David Hobson looks at why blue hydrangeas grow best in acidic soil and says it’s best to grow plants that suit your soil.

We'll leave you with a lesser-known tip: Ben Hilton, founder of The Yard and Garden, suggests applying Epsom salt (i.e. magnesium sulphate) to the soil surrounding your hydrangeas. It can help improve ...

That way, your hydrangeas won't risk infection from bacteria. Related: Can You Really Change the Color of Hydrangea ...

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