Plants You Should Never Grow Too Close To Your Hydrangeas

Black Walnut Tree

Black walnut trees produce juglone, a substance toxic to many plants, including hydrangeas. This chemical inhibits the growth of hydrangeas and other sensitive plants nearby


Sunflowers thrive in full sun and hotter conditions, making them quite different in their needs compared to hydrangeas

Lilac Bush

Lilac bushes prefer full sun and alkaline soil, contrasting sharply with the acidic soil and partial shade that hydrangeas need.


Rosemary is a perennial herb that flourishes in sunny, dry environments and prefers lean, well-draining soil


Peppers are another high-sun, low-water plant that conflicts with the needs of hydrangeas.

China Aster

China asters require full sun and good air circulation to thrive, conditions that do not align well with the needs of hydrangeas.

Amur Maple

Amur maple, while smaller than many trees, still competes intensely with hydrangeas for root space and nutrients


Squash plants, including zucchini, are vigorous growers and heavy feeders that require a lot of space and nutrients, which can deprive hydrangeas of essential resources

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