Cuor di Bue / Bull’s Heart Tomato: Yield, Taste & Grower Info

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Quick Summary of Bull’s Heart (Cuor di Bue / Coeur de Boeuf)

  • 🌍 The Global Oxheart: This thread is a massive masterclass on the world’s most famous heirloom tomato. Known as Bychye Serdtse in Russia, Cuor di Bue in Italy, Coeur de Boeuf in France, and Coracao de Boi in Portugal. The forum admin officially merged all these threads, as they all represent regional adaptations of the same legendary lineage.
  • 🌿 Plant Habit: Indeterminate. This variety is the poster child for “wispy foliage”. The seedlings often look frail, weak, and skinny (leggy), and the adult plant has drooping, thin leaves. Do not over-fertilize trying to “fix” it—this is its natural genetic look.
  • 🍅 Fruit Characteristics: Massive, meaty hearts. Depending on the specific country’s strain or seed vendor, fruits can be bright red or raspberry-pink, and shapes can vary from perfect hearts to ribbed, pear-shaped pouches. They regularly reach 300-500g (10-17 oz), with some reporting 1.5 kg (3.3 lbs) monsters.
  • 👅 Flavor: The gold standard of tomato flavor. Universally praised for its intense, sweet, old-fashioned, rich taste with very few seeds.
  • 📈 Yield & Challenges: Yields are highly dependent on the grower and the climate. Some harvest buckets of fruit, while others struggle to get more than 2 or 3 giant tomatoes per plant. It is prone to dropping blossoms in extreme heat and can suffer from “yellow shoulders” if lacking potassium/shade.
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Mila (Lyudmila) ⭐ Pro Grower (8,411 posts)
📍 Moscow Region (USDA Zone 4)

Here are my Bull’s Hearts, I really liked this variety, super meaty and productive 😋😋😋

Only the shape differs a bit, but I know there are several strains floating around out there. Mine is the French one (Coeur de Boeuf) 😄😄😄

Edited November 24, 2013 by Mila

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Svetlyachok-plyus (Svetlana) ⭐ Pro Grower (1,450 posts)
📍 Russia

Oh wow Mila, double the joy for you! 😄😄.

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Angelina ⭐ Pro Grower (11,071 posts)
📍 Russia

Bull’s Heart, we’ve had this one in the family for over 20 years. The vines get about 3.6-4.2 ft (1.1-1.3 m) tall. I prune them to a single leader. The seedlings look pretty frail and wispy at first, but they bulk up fast once planted out. They don’t put out a ton of suckers, but the fruit clusters get huge and need heavy-duty support. Flavor-wise, they are hands-down the best I’ve ever eaten. Super aromatic with a perfect balance of sweet and acid. They’re actually best when you let them get slightly overripe.

Edited February 22, 2015 by Drosera

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

Are “Heart of a Bull” (Serdtse Byka) and “Bull’s Heart” (Bychye Serdtse) different varieties?

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Alexandra54 ⭐ Pro Grower (1,053 posts)
📍 Oryol Region (USDA Zone 4-5)

Angelina, can you grow them to two stems?

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nadinneta (Nadezhda) 🌱 Vegetable Expert (220 posts)

I planted Bull’s Heart outdoors, pruned them to 3 stems, and give the flavor a 5+ rating. It’s a bummer that late blight hit us so early, though. Next year I’m definitely putting at least 4 of these in the greenhouse. I also ordered “Heart of a Bull” from Redko, I wonder if the taste is exactly the same?

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Angelina ⭐ Pro Grower (11,071 posts)

Quote by Alexandra54:

Angelina, can you grow them to two stems?

You can, but the fruit size will be smaller.

