P-booster

A method for promoting plant growth comprising utilizing a compound of the general formula (1)

• with the following definitions:
• R6 hydrogen, C1-36-hydrocarbon residue which can contain one to three halogen atoms and/or one to seven heteroatoms, selected from the group consisting of nitrogen, oxygen and sulfur,
• R1 hydrogen, C1-12-hydrocarbon residue which can contain one or two halogen atoms and/or one to three heteroatoms, selected from the group consisting of nitrogen, oxygen and sulfur, it also being possible for R1 and R3 to be covalently linked to form a 5- to 8-membered heterocyclic ring, which can contain 1 or 2 halogen atoms and/or one to three further heteroatoms in addition to the heteroatoms N already part of the heterocyclic ring,
• with m 3;4;
• 5;
• 6 and at most two of R5 not being hydrogen
• R4 independently hydrogen, halogen, NO2, C1-12-hydrocarbon residue which can contain one or two halogen atoms and/or one to three heteroatoms, selected from the group consisting of nitrogen, oxygen and sulfur.