"Kenni Judd" wrote:

Hi, Gannet: Sounds like your balcony has a solid roof? If so, I'm
surprised you feel the need for additional shade for "high light" plants.
Personally, I'd worry that you wouldn't have enough light to get, say,
vandas to bloom well, before adding more shade ...

But in any event, yes, 30% shadecloth is supposed to block 30% of the sun
and let 70% through.

Well, the balcony faces South, so there is the area near the
wrought-iron railing that's in full sun most of the day, and the area
in the shadow of the hard roof. The idea is to hang shade cloth
vertically, and place plants directly behind that, in the "full sun"
area. Right now that area is not very usable for orchids, and indeed,
under the hard roof may well not be bright enough for Vandas.
Paradoxically, I need the shade cloth so I can increase the light for
the Vandas.

Thanks for the confirmation of percents.

Gannet
St. Petersburg, Florida