The damp, decaying vegetation in these bogs made the soil unusually acidic, discouraging the growth of most plants. Cranberries, though, thrive in such soils. The low - growing, strawberrylike vines flourished from as far south as modern - day Virginia to as far north as Canada.
Taču dzērvenēm šāda augsne ir tieši tas, kas vajadzīgs, tāpēc Amerikā šie ložņājošie pundurkrūmi bija sastopami no mūsdienu Virdžīnijas dienvidos līdz pat Kanādai ziemeļos.