'Blaukönigin' Eggplant - Solanum melongena

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Traditional cultivation method & heirloom variety. Genetically stable & open-pollinated - 100% free from hybrid breeding, GMOs, and synthetic fertilizers. Organically propagated - Non-proprietary variety.

Local pickup at Benjis Seeds

Bohnensamen2

Harvest year:

2022

Seed viability:

9 years (species-specific)
Detailed information on germination capacity

Description

Cultivation & Characteristics

Tips & Reviews

'Blaukönigin' Eggplant – robust traditional variety with royally dark violet fruits. 

This old variety is a proven eggplant with dark violet, glossy fruits and tender, creamy flesh. It ripens reliably and is ideally suited for greenhouses, protected outdoor beds, and pot cultivation. Robust, high-yielding, and open-pollinated – perfect for self-sufficiency and organic growing.

 

  Origin & History

‘Blaukönigin’ is an open-pollinated variety with a long history in European vegetable cultivation. For decades, it was grown and passed on in home gardens and small farms. Its name refers to the deep dark, almost black coloration of the glossy fruits, which make it a striking presence in the vegetable garden. Originally developed as a traditional landrace in Central Europe, it proved itself through robustness and adaptability. Especially in Germany and neighboring regions, it was for generations a staple of peasant self-sufficiency and was passed on as a reliable, high-yielding variety.

Its deep dark to variably bluish fruits were considered a mark of quality and used in many ways. In rural regions, it symbolized the importance of open-pollinated crops that could be shared independently of commercial breeding. With industrialization and the spread of modern hybrids, however, ‘Blaukönigin’ largely fell into obscurity during the 20th century. Today, it is once again maintained by organic seed initiatives and conservation organizations and valued as a historic rarity. To this day, ‘Blaukönigin’ stands as a symbol of freely accessible, non-patented crops and the preservation of biodiversity in the vegetable garden.

 

  Appearance & Characteristics

The plant grows vigorous and upright, reaching a height of about 60 cm. It produces numerous fruit clusters and bears strong, dark green foliage with characteristic violet leaf veins.

Fruit details:

  • Size: Medium to large, approx. 200-300 g per fruit

  • Shape: Elongated-oval, approx. 15-20 cm long

  • Color: Light blue to dark violet, almost black, glossy

  • Texture: Tender, creamy flesh

  • Flavor: Mild, slightly nutty - versatile in use

 

 Usage & Cultivation Highlights

The fruits are excellent for frying, grilling, baking, and especially stuffing. Their mild, slightly nutty flavor and glossy dark violet skin make them a true eye-catcher in Mediterranean dishes, adding a special visual and culinary touch.

Thanks to its vigorous growth and resilience, the variety thrives reliably in greenhouses, protected outdoor beds, and especially in large pots. It ripens consistently, produces abundant fruits, and impresses with its versatility. In addition, it is easy to care for, adapts well to different locations, and delivers stable yields even under changeable weather conditions. Its decorative dark violet fruits ripen evenly, making the plant not only a culinary but also a visual highlight in the garden.

Compared to other eggplants, ‘Blaukönigin’ is proven, particularly reliable, and highly ornamental – ideal for those who appreciate open-pollinated eggplants with classic appearance and long tradition.

Cultivation_Overview_-_Anbau_im_Uberblick_-_Visao_geral_do_cultivo_-_www

Origin & Cultivation at a Glance

First mention:

Not known - traditional heirloom variety

Origin:

Not officially documented

Breeder:

Not officially known – distributed through preservation initiatives

Propagation site:

Alentejo - Portugal

Suitable for:

Open field, Greenhouse, Polytunnel, Balcony / pot, Urban gardening, Vertical cultivation

Care requirements:

Low – easy to care for, ideal for beginners.

Overwintering:

Not winter-hardy – can be cultivated outdoors as an annual. Can be overwintered in a greenhouse in mild climates.

Special features:

High-yielding, Sun-loving / sunny, Low-maintenance, Resilient, Heat-tolerant
Plant_Growing_Instructions_-_Pflanzen_Anbau-Anleitung_-_Instrucoes_de_cultivo_de_plantas_-_www

Cultivation guide for

<tc>Blaukönigin</tc>

Growing difficulty:

Easy
In subtropical climates, pre-cultivation is possible from January - transplant outdoors from March in full sun, once day and night temperatures remain consistently above 15 °C.
In temperate regions, start indoors from March – transplant outdoors in full sun from mid-May after the last frost.
Sow in deep, well-drained, humus-rich and nutrient-rich loamy soil - 0.5-1 cm deep. Plant spacing: 50 × 70 cm.

Cultivation tips:

Eggplants are heat-loving and thrive only at temperatures above 20 °C.
At temperatures below 15 °C, plant growth slows significantly - cold stress can inhibit development.
In temperate climates, a rain cover is recommended – a simple roof or plastic tunnel is sufficient.
Bring pots indoors or into the greenhouse in autumn – this way the season can be significantly extended.
Consistent watering enhances fruit quality and promotes healthy plant growth.
Regular harvesting encourages new fruit set and increases overall yield.
Biochar and rock dust improve soil structure and enhance the retention of nutrients and water.

