How we choose
The filter is a chain, in order. If a product fails one link, it does not join the range.
- Real need — a problem gardeners actually have, not one invented to sell to.
- Practical use — it must be usable by a person on a balcony, without a lab.
- Source and process — where it comes from and how it is made must stand inspection.
- Safety and quality checks — for the person, the plant, and the soil biology.
- Clear dosage — if we cannot tell you exactly how much, it is not ready.
- Fits the five-element system — it must have a place in the whole, not just a shelf.
- Worth asking a customer to pay for — the last link, and the one that kills most ideas.