Pastime I am going to buy some irrigation staples, plastic ribbon and a paint pen as markers, I got the idea from looking at other peoples markers but I didn't want to spend a lot of money.
I first saw the staples when we had our sprinkler system installed, they used U shaped metal staples about 6" long to keep the plastic hoses down in the flower beds.
Now you just gave me a better idea, to use a mini blind instead of the tape and have DH drill holes so that the staple can go through it.
Margaret