TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Composition: The composition comprises as component I mulch or potting soil. The microorganism of component II is selected from Bacillus amyloliquefaciens, B. amyloliquefaciens subsp. plantarum, Bacillus cereus, Bacillus firmus, Bacillus megaterium, Bacillus methylotrophicus,Bacillus mojavensis, Bacillus mycoides, Bacillus psychrosaccharolyticus, Bacillus pumilus, Bacillus safensis, Bacillus simplex, Bacillus solisalsi, Bacillus stratosphericus, Bacillus subtilis, B. subtilis subsp. Subtilis, Lysinibacillus boronitolerans, Microbacterium testaceum, Paenibacillus amylolyticus, Paenibacillus barcinonensis, Paenibacillus glycanilyticus, Paenibacillus lautus, Paenibacillus peoriae, Paenibacillus polymyxa, Paenibacillus taichungensis, Paenibacillus xylanexedens, Solibacillus silvestris, Sporosarcina globispora, Sporosarcina psychrophila, Aspergillus flavus, Ampelomyces quisqualis, Aureobasidium pullulans, Candida oleophila, Candida saitoana, Clonostachys rosea f. catenulata, Coniothyrium minitans, Cryphonectria parasitica, Cryptococcus albidus, Fusarium oxysporum, Metschnikowia fructicola, Microdochium, Phlebiopsis gigantea, Pseudozyma flocculosa, Pythium oligandrum, Talaromyces flavus, Trichoderma asperellum, Trichoderma atroviride, Trichoderma harzianum, Trichoderma viride, Trichoderma polysporum, Trichoderma stromaticum, Trichoderma virens, Trichoderma viride and Ulocladium oudemansii. The microorganism of component II comprises a bacilli microorganism or a Gram-positive microorganism. The microorganism comprises B. subtilis. The composition further comprises a carrier; at least one of a surfactant or a solvent; and a colorant, a resin or binder and a preservative. The mulch is wood mulch. The microorganism, or a cell-free extract or at least one metabolite, and/or a mutant of the at least one microorganism having all the identifying characteristics of the respective microorganism or extract of the mutant are present in an amount of 0.01-10% (w/w) of the composition. The microorganism and/or a mutant of the microorganism having all the identifying characteristics of the respective microorganism are present in an effective amount of 1x101-1x109 CFU/ml of the composition. Preferred Method: Making the composition further involves mixing a carrier into the mulch or the potting soil or into the composition. In enhancing plant growth, the layer of the composition has a thickness of 0.5-15 cm. Alternatively, enhancing plant growth, water use efficiency of the plant, plant appearance, or the population of beneficial microorganisms or the content of metabolites beneficial to plant health produced by the beneficial microorganisms in the soil around the plant, comprises: applying a potting soil composition to soil and/or into a container, and planting one or more growing plants or sowing one or more plant propagation materials within the potting soil composition. ACTIVITY - Plant Growth Regulant. No biological data given.    MECHANISM OF ACTION - None given.    EXAMPLE - No suitable example given.