You may be referring to bogs, though not all bogs are swampy or low, as some bogs are in mountains as well as lowland areas.
Middle Colonies
A low swampy land is an area with low elevation that is often saturated with water, leading to the formation of wetlands such as swamps. These areas are characterized by waterlogged soils and a variety of plant and animal species adapted to the wet conditions.
Indigo
Ireland is an island that is divided into the Republic of Ireland, which is independent, and Northern Ireland, which is part of the United Kingdom. The land itself is mostly made up of plains and low lying mountains.
Usually in bogs and other swampy areas where nitrate levels in the soil are very low.
low swampy area.
near low land
The land was low and swampy. Swamps meant mosquitoes , and mosquitoes could carry deadly diseases
They could grow rice in swampy areas.
they faced running low on food because the swampy land wasn't good for farming and none of the people bothered to farm too.
flat, swampy coastal plain; low mountains in south
Mainly low, swampy, forested areas around the Everglades.