The upper marsh can include plants sea rush and Sea milkwort and also plants with lower salt tolerance which may also grow inland such as red fescue, creeping bent and autumn hawkbit.
Yng nghanol y morfa heli bydd glaswellt morfa heli cyffredin, a dylai hefyd gynnal amrywiaeth o blanhigion sy'n gallu goddef halen megis seren y morfa, troellig arfor a llyriad arfor.