White spots on my Trailing Ice Plants

Question

I planted, in our garden wall approximately 8 weeks ago, some Trailing Ice Plants. They appear to have grown very well, but I’ve noticed white spots on the leaves.
The soil mix I used was: 1 part sand, 1 part gravel, 1 part top soil, 4 parts compost & 1 scoop water crystals.
I also planted some in pots on the patio, I don’t have any white spots on these.
Please advise, what is causing it and what I need to do to stop it?
Kind regards a very Novice Gardner.

Answer 1

https://www.gardeningknowhow.com/plant-problems/disease/white-leaf-spot-control.htm

Answer 2

This is a common fungal issue. I would recommend using one or more of the following: Put wettable sulfur around the plant's soil, use neem oil, lavender oil, rosemary oil, or garlic oil. there are also many chemical fungicides.Here is an article that will help.