How to get my lily of the valley to spread and get thicker

I have had lily of the valley planted for several years in a partially shaded area, however it is still very sparse and thin. The weeds take over that area and I have to pull them out. What can I do to make it grow? Can I mow the weeds without hurting the lily?
Get it to grow?

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1 Comment To "How to get my lily of the valley to spread and get thicker"

#1 Comment By GKH_Susan On 08/25/2019 @ 11:26 pm

Perhaps more water would help. They prefer a moist soil. However, you are in hardiness zone 6 and the article below says lily of the valley may struggle in zones 6 and 7.

http://www.gardening.cornell.edu/homegardening/scene2835.html ^[1]

https://www.gardeningknowhow.com/ornamental/bulbs/lily-of-the-valley/dividing-lily-of-the-valley-plants.htm ^[2]

https://www.gardeningknowhow.com/ornamental/bulbs/lily-of-the-valley/moving-lily-valley-plants.htm ^[3]

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URL to article: https://questions.gardeningknowhow.com/how-to-get-my-lilly-of-the-vallet-to-spread-and-get-thicker/

URLs in this post:

[1] http://www.gardening.cornell.edu/homegardening/scene2835.html: http://www.gardening.cornell.edu/homegardening/scene2835.html

[2] https://www.gardeningknowhow.com/ornamental/bulbs/lily-of-the-valley/dividing-lily-of-the-valley-plants.htm: https://www.gardeningknowhow.com/ornamental/bulbs/lily-of-the-valley/dividing-lily-of-the-valley-plants.htm

[3] https://www.gardeningknowhow.com/ornamental/bulbs/lily-of-the-valley/moving-lily-valley-plants.htm: https://www.gardeningknowhow.com/ornamental/bulbs/lily-of-the-valley/moving-lily-valley-plants.htm

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