Please can anyone tell me what are these white round things on my plants stems, i have few pics....when i take them with my finger they become white powder any suggestions....Thanks.
I had those on my plants. I just thought they were flecks of perlite that dried up and were blown around by the fans. Same thing, turned to dust when you touched them.
They didn't do any noticable harm.
Please can anyone tell me what are these white round things on my plants stems, i have few pics....when i take them with my finger they become white powder any suggestions....Thanks. 
