Black Plum Tomato Seeds

🍅 Black Plum Tomato Seeds

Price for Package of 5, 10, 50 seeds.

🍅 Black Plum Tomato is a productive Russian heirloom tomato prized for its distinctive elongated plum-shaped fruits, deep mahogany-brown coloring and rich, complex flavor. The vigorous indeterminate plants produce abundant crops over an extended season, making this variety an excellent choice for gardeners who want a versatile tomato for fresh eating, sauces, paste and preserving.

The fruits typically develop dark mahogany to brown coloring with green shoulders and reach approximately 5–8 cm (2–3 in) in length depending on growing conditions. They have a rich, smoky-sweet flavor with a pleasant tangy character. Black Plum is an open-pollinated variety and is well suited to both greenhouse cultivation and warm, sheltered outdoor locations. Independent horticultural sources confirm its Russian origin, indeterminate growth and approximately 70–80 day maturity range. :contentReference[oaicite:0]{index=0}

🌡️ Temperature Resistance and Cold Tolerance

Hardiness: Tender warm-season crop. Black Plum is a tomato and cannot tolerate frost. It should be planted outdoors only after the danger of frost has passed.

Growing temperature: Tomatoes perform best in warm conditions, with approximately 15–29°C (59–84°F) suitable for successful growth. :contentReference[oaicite:1]{index=1}

Germination temperature: Approximately 18–27°C (64–81°F), with warm soil particularly important for reliable emergence. Sources for Black Plum recommend germination around 18–24°C or 24–29°C depending on the growing medium and conditions. :contentReference[oaicite:2]{index=2}

Frost tolerance: 0°C (32°F) and below can cause severe damage or kill tomato plants. Protect young plants from unexpected late frosts and cold nights.

Outdoor planting: Wait until the soil has warmed and frost danger has passed. Black Plum is suitable for greenhouse cultivation and can also perform outdoors in a warm, sunny and sheltered position. :contentReference[oaicite:3]{index=3}

🌱 Plant Features

Botanical Name: Solanum lycopersicum

Type: Open-pollinated heirloom tomato

Growth Habit: Indeterminate

Origin: Russia

Fruit Shape: Elongated plum

Fruit Color: Mahogany-brown to dark brown with green shoulders

Fruit Size: Approximately 5–8 cm (2–3 in)

Flavor: Smoky, sweet and tangy

Maturity: Approximately 70–82 days depending on conditions

Position: Full sun

Use: Fresh eating, salads, sauces, paste, drying and preserving

🍅 Fruit Characteristics

Black Plum produces attractive elongated fruits with a characteristic mahogany-brown appearance. Green shoulders may remain visible as the fruit ripens, creating a distinctive contrast against the darker mature color.

The fruits are relatively firm and have a rich flavor that combines sweetness with a pleasant tang. Their shape and texture make them particularly useful for salads, sauces, cooking and preserving. Heritage Harvest Seed describes the variety as very productive, with plum-shaped mahogany fruits and regular foliage. :contentReference[oaicite:4]{index=4}

🌞 Growing Conditions

Light: Full sun, preferably at least 6–8 hours of direct sunlight daily.

Soil: Rich, fertile and well-drained soil with plenty of organic matter.

Position: Choose a warm, sheltered location protected from strong winds.

Water: Maintain consistent soil moisture, particularly during flowering and fruit development, while avoiding waterlogged conditions.

Feeding: Use a balanced fertilizer during early growth and switch to a tomato fertilizer with suitable potassium levels once flowering and fruit development begin.

🌱 Sowing Instructions

Sowing Time: Start indoors approximately 6–8 weeks before the last expected frost.

Sowing Depth: Approximately 3–6 mm (⅛–¼ in).

Germination Temperature: Approximately 18–27°C (64–81°F).

Germination Time: Usually around 5–14 days under suitable conditions.

Sow the seeds in a quality seed-starting compost and keep the growing medium evenly moist. Provide warmth and bright light after emergence. Black Plum seed-growing information from specialist suppliers recommends starting plants indoors before transplanting after the last frost. :contentReference[oaicite:5]{index=5}

🌿 Transplanting

When the seedlings have developed their first true leaves, transplant them into individual pots approximately 8–10 cm (3–4 in) wide.

