Abstract ---------------------------------------------------------------------- -----
The present invention relates to a freshness retentive for cut flowers, which comprises a mixture of a silver compound and a primary amine and/or a nucleic acid-related substance and/or reaction products thereof. The silver compound is silver nitrate, silver acetate or silver phosphate; the primary amine is methylamine, ethylamine, monoethanolamine, tris(hydroxymethyl)aminomethane, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol, .alpha.-aminooxyacetic acid or aminoethoxyvinylglycine; and the nucleic acid-related substance is nucleic base, nucleoside, nucleotide, oligonucleotide, polynucleotide, purine derivative or pyrimidine derivative.
