Selection of suitable growing substrates and quality assessment of Brassica microgreens cultivated in greenhouse

Brassica microgreens are typically cultivated using a peat-based growing substrate with higher production cost as this must be imported from overseas. In Vietnam, source of local bio-materials that could used to replace peat, resulting in more affordable substrates. Several substrates for were evaluated study: GT1 (30% sand +20% organic soil + 50% coco coir), GT2 (75% coir 25% rice husk), GT3 CaO 2.2 mg/kg acid humic 0.41%) and peat GT4 white sphagnum +25% vermiculite (size 4–6 mm). The material was found effective the microgreen production. mixed increase risks soil-borne disease infestation on microgreens. Microgreens grown had productivity lower levels than other tested Nitrate level microbiological contamination (E. coli Salmonella spp.) these determined at safe levels.