Black Oxheart Tomato Reviews

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📌 Quick Summary (TL;DR): Black Oxheart (Bych’ye Serdtse Chernoe)

  • 🌍 Origin: A highly regarded commercial and family heirloom from Russia. Known in Russian as Bych’ye Serdtse Chernoe. Growers often debate how it compares to the American variety Brad’s Black Heart.
  • 🌿 Plant Habit: Indeterminate. It features the classic “wispy, drooping” oxheart foliage, but the main stem is thicker and sturdier than many other oxhearts. It produces suckers moderately, making pruning easy.
  • 🍅 Fruit Characteristics: Dark maroon/purple, heart-shaped tomatoes. They are large, typically weighing 7-14 oz (200-400g), but can reach up to 21 oz (600g). Note: Seed savers advise only saving seeds from perfectly heart-shaped fruits to keep the genetics pure, as it occasionally throws flat megabloom fruits.
  • 👅 Flavor: Exceptional. A rich, sweet, and complex dark tomato flavor. Meaty and perfect for fresh eating.
  • Yield & Maturity: Mid-season. Yields can be variable—some growers report massive harvests, while others struggle in cool, wet summers or extreme heat.
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Cherry (Olga) ⭐ Pro Grower (6,822 posts)
📍 Baranovichi, Belarus (USDA Zone 5)

Black Oxheart (Bych’ye Serdtse Chernoe)

Galochka (Esme) shared these seeds with me.
Indeterminate (VERY indeterminate 😉), the bush isn’t overly massive, leaves are large and slightly wispy/drooping. It doesn’t go crazy with suckers, very well-behaved. The fruits are dark maroon, heart-shaped, large (mine were up to 21 oz / 600 g), and just freaking delicious. The yield is average, but for the sake of this flavor, it is absolutely worth growing. It fruits evenly across all trusses; after the first and second trusses ripen, it sets fruit perfectly on the upper ones too. There are 2-4 fruits per truss, and the upper ones are not small at all. I will definitely be planting it again.

Large dark maroon Black Oxheart tomato sitting on a scale
Perfect heart shape of the Black Oxheart
Cluster of dark tomatoes on the vine
Sliced Black Oxheart showing meaty dense interior

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Marina ⭐ Pro Grower (5,182 posts)

I had two plants and both were sickly, the leaves turned black. They grew in different locations about a kilometer apart, but it didn’t affect the fruit. I assume the variety just needs time to acclimatize to our local climate. 🙄

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tomatinka (Vera) ⭐ Pro Grower (14,911 posts)
📍 Tyumen Region, Siberia (USDA Zone 3)

Mine were a bit smaller, but they had a much more pronounced heart shape.

Pointy heart-shaped dark Russian tomato

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Ira ⭐ Pro Grower (3,254 posts)

Adding a photo of my Black Oxheart. I absolutely loved the taste of this variety.

Harvested Black Oxheart tomato in hand

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Ellena (Elena) ⭐ Grower (135 posts)

Ladies, how is its plant habit? Can I plant them 2 per hole outdoors in the open ground?

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vasilevna ⭐ Pro Grower (1,346 posts)

I don’t know the exact scientific term for the habit, but I planted two in one hole and it grew just fine.

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Natalya(Nar) ⭐ Pro Grower (1,068 posts)

Mine (also from Galina’s seeds) grew into massive bushes over 8 feet (2.5m) tall. Yield was average (my own fault—I sowed them too early indoors, and two flower trusses dropped off by the time I transplanted them outside), but it is so delicious…

Don’t look at the green shoulders 😳 – the summer was so incredibly hot that this nonsense happened to every variety I grew.

Dark oxheart tomato showing green shoulders from heat stress

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Ellena (Elena) ⭐ Grower (135 posts)

They look great, so handsome!! Thanks ladies. I’ll plant 2 per hole then.

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Cherry (Olga) ⭐ Pro Grower (6,822 posts)
📍 Baranovichi, Belarus (USDA Zone 5)

Ellena said:
Thanks ladies. I’ll plant 2 per hole then.

I wouldn’t do that (IMHO). It isn’t as spindly and wimpy as many other oxhearts. The main stem is quite thick and sturdy. It’s much better to just prune a single plant to 2 main stems than to stuff 2 plants in one hole.

