Wow... I've heard of seeds being dormant...but 10 yrs!

That's amazing!

One thing in addition that appeared in the replanted front garden along the street was a wild vetch. We accidentally brought this small wild pea home in some ferns one year. I let it stay because peas nitrify the soil and help other plants. Well, it is mixed in there with the Saponaria too. I am going to harvest the pods if they ripen before we leave for summer and try them across the street in the "wild" area I am fixing.

I did give two Super Blossom treatments last fall in that spot.
When I dug out the Saponaria to save it (which died) I found it had a very deep finger sized root stock way down in the sand.
So that must have been stimulated and went all the way up to the sidewalk...the opposite direction from the damage!

Makes one wonder if just sticking a spade deeply here and there sometimes will do the same thing?