Grow the young plants under warm, bright conditions and gradually acclimatize them to outdoor conditions before planting permanently.

Plant outdoors only once the risk of frost has passed and temperatures are consistently suitable for warm-season growth.

🪴 Plant Spacing and Support

Black Plum is an indeterminate, vigorous vine and requires sturdy support. Use stakes, strings, cages or a trellis to keep the plants upright.

Allow approximately 45–60 cm (18–24 in) between plants where growing conditions permit, with additional space between rows for airflow and access.

Because indeterminate tomatoes continue producing new growth throughout the season, regular tying and pruning helps keep the plant manageable and improves airflow around the foliage.

✂️ Pruning and Maintenance

Remove unwanted side shoots regularly if growing the plant as a single or limited number of main stems. Tie the main stems loosely to their support as they grow.

Remove yellowing or damaged lower leaves and maintain good airflow around the plant. Avoid excessive pruning of healthy foliage because leaves are essential for photosynthesis and fruit development.

💧 Watering

Keep the soil consistently moist rather than allowing it to alternate between very dry and saturated conditions. Water deeply around the root zone rather than frequently wetting the foliage.

Consistent moisture is particularly important when fruit is developing. Sudden changes in water availability can contribute to fruit splitting in tomatoes.

🌱 Feeding

Feed young plants with a balanced fertilizer during vegetative growth. Once flowering begins, use a fertilizer formulated for tomatoes and fruiting crops.

Avoid excessive nitrogen because it can produce vigorous foliage at the expense of flowering and fruit production.

🌾 Harvesting

Black Plum fruits can be harvested when they have developed their characteristic mature mahogany-brown color and the fruit has softened slightly.

Pick ripe fruits regularly to encourage continued production. The indeterminate plants can continue flowering and setting fruit for an extended period until cold weather and frost end the growing season. :contentReference[oaicite:6]{index=6}

Any mature green fruits remaining on the plants when frost approaches can be harvested and allowed to ripen indoors.

🍝 Culinary Uses

The combination of firm flesh, rich flavor and plum shape makes Black Plum particularly versatile. Use the fruits fresh in salads, sandwiches and vegetable dishes, or cook them into sauces and tomato paste.

The variety is also suitable for drying and preserving. Its concentrated, smoky-sweet flavor works especially well in cooked tomato dishes.

🌍 History and Origin

Black Plum is a Russian heirloom variety associated with Marina Danilenko of Moscow. It became known internationally through Seed Savers Exchange collections in the early 1990s. :contentReference[oaicite:7]{index=7}

The variety remains popular because of its combination of productivity, distinctive mahogany-colored fruit, indeterminate growth and rich flavor.

🐛 Pests and Diseases

As with other tomatoes, monitor plants for aphids, whiteflies, spider mites, caterpillars and fungal diseases. Good airflow, appropriate spacing and avoiding prolonged wet foliage can help reduce disease pressure.

Some sources report good disease performance for Black Plum, although disease resistance can vary according to seed source, growing conditions and local pathogen populations. Cornell’s vegetable variety database describes Black Plum as a disease-resistant Russian heirloom, while noting that further evaluation may be needed for specific late-blight resistance. :contentReference[oaicite:8]{index=8}

⚠️ Important Notes

Black Plum is an indeterminate tomato and requires support. Do not treat it like a compact bush or determinate variety.

Tomatoes are frost-sensitive. Do not transplant outdoors while freezing temperatures are still possible.

The exact fruit size, maturity time and productivity can vary with climate, cultivation method and seed source. Published sources place Black Plum at approximately 70–82 days to maturity. :contentReference[oaicite:9]{index=9}

This product is supplied in your selected package quantity of 5, 10 or 50 seeds.

Black Plum Tomato Seeds, Black Plum Seeds, Russian Black Plum Tomato, Black Plum Heirloom Tomato, Black Plum Paste Tomato, Black Plum Indeterminate Tomato, Russian Heirloom Tomato Seeds, Mahogany Tomato Seeds, Plum Tomato Seeds, Black Tomato Seeds, Heirloom Tomato Seeds, Tomato Seeds for Greenhouse, Tomato Seeds for Outdoor Growing, Smoky Sweet Tomato, Indeterminate Tomato Seeds