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Galiy (Galina) ⭐ Pro Grower (17,568 posts)
📍 Moscow Region (USDA Zone 4)

Could someone tell me if it’s a mid-season or a late-season variety? 🌺

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IrinaA ⭐ Pro Grower (5,492 posts)
📍 Sverdlovsk Region (USDA Zone 3)

My notes say it is late-season.

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Cherry (Olga) ⭐ Pro Grower (6,822 posts)
📍 Baranovichi, Belarus (USDA Zone 5)

IrinaA said:
My notes say it is late-season.

Mine wasn’t late at all. I definitely categorized it as mid-season.

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IrinaA ⭐ Pro Grower (5,492 posts)
📍 Sverdlovsk Region (USDA Zone 3)

Ok! I’ll correct it in my notes! 🌺

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Esme (Galina) ⭐ Pro Grower (5,701 posts)

It was mid-season for me too.

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Galina P. ⭐ Pro Grower (37,710 posts)
📍 Moscow Region (USDA Zone 4)

Galya, how were the yield and flavor for you?

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Esme (Galina) ⭐ Pro Grower (5,701 posts)

Galya, the yield was below average, but the flavor was very good. I plan to grow it again this year.

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Alena Andreeva ⭐ Pro Grower (12,011 posts)

This is what my Black Oxheart looks like right now.

Unripe green oxheart tomato

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Elena_ ⭐ Pro Grower (3,838 posts)
📍 Samara Region (USDA Zone 4)

My Black Oxheart segregated into a black-pink plant and a regular pink plant (seeds from Galina / Esme). If it were my first time, I would have thought it was an accidental seed mix-up. But the exact same thing happened with Black Russian from my own saved seeds. Makes you wonder how to properly save seeds from these dark varieties.

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Marina ⭐ Pro Grower (5,182 posts)

Elena_ said:
My Black Oxheart segregated into a black-pink plant and a regular pink plant…

Lena, maybe they just cross-pollinated?

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Elena_ ⭐ Pro Grower (3,838 posts)
📍 Samara Region (USDA Zone 4)

No. It’s not just about one rogue fruit. The plant itself is physically different. I’ve noticed before that the foliage of dark-fruited tomato plants has a bluer tint to it. And when the leaves dry up, they don’t turn yellow, they turn grey. You can’t see this at the seedling stage, otherwise, you could cull the plants that won’t produce dark fruits early on.

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Esme (Galina) ⭐ Pro Grower (5,701 posts)

We’ll see how mine turn out, I planted 4 of them. In the year I saved these seeds, there were no pink Oxhearts growing anywhere near the Black Oxheart.

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Elena_ ⭐ Pro Grower (3,838 posts)
📍 Samara Region (USDA Zone 4)

The average fruit is no less than 21 oz (600 g). I have 3 fruits per truss. The plants are definitely not weak; I really liked this variety.

I have 5 plants total: 4 “dark” genetics bushes and 1 “regular” bush.

On the right is a dried leaf from the regular bush, on the left is from the dark one.

On the left is a fresh leaf from the regular bush, on the right is from the dark one.

The green unripe fruits also look different between the regular and dark ones. It’s just hard to see in the photos.

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Esme (Galina) ⭐ Pro Grower (5,701 posts)

I’m growing both this one and Brad’s Black Heart this year. They are different varieties, although the difference is subtle. Black Oxheart has more of a raspberry/pinkish hue, while Brad’s is more reddish. And to my taste, Black Oxheart is sweeter, though I’ll keep comparing them (they are planted right next to each other).

Brad's Black Heart vs Russian Black Oxheart
Color comparison of dark oxheart tomatoes
Green tomatoes on the vine
Close up of a ripening dark heart tomato

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murjulia ⭐ Grower (55 posts)

My Black Oxheart did terrible this year (((.

Only two tiny tomatoes on two whole plants, I’m afraid I won’t even get enough to save seeds (((.

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Alena Andreeva ⭐ Pro Grower (12,011 posts)

The flavor of Black Oxheart didn’t win me over 😢. The yield was weak; on 2 main stems I got 6 little fruits, the biggest one being 9 oz (250g).

