...and i 'll share it with you. In the plastic bags where the plant pots were, there was some jelly. After research it's a polymer gel currently used by florists like this example http://www.lejardindesophie.fr/318-gel-floral.html . This hydro-gel comes from a polymere sold in dried powder or...

 Bon mon texte s'est volatilisé je renvoie le post après déjeuner ! Ok my article has disappeared i 'll send you the post after lunch !