Where to buy Penhill Dark Monarch
Farms we have confirmed listing Penhill Dark Monarch for the 2025-26 season, last checked 2026-07-20. Sought-after varieties sell out fast; a listing is not a stock guarantee.
Read the full Penhill Dark Monarch profile
Triple Wren Farms
Sales open: Main US tuber sale in January; Canadian sale in February; spring sale March to April (2025-26)
Single tubers and dahlia seeds; also brings hybridizer partner varieties to market
Ships to US and Canada, via separate US and Canadian storefronts
Heirloom Soul Florals
Sales open: The 2026 tuber sale has closed; the shop reopens Spring 2027 (2026-27)
Individual tubers, bulk five-packs, and dahlia tuber gift boxes
Ships to All 50 US states
Sold out? Closest alternatives
No substitute is exact, and we say so in each profile. These are the varieties growers reach for when Penhill Dark Monarch is gone.