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Danko (Elena) ⭐ Pro Grower (10,117 posts)

BLACK OXHEART.
This mid-season and productive variety can be considered unique in its qualities: it produces large oval-heart-shaped fruits of a dark color. Compared to a similar variety like “Morning Dew,” it has much higher flavor qualities. The fruits are meaty, weighing 7-10 oz (200-300g, up to 400g), great for salads. The plant is 4-5 feet (1.2-1.5m) tall with dense foliage.

Beautiful dark heart-shaped tomato
Another view of the dark oxheart
Sliced Black Oxheart tomato

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Sandr (Alexander) ⭐ Grower (339 posts)

And here is how my Black Oxheart turned out!

Very ribbed, almost flat Black Oxheart tomato
Ugly but tasty ribbed dark tomato

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Valentina 54 (Valentina) ⭐ Pro Grower (15,100 posts)
📍 Sverdlovsk Region (USDA Zone 3)

Sasha, did that one grow from a megabloom (fasciated blossom)? And how did it taste?

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pumpkin_garden (Alina) ⭐ Grower (338 posts)

Are Black Bull’s Heart and Black Oxheart the exact same variety, or are they different?

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Sinyer (Vitaliy) ⭐ Pro Grower (4,399 posts)
📍 Almaty

murjulia said:
Only two tiny tomatoes on two whole plants, I’m afraid I won’t even get enough to save seeds (((.

If you don’t manage to save seeds, don’t worry too much. We will send you more, no problem.

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tomatinka (Vera) ⭐ Pro Grower (14,911 posts)
📍 Tyumen Region, Siberia (USDA Zone 3)

We really should figure this out. 😳 Galya says they are somewhat similar to Brad’s Black Heart. Now, Moor’s Heart is definitely different. It stands apart from them.

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pumpkin_garden (Alina) ⭐ Grower (338 posts)

Maybe we should do a joint experiment and grow all three varieties together? Just to settle it once and for all…

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Esme (Galina) ⭐ Pro Grower (5,701 posts)

Alina, I think they must be the same thing. But Brad’s is definitely different.

A little OFF topic: I feel like there are way too many “Bull’s Hearts” floating around, especially if someone grew them from an imported packet where the names are written in different languages…

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tomatinka (Vera) ⭐ Pro Grower (14,911 posts)
📍 Tyumen Region, Siberia (USDA Zone 3)

I grew them in different years, so I could be wrong, but they seemed like twins to me. Now, Moor’s Heart, even when grown in different years, I can tell is different. I grew it specifically to compare. It’s not as juicy, much drier. And inside it’s different, even in color. It’s closer to the “Snickers” variety in texture and color. But the shape and size are completely different. It would be a great idea to plant all three. Black Bull’s Heart, Black Oxheart, and Brad’s Black Heart. I need to think about doing that, especially since I really loved… the black hearts. 😉

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pumpkin_garden (Alina) ⭐ Grower (338 posts)

I actually have all three; I’ll probably compare them this year.

I’m just curious if it’s the exact same variety just with a different translation, or if they are genuinely different varieties—one Russian and one American…

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Esme (Galina) ⭐ Pro Grower (5,701 posts)

My very first seeds for Black Bull’s Heart were gifted to me. I don’t know exactly where they came from, but I suspect they might have been from Hristo (a known seed collector).

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g-lubovv (Lyubov) ⭐ Grower (99 posts)

I’m also very interested in the comparison of these tomatoes, but unfortunately, I’ll only be growing Black Oxheart this year 😲.

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Svetlyachok-plus (Svetlana) ⭐ Pro Grower (1,450 posts)

Black Oxheart really pleased me this year. The seeds were from Ksena Z in Belarus, for which I give her a huge thanks 🌺. I planted one bush outdoors and one in the greenhouse. The outdoor one was much more productive. I would even say the outdoor yield was above average, while the greenhouse one was low. The taste, as already mentioned, is soooo good 👍😋. And the fruits themselves are gorgeous, like they were made in a mold 😉.

