Great Cressingham Fen

{{Short description|Protected area in Norfolk, England}}

{{Infobox SSSI

|image= Great Cressingham Fen 4.jpg

|image_caption =

|name= Great Cressingham Fen

|aos= Norfolk

|interest=Biological

|gridref={{gbmappingsmall|TF 847 022}}

|area= {{convert|14.3|ha|acre|abbr=off}}

|notifydate= 1988

|map=[https://magic.defra.gov.uk/MagicMap.aspx?startTopic=Designations&activelayer=sssiIndex&query=HYPERLINK%3D%271000561%27 Magic Map]

}}

Great Cressingham Fen is a {{convert| 14.3 |ha|acre|abbr=off|adj=on}} biological Site of Special Scientific Interest near Great Cressingham in Norfolk, England.{{cite web|url=https://designatedsites.naturalengland.org.uk/SiteDetail.aspx?SiteCode=S1000561&SiteName=&countyCode=29&responsiblePerson=&SeaArea=&IFCAArea= |title=Designated Sites View: Great Cressingham Fen | series= Sites of Special Scientific Interest|publisher=Natural England|access-date = 16 September 2018}}{{cite web|url= https://magic.defra.gov.uk/MagicMap.aspx?startTopic=Designations&activelayer=sssiIndex&query=HYPERLINK%3D%271000561%27|title=Map of Great Cressingham Fen|series= Sites of Special Scientific Interest|publisher=Natural England|access-date= 16 September 2018}} It is part of the Norfolk Valley Fens Special Area of Conservation.{{cite web|url= https://designatedsites.naturalengland.org.uk/SiteGeneralDetail.aspx?SiteCode=UK0012892&SiteName=&countyCode=29&responsiblePerson=&unitId=&SeaArea=&IFCAArea= |title=Designated Sites View: Norfolk Valley Fens | series=Special Areas of Conservation|publisher=Natural England|access-date = 25 May 2018}}

This calcareous spring-fed valley has a variety of vegetation types, ranging from dry unimproved grassland on high slopes to tall fen where the springs emerge at the valley bottom. There is a diverse range of flora, including some uncommon species. Plants in the valley bottom include water mint and southern marsh orchid.{{cite web|url= https://designatedsites.naturalengland.org.uk/PDFsForWeb/Citation/1000561.pdf |title=Great Cressingham Fen citation|series= Sites of Special Scientific Interest|publisher=Natural England|access-date= 16 September 2018}}

The site is private land with no public access.