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Welcome to The Thielke Arboretum, Glen Rock, New Jersey!

The Garden in Your Backyard

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ARTboretum 2017
Weed Warrior Day 2017
Nature Journaling 2017
Fishing Derby 2017
Bugs in the Brook
Bird Watching 2017
Spring StoryWalk 2017
Winter Journey Sticks Wal
Bark ID Workshop
Winter StoryWalk
Summer StoryWalk
Fall StoryWalk