I find it particularly bizarre that, given my unaccountable addiction to house-plants during my school years and subsequently, I've never actually come across this before. It's like they had a giant SEP field attached until three months ago, and now suddenly I realise they're everywhere :>.

I shall bear your neighbourhood planet in mind if I succeed in killing this. So far it's manifesting a reasonable degree of hardihood, which is just as well, as I'm a bit cavalier with my indoor plants.