Basil basil Basil is a tender annual herb native to warm climates. It thrives in heat, strong light, and consistently moist, fertile soil. In Sweden it is best grown in pots, greenhouses, or warm microclimates outdoors. Growing conditions LightFull sun; at least 6 hours direct light, more for strong flavor. Soil typeWell-drained, fertile loam enriched with compost. Water requirementMedium; consistent moisture without waterlogging. Nutrient requirementMedium; lightly fertile and regularly refreshed soil. Back to plant list