AMSEED American Seed Intelligence Platform
Tomato variety

Carbon

Heirloom tomato

Breeding
Heirloom
Growth habit
Indeterminate
Days to maturity
80-85 days
2 sources, none independent · basis unstated
Fruit
purple-black, beefsteak
Weight
10-14 oz
2 sources, none independent
Bred by
-

Grey captions say what stands behind that particular figure. Breeding, growth habit and fruit characters carry no caption because they rest on the record's sources as a whole rather than citing their own; closing that gap is ordinary outstanding work, not a finished job.

Origin & history

An Ohio-bred dark heirloom that has repeatedly taken top honors in blind tastings, producing smooth purple-black beefsteaks with less of the cracking that plagues the class.

Measurements

MeasurementValueContext
Days to maturity 80-85 days Consensus range across the cited sources, which include both independent references and commercial catalogs.
Fruit weight 10-14 oz Typical range for the cultivar, as a consensus across the cited sources. Not a measured mean from any single crop: fruit weight varies with season, spacing and where on the plant the fruit set.

Against the rest of the tomato database

Where this variety sits among every tomato we hold a comparable figure for. Position is not merit: earlier is not better than later, and hotter is not better than milder. Only cultivar-level figures are compared, never trial results, and maturity is only ranked against figures counted the same way.

Days to maturity 80-85 days · ranked at its midpoint, 82.5
47.5 median 75 90

later than 79% of the 258 tomatoes we hold a figure for. None of these figures state whether they are counted from sowing or from transplant, so they are ranked against each other on the assumption that suppliers use one convention, which is not something any of them says.

Fruit weight 10-14 oz · ranked at its midpoint, 12.0
2.5 median 12.0 32.0

lighter than 51% of the 72 tomatoes we hold a figure for.

Traits

Disease resistance

No documented disease resistance, typical of heirlooms and older open-pollinated varieties. See tomato diseases for the cultural playbook that fills the gap.

Related varieties

Sources & References

Evidence: 2 sources, 1 community collection and 1 seed catalog. No independent reference documents this yet.

  1. Seed Savers Exchange catalog & variety histories · Seed Savers Exchange, Community Collection
  2. Tomato Growers Supply catalog · Tomato Growers Supply Company, Seed Catalog