How do I make my pink hydrangea produce blue flowers? Andrew

Hydrangeas are exceptional in that the color of their flowers can change depending on the availability of aluminum ions. Available aluminum ions make the flowers blue. Aluminum ions are most available in soils that are acidic and are less available where soils are alkaline.

To encourage your hydrangeas to bloom blue, apply aluminum sulfate now and again in March. Follow package directions. This makes the soil more acid and provides aluminum ions. Repeat this treatment every fall and spring until the plants bloom blue. Remember, hydrangeas have already set their flower buds for next summer’s bloom and should not be pruned between now and then.

I have noticed that when I mow, I see lots of small moths flying up. There is also an

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