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Svetikk ⭐ Pro Grower (29,344 posts)
📍 Moscow / South Moscow Region (USDA Zone 4)

Cuor di Bue, my seeds were originally from Novosibirsk, sent to me as an “improved” strain with increased yield.
Grew 1 plant in the greenhouse. It’s a shorter indet with that classic “wispy/weeping” habit 😄. It set 8 even, beautiful pink heart-shaped fruits. Very tasty, the variety is pretty similar to Rozoviy Myod (Pink Honey). Weights were hitting 300-400g (10-14 oz).
My friend grew it outdoors and it was a heavy yielder for her, she couldn’t praise it enough 🙂

Pink Bull's Heart tomato on scale
Beautiful pink Siberian Bull's Heart tomato

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

My packet was labeled “Early Bull’s Heart”. It ripened right alongside all the rest of my main crops, so I guess my strain is just the regular Bull’s Heart after all.

Seeds from V. Redko. Pruned to two main stems. Both the yield and the flavor were just average for me.

Top trusses of Bull's Heart tomato

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Sweet (Svetlana) ⭐ Pro Grower (8,792 posts)
📍 Belgorod Region, Russia (USDA Zone 5)

The seeds were gifted to me, originally from a commercial packet.

Indeterminate, but the plant stays pretty tidy. It doesn’t sprawl out too wide or shoot up too fast (not leggy). Mid-season. Fruit weight up to 500 g (1.1 lbs).

I don’t have photos of the ripe ones, I just forgot to label them, and I honestly can’t tell them apart from my other pink-fruited hearts 😳

Please, someone add some photos of ripe ones. Tan (Tomatanya), I’m counting on you 🤐 drop a photo.

Bull's Heart tomato commercial seed packet
Neat Bull's Heart plant with green tomatoes

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Tomatanya (Tatiana) 👑 Moderator (10,243 posts)
📍 Leningrad Region / St. Petersburg (USDA Zone 4)

Here you go! 🙂

Edited February 13, 2014 by Tomatanya

Large ripe Bull's Heart tomato in hand
Bull's Heart tomato plant loaded with fruit
Sliced pink Bull's Heart tomatoes

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Pomidoroved 👑 Forum Admin (4,857 posts)
📍 Somewhere out there

[ADMIN NOTE] I merged the threads for Bychye Serdtse (Bull’s Heart) and Cuor di Bue into one topic, because they are exactly the same thing genetically.

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anasst2010 (Anastasia) ⭐ Pro Grower (1,207 posts)
📍 Altai Territory, Siberia (USDA Zone 3)

Last summer, someone gave me a huge grocery bag full of tomatoes (I had almost none of my own ripening yet, as it was only the end of June). Some of them were absolute units, around 1.5 kg (3.3 lbs) 😳. It was Cuor di Bue. An 87-year-old grandma gave them to me; she’s been growing this same line for over 25 years, saving her own seed every season. Of course, I saved seeds from them immediately. 😛

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Ninulia (Nina) ⭐ Pro Grower (39,541 posts)
📍 Southeastern Nizhny Novgorod Region (USDA Zone 4)

Quote by anasst2010:

Some were about 1.5 kg… An 87-year-old grandma gave them to me… I saved the seeds.

Nastya, you have to grow those out this year and report back! If they really get that huge 😳, I’m calling dibs on seeds first! 😄

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anasst2010 (Anastasia) ⭐ Pro Grower (1,207 posts)
📍 Altai Territory, Siberia (USDA Zone 3)

Deal, I’ll definitely try! 😉 And I’ll spy on how the grandma grows them too 😶‍🌫️, I’ll be helping her out in the garden this summer anyway.

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Larek (Larisa) ⭐ Pro Grower (3,699 posts)

Mid-season, fruits take forever to ripen on the vine, the real sign of ripeness is a deep, rich red color. Indeterminate, it has a very wispy/weeping habit with skinny foliage. The tomatoes are large, oval-pear-shaped, ribbed at the shoulders, bright red, averaging 250-400g (9-14 oz). Very meaty, sweet. Barely any liquid/gel. Very few seeds. Stores well on the counter for quite a while. Highly productive.

