An annual of open mud and muddy sand on intertidal flats and in the lowest parts of saltmarshes, and occasionally in the mid-marsh along the banks of saltmarsh creeks and runnels. Lowland.
S. dolichostachya was not mapped in the 1962 Atlas and there is no reliable information on trends in its distribution. It is almost certainly under-recorded, being overlooked or else dismissed, along with other glassworts, as `Salicornia agg`.
European Boreo-temperate element.