Keep these plants far apart.
But lavender requires dry, hot, and sunny spots to thriveand that’s not thebest situation for hydrangeas.
Black Walnut Trees
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Who knew that some plants can actually poison other plants?
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That’s the reason why black walnut trees and hydrangea are a toxic combo.
Roses are a good example of sun-loving plants that like drier conditions."
“Many plants are allelopathic to some degree, including sunflowers.”
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But if you’re looking for a great companion for your hydrangea, this definitely is not it.
It also produces the allelopathic chemicals that’ll stunt your hydrangea’s growth.
You should especially watch out for willow trees, McConnell says.
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“You should avoid plants that are water hogs, like willows.”
Think about color combos
Choose a color combination that’ll add some wow to your garden.
“Consider coreopsis, yellow echinacea, daylilies, and rudbeckia for yellow plantings with blue hydrangeas.
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Purples and lavenders like salvia and speedwell offset pink hydrangeas.”
“In shadier spots, evergreen ferns work well and also contribute that much needed winter interest.”
Common Sunflowers.Sasa Pokimica/Getty Images
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Xuanyu Han
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