v3.26.3
Document And Entity Information
 6 Months Ended
Jun. 30, 2026
Document Information [Line Items]  
Document Type S-1
Entity Registrant Name Hydrofarm Holdings Group, Inc.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 81-4895761
Entity Address, Address Line One 1510 Main Street
Entity Address, City or Town Shoemakersville
Entity Address, State or Province PA
Entity Address, Postal Zip Code 19555
City Area Code 707
Local Phone Number 765-9990
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company false
Entity Central Index Key 0001695295
Amendment Flag false