I’ll add some info collected from the internet about this specific strain:
Imported from France. Differs from the Buffalo Heart that is common in Russia. Very expensive on the market and a rare variety! High-yielding. These are incredibly aromatic and juicy tomatoes. Indoors in a high tunnel, fruits can be picked right up until the end of October. Great balance of meat and juice, excellent variety for fresh eating, cooking, and canning. Wonderful balanced flavor. To really make the flavor pop, just add a pinch of salt and a drizzle of olive oil.

French Coeur de Boeuf tomato ribbed pear shape
Coeur de Boeuf tomato slices
Meaty interior of French Bull's Heart
Large harvest of Coeur de Boeuf tomatoes

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Larek (Larisa) ⭐ Pro Grower (3,699 posts)
Coeur de Boeuf tomato seed packet from France
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Mila (Lyudmila) ⭐ Pro Grower (8,411 posts)
📍 Moscow Region (USDA Zone 4)

Larisa, shape-wise, we have the exact same fruits 👍👍 In your photo, I also see that yours didn’t set the entire blossom cluster either 😳😳😳

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Larek (Larisa) ⭐ Pro Grower (3,699 posts)

I’m planting it again next season to observe. This summer I blame the fact that I planted the seedlings out too early, they got stunted by a late frost, and I planted the Corazons two-to-a-hole (double planted).

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Ovechka (Lyudmila) ⭐ Pro Grower (13,966 posts)
📍 Russia

Bull’s Heart from Olya in Voronezh (an old preserved family heirloom).
I grew this strain in 2012 and 2013.
The plants get tall with very sparse, wispy foliage. Fruits weigh anywhere from 250-550g (9-19 oz). Super sweet. Takes a bit longer to ripen than Pink Honey (Rozoviy Myod). Very heavy yielder.

In 2012 I grew it outdoors in the dirt. The plant got massive, was absolutely loaded with fruit, and ended up collapsing 😄 (I didn’t have a good enough stake for it). The seedlings always looked incredibly leggy and scrawny, both in 2012 and 2013.

In 2013 it grew in the greenhouse. 👍

Edited November 27, 2014 by Ovechka

Pink Bull's Heart on the vine
Large Bull's heart tomato hanging heavy
Classic pink oxheart tomato
Bull's Heart tomato cross section
Pink Oxheart tomato on a scale

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Pani Tomat (Irina) ⭐ Pro Grower (8,773 posts)
📍 Russia

Quote by Larek:

…Stores well on the counter for quite a while…

I have seeds of this tomato from T. Yashchenko. Good variety, productive, meaty and tasty. But I definitely wouldn’t call it a good keeper tomato. Probably just another weird translation issue on the seed packet.

Edited January 7, 2015 by Drosera

Yashchenko Bull's Heart tomato
Tomato plant loaded with oxhearts
Ripe oxheart tomato on scale

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Zelenoglazaya (Tatiana) 🌱 Beginner (37 posts)

Such a classic heirloom, everyone in our area grows it. We really love the taste, especially the pink and orange mutations.

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Tineke (Oksana) 🌱 Vegetable Expert (162 posts)

I have Bull’s Heart from the Aelita seed company.
From one packet, I ended up with two different strains growing out. Both are huge hearts, but one plant produced red ones and the other is pink.
Judging by the description on the back, the correct tomatoes should be red, but I absolutely loved the pink off-type/stray too.

And these are the pink ones:

Unfortunately, my old camera doesn’t want to capture the difference in color, but believe me, it’s there and very obvious in person. I’ll try to take some pictures outside, maybe the color rendering will be better in natural light.

