If you are enlarging your garden rr by adding new track over existing plants, here is a procedure that has worked for me:
1 - Rubber band the track sections together you intend to install – these are track segments that can be easily handled and placed.
2 - Carefully lay the “banded” track sections over the existing plants – careful of flower stems.
3 - With a watering can or any container you comfortable can use to pour, fill it with white play sand – sterilized sand used for children’s play areas vs. beach sand also sold at Home Depot or Loews, etc. – and pour enough of the sand down through the rr track ties to make a clear white pattern over the plants.
4 - Remove the track and now you have a pattern for plant removal visible from the sand.
FURTHER:
If you choose to not lay the track directly on a crushed gravel or other base, laying brick sections, spaced at 5 - 7 " intervals, provides a base for the track and elevates it to enable the dirt and ground cover from ovelaying the rails. I made this installation and then:
1 - Mixed concrete and poured it over and in-between the bricks
2 - Leveled the mix and have it slightly wider than the bricks – covering them and beveling the sides as roadbed
3 - Placed the rubber-banded track sections onto the leveled mix and wiggled the ties into the mix, making sure the track was level, and waited 10 - 15 minutes
4 - Then lifted the track sections so the mix dried with the indentations of the hollow ties showing in the concrete. The indentations will hold the track on the dried concrete roadbed. The 'wiggling" made sure there was both a small amount of lateral and back-and-forth movement to provide for any expansion.
Those tips have worked for me.
Wendell