THE SCIENCE BEHIND WHAT NOBODY'S SAYING
Most plant advice skips the biology.
This is the biology.
Houseplants — The Unwritten is a science-based blog about what is actually happening inside your plants, your substrate, and the products on your shelf. Not what the label says. Not what the community repeats. What the peer-reviewed literature actually shows — and where it runs out.
No sponsorships. No confident recommendations without evidence. No answers where there are only questions yet.
Written by a Dutch plant obsessive working within the world of microbiology, based in Denmark.
LATEST POSTSPRODUCT ANALYSIS
Physan 20 — Should We Use It?
The SDS lists severe skin burns and aquatic toxicity. The hobby recommends it preventively. Those two things are worth examining together.SUBSTRATE BIOLOGY
The Invisible Garden
Your substrate is the most biologically complex environment your plant will ever inhabit.