Red Bull's Heart Aelita seeds
Another red Bull's Heart tomato
Pink strain of Bull's Heart from same packet
Pink Bull's Heart tomato on scale

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amarant (Alla) ⭐ Pro Grower (4,069 posts)
📍 Nizhny Novgorod (USDA Zone 4)

I grew this variety this year from Larisa (Larek), for which I owe her a huge thanks. I really loved this one. Tasty, meaty, moderately sweet–although I think due to all the overcast weather we had, it probably didn’t reach its full potential. Still, it set a ton of fruit both in the greenhouse and out in the dirt. The tomatoes get huge, so a lot of the clusters had to be supported with extra ties so they wouldn’t snap. Definitely growing this one again next season.

Large Bull's heart tomato in hand

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Lana_s_Kavkaza (Svetlana) ⭐ Pro Grower (19,262 posts)
📍 Pyatigorsk, Southern Russia (USDA Zone 6)

Seeds: Cuor di bue (Italian Bull’s Heart), grown from Czech seed stock. It grew into a slender vine up to 5-5.5 ft (1.5-1.7m) in the greenhouse. Fruits are a beautiful pink-raspberry color, tapering down to a perfect point, weighing up to 200g (7 oz). Beautiful shape, delicate, refined sweet taste, dense/meaty flesh, thick walls up to 5mm.

Cuor di bue Italian Bull's Heart tomato

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Lana_s_Kavkaza (Svetlana) ⭐ Pro Grower (19,262 posts)
📍 Pyatigorsk, Southern Russia (USDA Zone 6)

Bull Heart from Makedonia – Czech seeds. Medium-tall vines, mid-late season. The fruits have a gorgeous heart shape, delicate pink color, and sugary, delicious flesh.

Bull Heart from Makedonia tomato

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Rodebielesumer (Elena) ⭐ Pro Grower (1,832 posts)
📍 Germany/Luxembourg/France borders (USDA Zone 8)

Tomato “Cuor di Bue”, France (Bull’s Heart red) from Rossortsemovosh seed company. Every single one was large, dense, and tasty. Very productive variety.

Bull’s Heart from “Selektsiya” company: on the front of the packet it literally said “Best varieties and hybrids,” and advertised 800-gram monsters twice. Never happened. They were all in the puny 100-150 gram range (3.5-5.3 oz). When I took the photo there were 8 fruits, and a couple more set later. The flavor was excellent, to be fair. But a total rip-off otherwise. That’s the plant on the left. It also ripened way later than the next strain. Plant on the right.

Bull’s Heart from Aelita company. Photo taken on the exact same day as the previously described variety. It had 44 fruits on it! Even more set later-great for fresh eating and processing. 5 ft (1.5 meter) vines, absolutely loved everything about it.

All those tomatoes came from a single plant; on the left is the bottom sucker.

French Oxheart tomatoes on vine
Comparing two commercial Bull's Heart seed strains
Aelita Bull's Heart loaded with 44 tomatoes
Harvest of Bull's Heart tomatoes from a single bush

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

The differences between the regional strains are minimal – both are incredibly tasty, sweet, and meaty. I honestly wouldn’t be able to tell them apart by taste blindfolded.. Both have earned a permanent annual spot in my high tunnels.. 👍

Edited November 26, 2015 by Drosera

Two different strains of Bull's Heart tomato side by side
Slices of two Bull's Heart tomato strains showing identical meaty interiors

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pomidorka (Olga) 🌱 Vegetable Expert (114 posts)
Couldn’t find a photo of a fully ripe one. One of my absolute favorites ; heavy yielder, gorgeous, and delicious. Seeds were sourced directly from Italy.

 

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Serg (Sergey) ⭐ Pro Grower (6,381 posts)
📍 Kimry, Tver Region (USDA Zone 4)

I just can’t get “Cuor di Bue” to work for me, neither the red nor the black ones…. Maybe I’m doing something wrong — I get two, maybe three large tomatoes per vine, and that’s it….

