Ideal Soil pH for Flowers

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
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
Carnation	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
Chrysanthemum	6.0 – 7.0
Daffodil	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
Lavender	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