Black Russian Tomatoes: Heirloom Variety Guide
Black Russian tomatoes are a classic heirloom variety prized for their deep, dark colouring and rich, complex flavour. With their dusky red-brown skin and hints of purple and green, these tomatoes stand out visually as well as on the plate. For gardeners who value flavour, character, and heritage varieties over uniform supermarket-style fruit, Black Russian tomatoes are a rewarding choice.
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This heirloom variety guide explains how to grow Black Russian tomatoes successfully, covering sowing, planting, care, watering, feeding, harvesting, and common issues. With the right conditions, Black Russian tomatoes produce generous crops of flavour-packed fruits that are perfect for fresh eating and gourmet cooking.
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What Are Black Russian Tomatoes?
Black Russian tomatoes are an heirloom (open-pollinated) cordon tomato variety. They produce medium-sized, round to slightly flattened fruits with a distinctive dark colouring that deepens as the tomatoes ripen.
The colour ranges from deep reddish-brown to dark mahogany, often with green shoulders. The flesh is juicy but meaty, with a rich, savoury flavour often described as smoky, earthy, and slightly sweet.
Black Russian tomatoes are primarily grown for fresh eating, slicing, salads, and gourmet dishes, where their flavour can shine.
Why Grow Black Russian Tomatoes?
Black Russian tomatoes are grown for quality rather than uniformity or long shelf life. They appeal particularly to gardeners who enjoy traditional and heirloom varieties.
Key reasons to grow them include:
• Exceptional, complex flavour
• Striking dark-coloured fruits
• Heirloom, open-pollinated variety
• Good yields with proper care
• Excellent for fresh eating and cooking
They are often considered one of the best “black” or dark-fruited tomato varieties for home gardens.
Best Place to Grow Black Russian Tomatoes
Black Russian tomatoes grow best under cover in the UK but can also be grown outdoors in favourable conditions.
Greenhouse or Polytunnel
These provide the most reliable environment. Stable temperatures, protection from rain, and improved light levels help fruits ripen evenly and develop full flavour.
Outdoors
Outdoor growing is possible in warm, sheltered locations with good airflow. Choose a sunny spot protected from strong winds and prolonged rain.
Containers
Black Russian tomatoes grow well in large containers and grow bags, making them suitable for patios and smaller gardens if well cared for.
When to Sow Black Russian Tomato Seeds
In the UK, Black Russian tomatoes are best sown indoors from late February to late March.
For outdoor growing, sowing in late March produces sturdier plants that cope better with open-ground conditions. Earlier sowing is suitable if you have grow lights or a heated propagator.
Seeds germinate best at temperatures between 18–22°C and usually emerge within 7–14 days.
Avoid sowing too early without enough light, as seedlings may become tall and weak.
How to Sow Black Russian Tomato Seeds
Fill clean pots or seed trays with fine, moist seed compost. Sow seeds thinly on the surface and cover lightly with compost or vermiculite.
Water gently and place containers in a warm location. Once seedlings emerge, move them into bright light immediately.
When the first true leaves develop, prick seedlings out into individual pots. Always handle seedlings by their leaves rather than the stems to avoid damage.
Growing Conditions for Black Russian Tomatoes
Light
Black Russian tomatoes need plenty of sunlight to develop their dark colouring and rich flavour. Aim for at least 6–8 hours of direct sunlight per day.
Temperature
Ideal growing temperatures are between 18–24°C. Growth slows below 10°C, and frost will kill plants. Protect plants from cold nights early and late in the season.
Airflow
Good airflow reduces disease risk and improves pollination. Space plants well and ventilate greenhouses regularly.
Planting Black Russian Tomatoes
When to Plant Out
Under cover, plant out from late April to early May once temperatures are stable. Outdoors, wait until late May or early June, after all risk of frost has passed.
Harden plants off gradually over 7–10 days before planting outdoors.
Spacing
Space plants 45–60cm apart to allow for strong growth and good airflow.
Planting Depth
Plant tomatoes deeply, burying the stem up to the first set of leaves. This encourages strong root development and improves plant stability.
Growing Black Russian Tomatoes in Containers
Choose containers at least 30–35cm deep and wide. Use high-quality compost designed for vegetables or tomatoes.