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Danko (Elena) ⭐ Pro Grower (10,117 posts)
Perfect pink Bull's Heart oxheart tomato on scale
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Svetikk ⭐ Pro Grower (29,344 posts)
📍 Moscow / South Moscow Region (USDA Zone 4)

Grew Bull’s Heart from Portuguese seeds. Very productive variety, indet, pruned to 2 stems in the greenhouse, and it pumped out tons of pink hearts up to 10.5 oz (300g) all the way to the top of the vine 😳👍 The flavor was okay, just lacked a bit of sweetness, so it’s probably best as a sauce/canning tomato.

Portuguese Coracao de Boi tomato on vine
Large cluster of Portuguese Bull's Heart tomatoes
Pink Portuguese Bull's Heart tomatoes in a box

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LiliyaYa (Liliya) 👑 Moderator (11,777 posts)
📍 Rostov-on-Don (USDA Zone 6)

Grew the variety Cuor di Bue in 2015 from seeds I actually bought over in Italy:

Sowed on February 9, grew out in the open dirt, and the first harvest ripened on June 24. It actually ended up being the earliest of all my tomatoes.
The tomatoes, just like Svetikk’s, threw all sorts of different shapes and sizes, pink in color.

The vines get tall, around 6 ft (1.8m). I really loved the flavor, it had that classic sweetness. We sliced the large ones up for salads, and I used the smaller ones for pickling/marinating. They didn’t split when I canned them whole, even though the skins are pretty thin. They are prone to sunscald in intense summer heat, though, so they definitely benefit from some shade cloth.

Edited January 15, 2016 by LiliyaYa

Cuor di Bue Italian tomato seed packet
Cuor di Bue tomatoes varying in shape
Large Cuor di Bue tomato weighing over 400g
Sliced Cuor di Bue tomato
Canned whole Cuor di Bue tomatoes in a jar
Cuor di Bue pink tomatoes picked early

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Nata N. (Natalia) ⭐ Pro Grower (36,847 posts)
📍 Dmitrovka, Moscow Region (USDA Zone 4)

Photo of the seed packet:

Description on back:
A unique salad variety.
Popular mid-season variety for open ground and film greenhouses. Period from sprouting to the beginning of ripening 118-120 days. Plant height up to 150 cm (5 ft), requires staking, forms 4-5 trusses on the main stem with 2-5 fruits each. Fruits are pink, heart-shaped, weighing 110-225 g (4-8 oz). Excellent taste. Salad variety, recommended for fresh consumption.

My photos:

Started producing by day 97, extremely heavy yielder. There were about 50 seeds in the pack. The fruits on different vines grew into somewhat different shapes and colors. But all are large-fruited. The red-colored and round-shaped ones are a bit sour. The “Budenovka” shaped ones with pink flesh are incredibly tasty and sweet. Now, on day 106, I’m pulling 2-3 kg (4.4-6.6 lbs) of ripe fruit a day. I will definitely be saving seeds from the pink “Budenovka” shapes, I really loved them. As for the downsides — it gets yellow shoulders on almost every tomato (doesn’t bother me much, but my friend absolutely hates it). The second issue is blossom drop in the peak summer heat. Next time I’ll start the seeds earlier so they can set more fruit before the real heat hits.

Bull's Heart tomato seed packet
Basket of Bull's heart tomatoes showing yellow shoulders
Large ripe Bull's Heart tomato on scale
Meaty slices of Bull's Heart tomato

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Uriahp (Yuri) 🌱 Beginner (60 posts)
📍 Yaroslavl (USDA Zone 4)

The first ripe heart this year.
Seeds from Yaroslavna.

