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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comHello and help! When we had our backyard professionally landscaped a couple of years ago, they planted three what they told me were “astilbe” plants. The plants took root wonderfully but now are so tall and wide they’re just taking over. I was wondering about when and how I could trim them back. I looked online for information about astilbes but all I found were smaller flowering plants. I’m totally clueless about this so would appreciate any help you can give me! I don’t want to accidentally kill the beauties! I’ll attach pictures of the plants from now and when they first were put in.
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[1] https://www.gardeningknowhow.com/ornamental/flowers/astilbe/types-of-astilbe.htm: https://www.gardeningknowhow.com/ornamental/flowers/astilbe/types-of-astilbe.htm
[2] https://www.gardeningknowhow.com/ornamental/flowers/astilbe/growing-astilbe-plants.htm: https://www.gardeningknowhow.com/ornamental/flowers/astilbe/growing-astilbe-plants.htm
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1 Comment To "When is the best time to trim this plant back? It’s gotten so high!"
#1 Comment By GKH_Susan On 01/17/2020 @ 4:54 pm
There are different varieties of astilbe, with different heights.
https://www.gardeningknowhow.com/ornamental/flowers/astilbe/types-of-astilbe.htm [1]
The best time to prune is after the flowering cycle. Do a light to moderate height reduction by selective shaping. Don't take more than 25% of the foliage at one time.
https://www.gardeningknowhow.com/ornamental/flowers/astilbe/growing-astilbe-plants.htm [2]