Adding coffee grounds or other organic material to your hydrangea's soil will reduce the pH level and make aluminum more available to the plant. The result will be hydrangeas that are blue in color.

Hydrangeas & Coffee Grounds

Adding coffee grounds or other organic material to your hydrangea's soil will reduce the pH level and make aluminum more available to the plant. The result will be hydrangeas that are blue in color.

Lungwort - purple flowers, shade garden  "I have these!  But mine are more purple"

Pulmonaria 'Raspberry Splash'

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