Hydrofarm IPO Presentation Deck

Hydrofarm's strong relationships with a global network of suppliers has created a meaningful moat around our business Supplier breakdown Spend with suppliers by country Netherlands 3% Poland 5% Canada 16% Other 9% China 24% United States 43% Suppliers by % of total supplier costs 9% 7% 5% 4% 4% 3% CONFIDENTIAL Commentary Spend is distributed broadly across many suppliers and categories Total spend of $200mm across ~400 suppliers ■>$1mm spend with ~40 suppliers No single supplier makes up more than 9% of total supplier costs ■Long-term relationships with key suppliers, with an average relationship for our top 20 suppliers in excess of 11 years HYDROFARM Note: Category breakdown accounts for top 80% of suppliers by spend: supplier breakdown only includes suppliers that account for at least $500k in costs 31

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