Possible harm to dogs
Could astilbe cause any kind of allergic reaction to a dog?
Certified GKH Gardening Expert
Astilbe plants are not poisonous to dogs, and don't traditionally cause negative effects, but you should check with your veterinarian since all dogs (just like humans) are different. Your dog may be experiencing a reaction to a plant (whether it's an Astilbe or any other plant) that other dogs may not.