Hydrofarm IPO Presentation Deck

2020 YTD performance is reflective of both our topline growth drivers and margin enhancement strategies Net sales 41% YoY growth $181mm $255mm Q3 YTD 2019 Q3 YTD 2020 Top-line growth accelerated across the period 34% volume + 7% price/CIP Volume across all brand categories with particular strength in proprietary and preferred Price includes % GTN Impact (customer Investment program) HYDROFARM compensation Gross profit % margin 121% YoY growth 11.9% $22mm Q3 YTD 2019 18.7% $48mm Q3 YTD 2020 Gross profit margin improvement of -680bps driven by improved gross-to-net, an increase in proprietary and preferred brand mix, and freight cost optimization Adj. EBITDA¹ ~840bps margin improvement (2.1%) 6.3% % margin ($4mm) Q3 YTD 2019 CONFIDENTIAL Q3 2020 net sales up -60% YoY with adj. EBITDA margin of -7.7% $16mm Q3 YTD 2020 Emphasis on our higher margin brands has boosted our Adj. EBITDA margin Operating leverage as SG&A² as a % of net sales is down-160bps Source: Company information Note: Adj. EBITDA margin is a non-GAAP messure, which is obtained by dividing Adj. EBITDA by net sales, see reconciliation to the rearest GAAP messure at the end of this presentation: 50&A excludes depreciation and stock-based 27

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