Kumato Tomato

The Kumato tomato is the brown skinned cocktail tomato in the grocery bin next to the red ones. A small placard usually explains that brown is normal here. What it will not tell you is that you cannot legally buy seed for it.

Kumato is a trademark of the Syngenta Group. It covers fruit grown from a hybrid line registered as Olmeca and coded SX387. Only a small number of chosen growers hold a license.

Syngenta states plainly it will not sell seed to the public.

That has not stopped home gardeners from trying anyway. A surprising amount of forum evidence suggests some of them succeed. This page lays out what is officially documented, what growers report from saved seed, and where accounts disagree.

What the Kumato tomato actually is

Syngenta describes Kumato as a cocktail tomato. That size class sits between a cherry tomato and a full slicing tomato. The company puts average fruit weight at 80 to 120 grams, roughly 3 to 4 ounces.

One widely cited plant database lists a much larger range, up to 8 ounces. That figure does not match any other source we found. We treat it as an outlier, not a reliable data point.

The fruit is round and smooth. It ripens from dark green through brown to a golden green blush, rather than turning red like most tomatoes. Syngenta’s own copy calls this a change “from dark brown to golden green.”

That phrasing reflects how the company frames the color shift on the vine. Texture is consistently described as firm, with thick walls and few seeds. Several forum growers praised that trait for cooking.

Flavor is where the record gets genuinely inconsistent. That inconsistency is documented, not just anecdotal.

The origin story, and where two accounts disagree

Syngenta’s trade press materials tell the discovery this way. In the 1970s, a grower named Luis Ortega noticed unusual tomatoes at the edge of a plantation near Adra, in Almeria, Spain. Those materials describe Ortega as a Syngenta geneticist by the time the story is told.

The plants sat under drought stress. The fruit showed different color and sweeter flavor. A separately sourced account describes Ortega differently, calling him an independent farmer whose family worked that land from the 1970s.

In this version, Syngenta later acquired exclusive rights to the variety. Both accounts agree on the decade, the region, and the drought stress detail. They disagree on one point.

Did the discovery happen inside Syngenta’s own breeding program? Or did it happen on an independent farm that Syngenta later licensed? We could not resolve which framing is more accurate, so we are flagging the dispute rather than picking a side.

Syngenta’s official Kumato site describes the approach as “natural breeding techniques developed in Spain.” It traces the line to wild Mediterranean tomatoes adapted to drought and salinity. That description fits either version of the origin story.

The commercial rollout is better documented. Trade press coverage confirms Syngenta launched a dedicated Kumato advertising campaign in January 2013. Television spots and in store promotion ran across several European markets that year.

Kumato had already reached UK shelves and forum discussion before that campaign. So 2013 marks a marketing push, not the true introduction.

Why Kumato is brown, and why it tastes inconsistent

The brown to reddish brown color is a bred trait of the Olmeca and SX387 line. It is not a sign of disease or an unripe fruit. Syngenta points to naturally higher fructose content as the reason for the color and much of the flavor claim.

The company’s own copy is unusually candid about the tradeoff this creates. It states flavor can range “from almost no flavor to sweeter than typical tomatoes.” That range depends on the fruit and the growing conditions.

Forum growers report the same spread in their own words. One long time grower who saves Kumato seed called the homegrown flavor good. That grower praised it for pasta sauce, citing the few seeds and thick flesh.

A different forum poster who bought store fruit called it bland and mealy. That poster blamed early picking and cold storage, not the variety itself. A separate forum thread went further, calling supermarket Kumato “just like a supermarket tomato” and dismissing it as a marketing ploy.

Set against that is a pizza focused forum. Members there praised fresh Kumato’s low acid, high fructose flesh on a sauceless Margherita style pie. They noted it was easy to find at Trader Joe’s and Wegmans.

Read together, the flavor record supports Syngenta’s own framing better than either extreme review alone. Some fruit really is bland. Some fruit really is sweet, and both outcomes are documented.

The seed question: what growers actually report

Syngenta’s position is unambiguous: Kumato seed is not sold to home gardeners. Seed is licensed only to commercial growers Syngenta selects under contract. Unauthorized propagation of the protected Olmeca and SX387 lines is treated as a plant variety rights and trademark issue.

That has not stopped a persistent thread of home gardening activity built on saved seed from store bought fruit. One grower on a gardening forum described growing Kumato from saved seed for six straight years. That grower reported it “has always grown true.”

The vines were described as lankier, with smallish regular leaves.

Other posts in the same community describe uncertainty rather than confidence. Growers openly ask whether their saved seed will produce anything close to the parent fruit, since Syngenta markets the line as an F1 hybrid. Standard hybrid genetics predict real variation in later generations.

That makes the long term consistency some growers report genuinely surprising for a conventional F1 line. We could not verify why some growers see stable results while the hybrid classification would predict more drift. It may reflect a narrower genetic cross, selective replanting by growers who discard off type plants, or simply small sample sizes in these reports.

Anyone growing Kumato from saved seed should treat the result as an informal experiment. It is not a guaranteed match to the store bought original.

Growing the Kumato tomato

Starting and support

Seed is not sold commercially. Most home attempts start from seed saved out of a store bought fruit rather than a purchased packet. Our tomato growing guide covers starting seed indoors and the indeterminate versus determinate distinction.

That distinction applies here, since Kumato grows as a tall, indeterminate vine reported at around 6 feet.

