These are the plants you should always avoid when determining the right companion plants for hydrangeas.

This all means the options forincorporating hydrangeas into your yardare nearly endless.

Once youveselected your hydrangea variety, you might be wondering what companion plants work best with this summertime stunner.

cottage summer garden with hostas, white hydrangeas, and various shrubs

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Why Are Some Plants Not Compatible With Hydrangeas?

Our list of plants you should never plant with hydrangeas is not exhaustive.

Light requirements are also key.

English lavender cottage garden

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Plants that need more sunlight are unlikely to thrive alongside hydrangeas that preferpartial shadeto filtered sunlight, Addy says.

This could lead to problems ranging from diminished flowers to uneven growth.

It releases a chemical into the soil around it that can inhibit your hydrangeas growth, warns Hancock.

If you have a black walnut, its best to put resistant varieties beneath or around this tree.

Lilac

Contrary to the preferences of hydrangeas, lilac would rather alkaline soil and full sun.

Lavender

Lavender does bestwith dry soil, whereas hydrangeas prefer more moist conditions.

SoHydrangea paniculatavarieties (including the popular ‘Vanilla Strawberry’ selection) arent good companions for plants like mountain laurels.

Running Bamboo

Due to the invasive nature ofrunning bamboo, its not a good match for hydrangeas.

Its quick growth rate can squelch out nearby bloomers in a flash.

If bamboo appeals to you though, Hancock says clump-forming varieties are okay.

For that reason, avoid planting hydrangeas near willow trees or other thirsty trees.