Area of distribution and weediness of Persicaria hydropiper (L.)

@Edith, I just read the article to which you allude.

The first group comprises rooted species such as Persicaria or Knotweed (Persicaria senegalensis).

The weevil also has all the assets to attract local farmers.

The small molecules may be derived from natural sources such as grapes or Giant Knotweed (botanical name Polygonum).

Imported in France in the 18th century, the persicaria indigo was reintroduced in Provence in 2001.

If you’d like some seed I’d happily send you some in the autumn.

Our idea was to reintroduce the persian in France," says Martine Grégoire, president of the association "Couleur Garance".

The Indigo Persicariae, also known as Polygonum tinctorium, is an annual plant native to Japan.

If you don’t have a green hand, choose rustic flowers that don’t need much maintenance like the lupine, the lady’s-thumb or the nepeta.

At the extraction, the persicarian releases at the same time as the molecule indigotine, another molecule called indirubine which has the power to protect against the insects" notes Danielle Rozaire, secretary of the association.

And among them, a treasure, reintroduced in Provence thanks to Michel Garcia, inexhaustible gardener of the association, to the airs of mad scientist: the persicaria to indigo, which produces blue, queen of colors.