Give plants a sturdy trellis, cage, or stake from the start. One forum grower described the vines as noticeably lankier than a standard slicing tomato. That argues for support installed early rather than added later.

Water, feeding, and harvest

Water consistently rather than letting soil swing between dry and soaked. Our guide to watering tomatoes covers that balance. Feed on a standard balanced tomato schedule; our guide to fertilizing tomatoes walks through a season long approach.

Skip the usual color based ripeness check here. Kumato ripens through brown and green tones rather than red. A gentle squeeze test is the more reliable signal, the same approach growers use for other dark skinned varieties.

One forum thread reported minimal disease trouble outside a severe regional late blight year. That is a single grower’s account, not a formal resistance rating. This variety was never developed for home garden trial networks, so no official disease resistance codes are published.

Fruit can still split or show blossom end rot like any tomato. Our tomato fruit problem guide covers diagnosis for issues common to thick skinned varieties.

Nutrition and uses in the kitchen

Sunset Grown, one of Kumato’s licensed marketers, lists the fruit as fat free and cholesterol free, low in sodium, and a good source of vitamins A and C, lycopene, and beta carotene. That profile is broadly in line with tomatoes generally, rather than something unique to this variety. Our tomato nutrition guide covers the fuller picture.

In the kitchen, the thick walls and low seed count growers praise for sauce also suit raw slicing, salads, and sandwiches. Minneopa Orchards lists salsa, canning, freezing, and drying as additional uses, alongside standard fresh eating.

The firm flesh holds up well to dicing for salsa and to roasting, since it does not collapse the way a juicier slicer can. That same firmness is part of why some tasters find it less immediately juicy than a classic red slicing tomato.

Some home cooks use Kumato in place of a standard slicer on a sandwich or burger. They value the thicker walls for a cleaner bite. Others prefer it diced small into a fresh salsa, where the low seed count means less watery runoff.

Kumato vs Black Krim vs Chocolate Cherry

Black Krim is the obvious comparison for anyone browsing dark colored tomatoes, but the two do not really compete. Black Krim is an open pollinated heirloom beefsteak, sold freely as seed, running 8 to 12 ounces with a rich, sweet, slightly salty flavor that home growers can reproduce every season.

Kumato is a trademarked hybrid cocktail tomato roughly a third that size. Its seed is not available through normal channels at all. Choose Black Krim if you want a proven, seed saveable dark slicer for your own garden.

Chocolate Cherry sits closer to Kumato on the flavor spectrum, with a sweet, rich, faintly smoky profile and similarly dark brown red skin, but at cherry tomato scale around half an ounce. It is open pollinated and widely sold as seed, maturing faster at 65 to 70 days against Kumato’s informally reported 70 to 84.

If the appeal of Kumato is really its brown coloring and rich flavor reputation, rather than the brand name itself, Chocolate Cherry offers a legitimate, seed saveable path to a similar eating experience at home.

The verdict

Kumato earns its supermarket popularity honestly. The fructose driven sweetness claim, the firm thick walled texture, and the striking brown color are all real, documented traits, not pure marketing invention.

What the marketing leaves out matters, though. Flavor genuinely varies fruit to fruit. No official growing data exists for home gardeners, and Syngenta has deliberately kept this variety out of the retail seed trade.

Anyone who wants to grow Kumato at home is working from saved store bought seed and forum reports, not a purchased packet with a known track record. That is a real, honest option for the curious, but it carries real uncertainty and no guarantee the fruit will match the store bought original.

If a reliable, well documented dark tomato for the home garden is the actual goal, Black Krim or Chocolate Cherry deliver that with none of the trademark restrictions. Either one comes with a known days to maturity figure and a published flavor reputation. Both come as a seed packet you can simply buy again next year.

Frequently asked questions

Can you grow Kumato tomatoes from store bought seeds?

Syngenta does not sell Kumato seed to home gardeners, so every packet sold online comes from someone saving seed out of season. Multiple long term growers report the saved seed keeps producing recognizable Kumato fruit for several generations, which is unusual for a hybrid. Treat any home grown result as an informal experiment, not a guaranteed match to the commercial fruit.

Is Kumato a real cultivar name or just a brand?

Kumato is the trademark. The tomato itself is registered under the names Olmeca and the code SX387. Syngenta owns both the trademark and the plant variety rights, and licenses production only to growers it selects.

Why does Kumato tomato taste different from one fruit to the next?

Syngenta’s own marketing describes flavor ranging from almost no taste to sweeter than a typical tomato, driven by higher fructose in some fruit and not others. Growers report the same inconsistency. Several forum posts blame early picking and cold storage rather than the variety itself.

Why is Kumato tomato brown instead of red?

The color comes from its specific breeding line, not from being unripe or diseased. Fruit ripens from dark green through brown to a golden green blush, and it is ready to eat well before it turns fully red.

Can home gardeners legally buy real Kumato seed?

No. Syngenta licenses seed only to commercial growers it selects under contract, and states plainly that seed is not sold to the public. Any seed sold as Kumato to home gardeners is unlicensed and sits outside that system.

Is Kumato tomato the same thing as a black tomato like Black Krim?

No. Kumato is a hybrid cocktail tomato bred for brown skin and shelf life. Black Krim is an open pollinated heirloom beefsteak bred for flavor and size, and the two only share a loosely similar dark color family.