffodil6.0 – 6.5
Dahlia6.0 – 7.5
Day Lily6.0 – 8.0
Delphinium6.0 – 7.5
Dianthus6.0 – 7.5
Forget-Me-Not6.0 – 7.0
Forsythia6.0 – 8.0
Foxglove6.0 – 7.5
Geranium6.0 – 8.0
Gladiola6.0 – 7.0
Gypsophilia6.0 – 7.5
Holly5.0 – 6.5
Hyacinth6.5 – 7.5
Iris5.0 – 6.5
Lavender6.5 – 7.5
Lilac6.0 – 7.5
Marigold5.5 – 7.0
Morning Glory6.0 – 7.5
Nasturtium5.5 – 7.5
Pansy5.5 – 7.0
Petunia6.0 – 7.5
Pincushion Flower6.0 – 7.5
Pinks6.0 – 7.5
Poppy6.0 – 7.5
Portulaca5.5 – 7.5
Primrose5.5 – 6.5
Roses5.5 – 7.0
Salvia6.0 – 7.5
Snapdragon5.5 – 7.0
Sunflower5.0 – 7.0
Sweet Pea6.0 – 7.5
Sweet William6.0 – 7.5
Tulip6.0 – 7.0
Virginia Bluebell6.5 – 7.5
Viola5.5 – 6.5
Wallflower5.0 – 8.0
Zinnia5.5 – 7.5

Note: The most ideal level, is the mid-point of a given range.

Simple, easy-to-use soil testers, help you to quickly determine if your soil pH needs an adjustment. And, they are inexpensive. About Soil Testers.

Find Ideal Soil pH Levels for your Favorite Plants

Electronic Soil Tester

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