The Ducerf app and bulletin are essentially devoid of french vocab – you need the latin species names and a couple recurring words that can be googled.

There is differences even from France to Austria, but the essence of the framework fits very well.

What you will see is that many weeds from the States are just not contained. You could have a look at the Book of Beeby, test your soil with weeds. Which is a compilation of many ecological data lists.

It was the Ducerf principles that really were opening my eyes to aluminium toxicity and nitrite generation in some places in my soil, which really hurt.

There IS a database for many plants Dr. Dukes phytochemical and ethnobotanical databases.

https://phytochem.nal.usda.gov/phytochem/search

There you see a huge span of mineral contents in many wild species, but also some species that regulate specific mineral contents tightly.

What surprised me to see is that weeds go through phases with pretty low brix as well, if the climate does not suit them. So it is not the case that you are automatically in heaven, if the cues for germination were fitting the scheme.

Best H

Best H