Need to see a pic of where you are doing this and how formal or informal it needs to be. Plastic coated metal plant stakes would support shade cloth.

tj

I wanted to buy shade cloth, but it's hard to get in my area. Instead, I used white cloroplast (corrugated plastic) for bright shade and flourescent light panel diffuser for slightly-less-than-full sun.

Held down by many bricks. Hasn't blown away in 50kph+ wind yet.

Agreed that a photo of your setup may give some additional ideas.

If you want to anchor anything to stucco it should work well but you need to do it proper way. There are anchors for that purpose; it all depends if you want to drill or not.

I have a temporary/summertime shelving that is 14feet long, supported every 30" or so, the end posts are 4x4, well anchored (but not in concrete). there is a 2x3 on top from end to end that is about 2' or so above the uppermost shelve, that I attached a plastic sheet from - I drop it down in case of heavy storm/rainfall. You could do something similar if for the season only, using shade cloth. But whatever you do, it needs well anchored support.