HYDROFARM HOLDINGS GROUP, INC.

(a) On May 9, 2025, the Company and certain of its subsidiaries entered into a seventh amendment to the Revolving Credit Facility (the “Seventh Amendment”), pursuant to which the maturity date of the Revolving Credit Facility was extended from June 30, 2026 to June 30, 2027, the maximum commitment amount under the Revolving Credit Facility was reduced from $35,000 to $22,000, and certain other changes were made, including the addition of a $2,000 availability block, an increase of the cash dominion trigger from less than 10% of availability to less than 50% of availability and an increase of the fixed charge ratio trigger from less than 10% excess availability to less than 20% of excess availability. The foregoing description of the Seventh Amendment does not purport to be complete and is qualified in its entirety by reference to the Seventh Amendment, filed as Exhibit 10.3 to this Quarterly Report on Form 10-Q.

(b) Not applicable.

(c) During the quarter ended March 31, 2025, no director or officer of the Company adopted, modified orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” as such term is defined in Item 408(a) of Regulation S-K.