The supplier directory

Sales open: Orders taken fall and winter until sold out, delivered in April (2025-26)

Tubers from a small family cut-flower farm

Ships to US mail order, delivery in April

Sales open: Season sale opened November 30 at 9am Mountain (2025-26)

Hand-divided single tubers with bulk and wholesale discounts, organic practices

Ships to US only

Sales open: Tuber sales open in December; tubers ship in April (2025-26)

Single tubers plus seeds and cut flowers, 100+ varieties

Ships to US via USPS Priority

Sales open: Community spring sale plus online ordering (2025-26)

Tubers for both cut-flower and tuber production, hundreds of varieties

Sales open: Orders open late November to early December before each growing season (2025-26)

Single tubers, exclusively large A (8 inch plus) and giant AA (10 inch plus) varieties

Ships to US only, USPS Priority

Sales open: Two annual tuber releases, January and February (2025-26)

Tubers, with a claimed 500+ varieties in stock

Sales open: Taking orders for spring delivery; pickup orders ready by mid May (2025-26)

Single field-grown tubers and in-person plant sales, 230+ varieties

Ships to US mail order plus local pickup and an in-person plant sale

Sales open: Tuber and seed sales generally run January through April, with announced restock sales (2025-26)

Single tubers and seeds, including the farm's own Coseytown breeding line

Ships to All 50 US states; tubers held and shipped from April by climate region

Sales open: Spring sale opened April 17 at 8pm in the most recent season (2025-26)

Tubers from show-focused stock, around 800 varieties grown annually; virus-suspect plants destroyed

Sales open: Website reopens July 15, 2026 for spring 2027 tuber orders (2026-27)

US field-grown tubers and perennials from their own Washington farm

Ships to US only

Sale-open date not yet confirmed

Hand-picked single tubers, around 300 varieties with a cut-flower focus

Sale-open date not yet confirmed

Single field-grown tubers, guaranteed true to name, with around 50 new varieties introduced each year

Ships to US plus several overseas markets

Sales open: Tuber ordering opens in the fall and runs through May 30 (2025-26)

Tubers from an organic vegetable and flower farm, 70+ varieties; field open to visitors August to October

Ships to US via USPS, plus local pickup

Sales open: Accepting orders for spring as of June 2026 (2025-26)

Tubers across all ADS size classes, with an in-house breeding program

Ships to Canada and US (US orders carry a minimum and brokerage fee)

Sales open: Tuber store opened January 17 at 10am Eastern (2025-26)

Explicitly single tubers, not clumps; domestic field-grown stock

Ships to US and Canada (Canadian orders carry a phytosanitary and admin fee)

Sale-open date not yet confirmed

Tubers, rooted cuttings, bulbs, and seeds

Sale-open date not yet confirmed

Field-grown tubers from the farm

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

Sales open: Presale opened February 7 in the most recent season; tubers ship March to May (2025-26)

Single tubers with ADS classification data published on every listing

Ships to US; tubers ship March through May

Sale-open date not yet confirmed

Tubers, rooted cuttings, and seeds; one of the few farms selling all three

Sales open: Orders taken for the growing season until May 1 (2025-26)

Single tubers guaranteed to have an eye and be rot free, around 200 varieties

Ships to US and Canada via USPS

Sales open: Sales historically open January to February (2025-26)

Tubers, 300 to 400 varieties, regenerative growing practices

Sales open: Online store open through mid May for the season (2025-26)

Field-grown tubers; also hybridizes new varieties

Ships to US and Canada, with phytosanitary certificate for Canadian orders

Sales open: Online tuber sales run spring and close in early June (2025-26)

Field-grown tubers, 200+ new and heirloom varieties; also event flowers and on-farm sales

Ships to US, with sustainable packaging

Sale-open date not yet confirmed

Tubers and rooted cuttings in very limited hobby-farm quantities

Sale-open date not yet confirmed

Breeder-direct sales of KA's varieties from a small urban farm

Sales open: Most recent sale opened mid February at 10am Pacific, with newsletter subscribers an hour early (2025-26)

Farm-grown, farm-divided single tubers in a small curated catalog

Ships to US; shipping begins in March, weather permitting; local pickup in Gardnerville

Sale-open date not yet confirmed

Rooted cuttings only, not tubers; cuttings grow their own tubers in a season

Ships to US via USPS Priority on a customer-selected ship date

Sales open: Tubers listed twice a year: fall after digging and spring after dividing (2025-26)

Single tubers, all grown on the farm; no resale or imports

Ships to US only; ships late March to mid April

Sale-open date not yet confirmed

Single tubers and bulk tuber packs

Ships to US nationwide plus local delivery and pickup

Sales open: Tuber orders for spring 2027 open August 1, 2026; orders run August through May (2026-27)

Single tubers, ordered ahead and shipped in spring

Ships to US; Canada and international with phytosanitary certificate and added fees

Sales open: Sales historically open in March; fall preview promised for next season (2025-26)

Single tubers, 700+ varieties, among the largest US catalogs

Sale-open date not yet confirmed

Tubers from a state-inspected licensed nursery; develops its own varieties

Ships to All 50 US states (licensed nursery)

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