Loch a' Mhadail is located in Inverpolly, in an area that consists mostly of bogs, marshes and fens surrounding a number of inland lochs and rivers with some broad-leaved deciduous woodland coverage. Loch a' Mhadail along with other lochs in the area are nutrient poor with a low number of associated plant species that includes Juncus bulbosus, Littorella uniflora and Lobelia dortmanna. Larger lochs in the area, for example Loch Sionascaig have a higher variation in flora, for example, Isoetes lacustris, Subularia aquatica and Myriophyllum alterniflorum.
