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Ideal Soil pH Levels for Flowers

To grow the very best flowers, start with an idela soil pH level for flowers. The optimum correct pH level varies by plant.

Flowers: Ideal pH
Ageratum 6.0 - 7.5
Alyssum 6.0 - 7.5
Aster 5.5 - 7.5
Azalea 4.5 - 6.0
Cactus 4.5 - 6.0
Calendula 5.5 - 7.0
Candytuft 6.0 - 7.5
Canation 6.0 - 7.5
Celosia 6.0 - 7.0
Cleome 6.0 - 7.0
Columbine 6.0 - 7.0
Coreopsis 5.0 - 6.0
Cosmos 5.0 - 8.0
Crocus 6.0 - 8.0
Crysanthemum 6.0 - 7.0
Dafodil 6.0 - 6.5
Dahlia 6.0 - 7.5
Day Lily 6.0 - 8.0
Delphinium 6.0 - 7.5
Dianthus 6.0 - 7.5
Forget-Me-Not 6.0 - 7.0
Forsythia 6.0 - 8.0
Foxglove 6.0 - 7.5
Geranium 6.0 - 8.0
Gladiola 6.0 - 7.0
Gypsophilia 6.0 - 7.5
Holly 5.0 - 6.5
Hyacinth 6.5 - 7.5
Iris 5.0 - 6.5
Lavendar 6.5 - 7.5
Lilac 6.0 - 7.5
Marigold 5.5 - 7.0
Morning Glory 6.0 - 7.5
Nasturtium 5.5 - 7.5
Pansy 5.5 - 7.0
Petunia 6.0 - 7.5
Pincushion Flower 6.0 - 7.5
Pinks 6.0 - 7.5
Poppy 6.0 - 7.5
Portulaca 5.5 - 7.5
Primrose 5.5 - 6.5
Roses 5.5 - 7.0
Salvia 6.0 - 7.5
Snapdragon 5.5 - 7.0
Sunflower 5.0 - 7.0
Sweet Pea 6.0 - 7.5
Sweet William 6.0 - 7.5
Tulip 6.0 - 7.0
Virginia Bluebell 6.5 - 7.5
Viola 5.5 - 6.5
Wallflower 5.0 - 8.0
Zinnia 5.5 - 7.5

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 the ideal soil pH level for your favorite plants:


More Information:

About soil pH

More on Soil Testers

About Electronic Soil Testers

Soil testers are invaluable to measure soil pH. If you don't have this vital garden toy, err tool.








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