Hydrangea is Spreading Out of Control
Is there anything one can do to stop the 'spread' of hydrangea roots. We have an area where they 'popped' up about 5-6 years ago on the side of our driveway. They have grown like wildfire…too much so. I tried pulling them, but to no avail.
A little sweat equity and persistence should do the trick. Edge the area you want to keep intact. Use a sharp spade to cut through the rhizomes (underground root-like stems) to disconnect the hydrangeas you want to keep from those you want to remove. Continually prune the unwanted stems to ground level whenever they appear. Over time these stems should weaken and die. Or carefully treat the unwanted sprouts with a total vegetation killer such as Roundup or Finale. If you do not sever the rhizome before spraying you can injure or kill all the plants including those you want to keep.
February 22 , 2020
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