Thanks for the tip! We aggressively remove all Canada geese with every means availalable, (dog barking, humans yelling, airsoft guns blasting, sticks being thrown, water cannon etc) They only come in the spring when it is time to find a nest and they usually leave the next day and never come back. We did have it once where a pair with young came to the pond and they would not leave as long as it was light. I even used strong flashlights to flash them after dark and generally make their stay unpleasant. They were gone by the next daylight. I assume the little ones could not fly and so they all walked out somewhere...

But I think bill and I will work on this project in the spring when we can assure better root growth.