Ensure containers drain freely. Container-grown plants dry out more quickly and require more frequent watering and feeding than ground-grown plants.
Position containers in the sunniest, most sheltered spot available.
Supporting and Training Black Russian Tomatoes
Black Russian tomatoes are cordon plants and need support.
Use tall canes, strings, or spiral supports. Tie the main stem loosely as it grows, checking ties regularly to prevent damage.
Removing Side Shoots
Side shoots grow between the main stem and leaf joints. Remove these regularly to maintain a single-stem structure.
Pinching out side shoots when small keeps plants tidy and directs energy into fruit production.
Watering Black Russian Tomatoes
Consistent watering is essential for good fruit quality and flavour.
Water deeply and regularly, keeping soil or compost evenly moist. Avoid letting plants dry out completely, followed by heavy watering, as this can cause fruit splitting.
Always water at the base of the plant and avoid wetting foliage to reduce disease risk.
During hot weather, greenhouse and container-grown plants may need watering daily.
Feeding Black Russian Tomatoes
Once flowers appear and the first fruits begin to form, start feeding with a high-potassium tomato feed.
Feed weekly, increasing frequency slightly for container-grown plants. Balanced feeding supports fruit development and enhances flavour.
Avoid excessive nitrogen, which promotes leafy growth at the expense of fruit quality and flavour.
Flowering and Pollination
Black Russian tomatoes are self-pollinating, but good conditions improve fruit set.
In greenhouses, gently tapping plants or supports on warm days helps release pollen. Good ventilation and stable temperatures also improve pollination success.
Cold nights or extreme heat can reduce fruit set.
Harvesting Black Russian Tomatoes
Black Russian tomatoes are ready to harvest when fruits have developed their deep, dark colouring and feel slightly soft to the touch.
Unlike bright red tomatoes, colour alone can be misleading. Fully ripe fruits often retain green or darker shoulders, so gently squeeze to check ripeness.
Harvest regularly to encourage continued cropping. Fully ripe fruits have the richest flavour.
Flavour and Culinary Uses
Black Russian tomatoes are best used fresh or lightly cooked.
They are ideal for:
• Slicing and salads
• Gourmet sandwiches
• Roasting
• Sauces with deep flavour
• Fresh eating with minimal seasoning
Their rich taste pairs well with simple ingredients, allowing the flavour to stand out.
Common Problems with Black Russian Tomatoes
Fruit Splitting
Usually caused by irregular watering. Maintain consistent moisture levels.
Yellowing Leaves
Some yellowing of lower leaves is normal as plants mature. Widespread yellowing may indicate nutrient imbalance or watering issues.
Poor Fruit Set
Often caused by low temperatures or poor ventilation. Improve airflow and maintain stable conditions.
Tomato Blight
Not blight-resistant. Reduce risk by improving airflow, avoiding wet foliage, and removing affected leaves promptly.
Saving Seeds from Black Russian Tomatoes
Black Russian tomatoes are open-pollinated, making them ideal for seed saving.
Allow fruits to fully ripen. Scoop out the seeds, ferment briefly in water, rinse thoroughly, and dry completely before storage.
Store seeds in a cool, dry place and label clearly. Saved seeds usually grow true to type.
When to Stop Black Russian Tomato Plants Growing
Towards late summer, usually around August, pinch out the growing tip above the final truss you want to ripen.
This focuses energy on ripening existing fruit rather than producing new flowers that will not mature before cooler weather arrives.
Remove flowers and very small green fruits as autumn approaches.
Tips for Best Results
• Grow plants in full sun
• Water consistently
• Feed regularly once fruiting begins
• Remove side shoots frequently
• Improve airflow around plants
• Harvest fruit fully ripe for best flavour
Attention to these details makes a noticeable difference to flavour and yield.
Final Thoughts
Black Russian tomatoes are a standout heirloom variety for gardeners who value flavour, character, and traditional tomato growing. Their dark, dramatic appearance and rich, savoury taste make them one of the most rewarding tomatoes to grow at home.
With correct sowing, steady watering, balanced feeding, and proper training, Black Russian tomatoes can produce generous crops of distinctive, flavour-packed fruit. For gardeners looking to grow something a little different — and exceptionally tasty — Black Russian remains a classic and highly satisfying choice.