If your asthma is problematic looking into the spores in the dirt of your potted plants indoors. Many people can't handle the indoor plants which stinks! I love my plants.
True! will investigate replacing the soil with hydrocultures- I think because the clay balls are dry, there are no spore issues in hydrocultures.
Please use a air purifier instead.
Why? Instead of plants or the mechanical heat system? Which do you use? Thanks:)