Fluoroazolylpropane derivatives of the formula I ##STR1## are described, in which Az is imidazolyl or triazolyl, R.sup.1 is hydrogen, alkyl or aralkyl which is unsubstituted or substituted by halogen, alkyl, alkoxy, halogenoalkyl, nitro, cyano, carboxyl or alkoxycarbonyl, R.sup.2 is C.sub.1 -C.sub.10 -alkyl which is unsubstituted or substituted by alkoxy, aralkoxy or phenyl, it being possible for the aromatic nuclei of aralkoxy and phenyl in turn to be unsubstituted or substituted by halogen, alkyl, alkoxy, halogenoalkyl, cyano, carboxyl or alkoxycarbonyl, R.sup.3 is hydrogen, alkyl, alkylcarbonyl or aralkyl which is unsubstituted or substituted by halogen, alkoxy, alkyl, halogenoalkyl, cyano, carboxyl or alkoxycarbonyl, R.sup.5 is an unsubstituted or monosubstituted or polysubstituted radical selected from the series comprising C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl, phenyl, naphthyl, biphenyl, benzylphenyl, benzyloxyphenyl, phenoxyphenyl and aralkyl, and X is oxygen or sulfur; including the acid addition salts, quaternary azolium salts and metal complexes.Methods of preparing these products are also disclosed, as are agrochemical compositions containing one of these compounds as the active substance. A process for controlling phytopathogenic microorganisms and/or for regulating plant growth by means of these substances is also described.