Use of a substance with oxytocin activity in order to stimulate plant growth

A plant growth stimulation mixture, comprising an effective plant stimulating concentration of at least one substance with oxytocin activity, wherein said at least one substance is:

• (SEQ ID NO:2)
• X9-S
• X1-X2-X3-X4-Asn-Cys-X5-X6-X7-X8-NH2
• wherein X1 is selected from the group consisting of Cys, Mpa and nothing,
• X2 is selected from the group consisting of Tyr, (O-methyl-Tyr), Phe, and nothing,
• X3 is selected from the group consisting of Ile, Val, Hoph, Phe, Cha, and nothing,
• X4 is selected from the group consisting of Gln, Ser, Thr, Cit, Arg, and Daba,
• X5 is selected from the group consisting of Pro, and nothing,
• X6 is selected from the group consisting of Ile, Leu, nothing, Val, Hos, Daba, Thr, Arg, and Cit,
• X7 is selected from the group consisting of Gly, nothing, and Ala,
• X8 is selected from the group consisting of Gly and nothing, and
• X9 is selected from the group consisting of CH2 and S;
• and salts thereof.