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Soil pH Levels for Flowers

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

Vegetables: 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
Crysanthemum 6.0 - 7.0
Columbine 6.0 - 7.0
Coreopsis 5.0 - 6.0
Cosmos 5.0 - 8.0
Crocus 6.0 - 8.0
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
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
Viola 5.5 - 6.5
Zinnia 5.5 - 7.5


Find the ideal soil pH level for your favorite plants:


More Information:

About soil pH

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

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