Red Bull's Heart tomato in hand

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Kostos Svetlana ⭐ Pro Grower (1,060 posts)
📍 Krasnodar, Southern Russia (USDA Zone 7)

German Bull’s Heart, seeds from Valichka

German Bull's Heart tomato on scale
Red German Bull's Heart tomato
Cross section of German Bull's Heart tomato

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Lvovna (Anna) ⭐ Pro Grower (2,131 posts)
📍 Yalta, Crimea (USDA Zone 8)

And here is how it went for me! At one of the Moscow seed swaps I scored some seeds from Portugal, Coracao de Boi (from Mikhail-Mishel – thank you hooooge amounts!). Sowed 2 seeds, grew 2 plants — completely different. One plant was super skinny/wispy, the other was a sprawling monster… one was absolutely loaded with raspberry-colored hearts, the other only gave me a handful of red ones… The raspberry ones seemed tastier, yielded way better, and the plant was more compact….. I saved seeds from both! But I’m definitely bringing the raspberry strain back next year — good hearts! Thanks again to Mikhail! 🎩 (In the photo, raspberry on the left, red on the right, in the foreground — Vater Rhein 😶‍🌫️!)

Comparing Portuguese Coracao de Boi strains

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Elena 62 ⭐ Pro Grower (2,063 posts)

I had seeds from Natasha-Yaroslavna and Angelina. When transplanting into the greenhouse, I mixed up my labels and forgot whose was whose. Pruned them to a single leader. The vine is just way too frail to support fruit of that size. The first blossom cluster only gave me one huge tomato, and the second cluster gave me two medium ones. Yes, the flavor is out of this world, but they were a total bust for me yield-wise.

Sliced Bull's Heart tomato on a cutting board

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Elena 62 ⭐ Pro Grower (2,063 posts)

But if I let them grow to two or three main stems, do you think the yield will go up? They are just painfully tasty. When I tried them, I immediately remembered my grandmother and the village, total childhood nostalgia. I will plant them again.

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

Grew it again this season — it didn’t let me down 👍

Large plate of beautiful pink Bull's Heart tomatoes

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Inna ⭐ Pro Grower (6,399 posts)
📍 Sverdlovsk Region, Ural (USDA Zone 3)

Quote by Lvovna:

And here is how it went for me!… I saved seeds from both! But I’m definitely bringing the raspberry strain back next year — good hearts!

Anya, and what kind will I get from your seeds — heart-shaped or round (thanks again for the gift 😘)? And how tall do the vines get?

Comparing Portuguese Coracao de Boi strains

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Nata N. (Natalia) ⭐ Pro Grower (36,847 posts)
📍 Dmitrovka, Moscow Region (USDA Zone 4)

This variety is permanently in my “Sowed, sow, and will always sow” category. I just love its excellent taste (a constant and extremely stable trait for this variety), its early-mid ripening window — it’s usually the second variety to ripen for me — excellent yield, and the vines are actually pretty sturdy (not wispy).

Edited November 23, 2018 by Nata N.

Perfectly shaped Bull's Heart tomato hanging on vine
Large ripe Bull's heart tomato in hand
Beautiful pink Bull's Heart tomato slices

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PolinaG (Natalia) ⭐ Pro Grower (2,779 posts)
📍 Yekaterinburg, Middle Urals (USDA Zone 3)

Bull’s Heart. Seeds from Alena.

Description:
Tomato Coeur de Boeuf Jerusalem (Bull’s Heart, Jerusalem), Israel – indeterminate, mid-season variety. Tomatoes are heart-shaped, slightly ribbed/fluted, pinkish-red, weighing 180-300 g (6-10 oz) and up to 500 g (1.1 lbs). Dense, raspberry-colored meaty flesh, practically seedless inside. Rich flavor profile heavily leaning towards sweet. Very productive variety, fruits have a great shelf life and can be stored for a long time after harvest.

I liked this strain very much. Completely matches the description. It’s early and a heavy yielder. The fruits are meaty and super sweet. Average fruit weight was 250-300 g (9-10.5 oz). Very few seeds.

Coeur de Boeuf Jerusalem tomato cut open
Large ripe Jerusalem Bull's Heart tomato
Massive Jerusalem Bull's Heart tomatoes
Beautiful pink heart tomato on scale
Jerusalem strain Coeur de Boeuf tomatoes

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