Storage instructions:

Store seeds in a cool, dry, dark, and airtight environment to maximize shelf life and germination.
Detailed information on seed storage
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Plant Profile

Plant details

Botanical name:

<tc>Solanum melongena L. 'Blaukönigin'</tc>

Botanical family:

Solanaceae

Plant type:

Fruit vegetables

Life cycle:

Perennial (grown as an annual)

Cultivation period:

8-9 months

Growth habit:

Upright growth, Compact

Plant width:

50 cm

Plant height:

60 cm

Root type:

Shallow to moderately rooted

Hardy to:

Not hardy - sensitive to cold. Growth is severely damaged below 10 °C, frost-sensitive.

Cultural meaning:

Historical, Traditional

Suitability for cultivation and use:

Summer crop, Peak season, Self-sufficiency, Biodiversity, Variety conservation, Educational projects / School garden, Direct marketing, Processing

Propagation method:

Generative propagation by seed

Propagation:

This variety belongs to the species Solanum melongena and is predominantly self-pollinating.
For seed production, a minimum distance of 50–100 m from other varieties of the same species is recommended to prevent cross-pollination.
The plant is perennial - after flowering, the typical fruits develop, which at full maturity contain numerous seeds.
Seeds are ready for harvest once the fruits are fully matured, change color, and the flesh begins to dry out.

Sowing & Planting

Germination type:

Dark germinator, Warm germinator

Sowing depth:

0,5-1 cm

Germination temperature:

25-28 °C

Germination time:

6-14 days

Pot culture:

Requires a minimum container size of 15-20 liters.

Row spacing for baby leaf:

Not suitable for baby-leaf cultivation.

Plant spacing:

50 cm

Row spacing:

70 cm

Pricking out / thinning out:

3-4 weeks, thin out after formation of the first true leaf pairs.

Planting time:

Tomato seedlings are ready to be planted outdoors about four weeks after potting up, once temperatures are consistently warm. Plant only in consistently warm weather – ideally after the last frosts, when both daytime and nighttime temperatures are mild.

Soil

Soil type:

Deep, well-drained, humus-rich loam

Soil pH:

6.0-6.8 - slightly acidic to neutral

Nutrient requirements:

Heavy feeder

Soil moisture:

Evenly moist, Sensitive to waterlogging

Soil preparation:

Loosen soil deeply before sowing, Apply compost before planting., Apply lime to acidic soil., Prepare soil weed-free and with a fine crumb structure., Mulch layer for moisture regulation

Companion planting, Crop rotation & Harvest

Companion plants:

Lettuce, Lamb’s lettuce, Spinach, Bean, Carrot, Radish varieties, Onion, Garlic, Basil, Oregano, Marjoram, Thyme, Calendula, Tagetes

Incompatible plants:

Fennel, Cucumber, Zucchini, Tomato, Pepper / Chili pepper, Pea, Celery, Potato

Crop rotation guidelines:

Do not plant after other nightshades – a minimum crop rotation interval of 3 years is recommended.
Repeated cultivation at the same site increases disease pressure, leads to nutrient depletion, and impairs soil structure.
Ideal previous crops include legumes, onions, root vegetables, and green manure – rotating crops supports healthy soil.
Crop rotation with low-nutrient-demanding plants is recommended to prevent soil fatigue and maintain healthy growing conditions.
Plan a green manure crop between heavy-feeding plants and this tomato variety to restore soil fertility.
Avoid planting directly after heavy-feeding crops – allow the soil to recover and replenish nutrients first.

Harvest time:

Summer, Autumn

Sowing to harvest:

5-6 months

Harvested parts:

Fruits

Suitable for consumption:

Yes - edible when cooked.

Intended use:

Diet cuisine, Low Carb, Steaming, Roasting, Grilling, Baking, Deep-frying, Stuffing, Pickling, Fermentation, To purée, Preserving

Care & Cultivation practices

Water requirements:

High

Plant care techniques:

Water regularly - even during dry periods, Fertilize, Maintain weed-free, Inspect regularly for pest infestation

Plant protection:

Well-ventilated location and good drainage recommended., Check early for aphids., Mulching recommended

Cultivation notes:

May develop mildew in damp weather – an airy location is recommended. Susceptible to slugs and snails in early development. At a later stage, the hardier leaves are less vulnerable. Can be infested by aphids - occasional monitoring recommended. Sensitive to waterlogging – use well-drained soil.

Other names

EN - English names:

EggplantAubergine

DE - German names:

AubergineEierfrucht

PT - Portuguese names:

Beringela

ES - Spanish names:

Berenjena

FR - French names:

Aubergine
Practical_Planting_and_Care_Tips_-_Praktische_Aussaat-_und_Pflegetipps_-_Dicas_praticas_de_sementeira_e_cuidados_-_www

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