@PhilP and @duncan1_9_8_4 thanks. I am liking the plants the most. The rock stuff is good and all, but I always envisioned the railway being filled with greenery.
There are 2 types of babys tears or mind your own business I think, the name seems to be interchangeable. You can see them either side of st peters station, the more aggressive one is doing a great job of covering the rock wall.
The coral looking plant beside the pond is called "the blob", there are 6 of them around the railway, all planted at the same time. You can see the size they start off at in front of the snow shelter about 4", the lime green circle amongst the baby's tears. It has hardly grown like the 4 others. 2 have taken off and do a great job of filling in the space. Maybe the name is generic and there are different types?