I recently bought this plant online, and it arrived covered in some kind of white webbing. A friend has a tradescantia and it does not have white webbing on it. Neither do the tradescantia plants in the hallway of my building. Neither does the one in the photo on the retailer’s website. I emailed photos to the retailer - Gardenersdream.co.uk - and asked for a refund. Their response is that the webbing is perfectly normal and is how the plant is supposed to look. Is it?!
I’m concerned that the webbing is caused by some kind of parasite, which will spread to my other houseplants.