An interesting story happened with the outdoor plant 😂. On one branch, in a truss of 3 tomatoes, one was absolutely lemon-yellow with the distinct stripes of the “Banana Legs” variety. My Banana Legs happened to be growing in the adjacent row 🙈. So I guess Banana Legs didn’t just walk by, it left some of its anatomy behind! 😂😂😂 It cross-pollinated and gave me an off-type Black Oxheart! 😂

Yellow striped tomato growing on a Black Oxheart plant
Cross-pollinated off-type yellow striped oxheart tomato
Close up of the Banana Legs cross

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Svetlyachok-plus (Svetlana) ⭐ Pro Grower (1,450 posts)

😉

Another view of the cross-pollinated fruit

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Svetikk ⭐ Pro Grower (29,360 posts)
📍 Moscow Region (USDA Zone 4)

Svetlyachok-plus said:
…on one branch, in a truss of 3 tomatoes, one was absolutely lemon-yellow…

😂😂😂 Were the other 2 tomatoes in that exact same truss dark? Just the one yellow? 😲😲😲

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cat2008 (Oksana) ⭐ Pro Grower (5,827 posts)
📍 Orsha, Belarus (USDA Zone 4)

It must be from the stress… 😲 it grew in Belarus, and suddenly it’s in Chelyabinsk… 😂😂😂

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Svetlyachok-plus (Svetlana) ⭐ Pro Grower (1,450 posts)

Svetikk said:
Were the other 2 tomatoes in that exact same truss dark?

Yep, just that one single fruit 😲.

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Svetlyachok-plus (Svetlana) ⭐ Pro Grower (1,450 posts)

cat2008 said:
It must be from the stress…

What, it turned pale from fear? 😂

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Cherry (Olga) ⭐ Pro Grower (6,822 posts)
📍 Baranovichi, Belarus (USDA Zone 5)

Wowwwwww!!!! I have never seen anything like that before! Too bad there’s no photo.

Ksusha most likely got her seeds from me. So it’s possible the roots of this incident trace back to my garden. Last year, my Black Oxheart was growing right across the aisle from White Heart.

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sandra (Alexandra) ⭐ Pro Grower (4,603 posts)
📍 Leningrad Region (USDA Zone 4)

Sveta, did you compare the taste? You absolutely must plant those seeds next year! You might have just created a brand new variety!

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Svetlyachok-plus (Svetlana) ⭐ Pro Grower (1,450 posts)

sandra said:
Sveta, did you compare the taste? You absolutely must plant those seeds next year!

I did compare the taste. The white one had a classic tomato flavor with a little sweetness, but the Black Heart was much tastier. But I will definitely plant the seeds, I’m curious myself to see what grows out of them 😉.

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KsenaZ (Kseniya) ⭐ Pro Grower (1,479 posts)

I am in shock…. 😲😲😲😲 Olya, yes, the seeds originally came from you. But I collected Sveta’s batch from my own grown plants. And for the life of me, I can’t remember what was growing next to them. I grew them both outdoors and in the greenhouse this year, and nothing like that happened for me.

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Alena ⭐ Pro Grower (10,109 posts)

– Plant appearance: mid-to-late season, weak vine.
– Fruit set: skipped a lot of blossoms.
– Bush height outdoors as of 8/17 was 2 feet (0.6m), plant already pulled out.
– Trusses: 1-3 fruits each.
– Overall yield: average, leaning towards low.
– Fruit shape: flat, shoe-shaped (megabloom/fasciated fruit), the others were just flattened with a hint of a blunt heart.
– Flesh density of ripe fruit: low (soft).
– Flavor: dense, harmonious, tasty, juicy, sweetness is a 4+ out of 5.
First impression: a tasty tomato for processing.

Seedling score – 4, Plant score – 3+, Fruit score – 4+, Overall variety score – 4.

Flat megabloom Black Oxheart tomato on a scale
Another view of the flat megabloom tomato

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Semechka ⭐ Pro Grower (23,539 posts)
📍 Krasnoyarsk, Siberia (USDA Zone 3)

Black Oxheart

Black Oxheart sliced tomato

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Marina H ⭐ Grower (121 posts)
📍 Kaliningrad (USDA Zone 6)

Loved it!
Delicious, sweet. Almost none made it to canning/processing—we ate them all fresh “raw.” In my conditions, the yield was decent, almost all fruits were around 14 oz (400g).
I’d call it mid-season.
The plant habit is very manageable for a greenhouse, I pruned to 2 main stems. Definitely planting again!

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