How to Grow Blauer Heinz
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Blauer Heinz
Solanum lycopersicum
vegetableBlauer Heinz is a rare German heirloom tomato variety known for its striking dark blue-purple color and rich, complex flavor. This indeterminate vine produces medium-sized fruits with thin skin and dense, flavorful flesh. It's a specialty variety prized by gardeners seeking unique, visually stunning tomatoes with exceptional taste.
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Example Blauer Heinz timeline · Pittsburgh, PA (Zone 6b)
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Plant Blauer Heinz
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Blauer Heinz
Around Jul 1≈ 75 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Blauer Heinz dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9; can be grown in zones 3-4 with protection and extended season
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Get my Blauer Heinz timeline →Growth Stages
Seedling
2-3 weeksSmall plants with 2-4 true leaves; cotyledons present. Very tender and susceptible to damping-off.
Provide bright light (14+ hours), maintain 70-75°F, water gently to avoid fungal issues. Bottom heat accelerates germination. Thin if crowded.
Vegetative Growth
3-4 weeks from transplant to first flowersPlants develop compound leaves and strong root systems. Stems become woody and thick. No flowers yet.
Harden off seedlings 7-10 days before transplanting outdoors. Install sturdy stakes or cages early. Pinch suckers on indeterminate varieties to direct energy to main stem and fruit production.
Flowering
2-4 weeksYellow flowers appear in clusters (inflorescences). Pollen is viable; flowers self-pollinate and benefit from gentle vibration.
Maintain consistent water and temperature (65-75°F ideal). Light feeding with balanced fertilizer or tomato-specific formula. Gently shake plants or use brush to improve pollination on cloudy days.
Fruit Development & Maturation
4-6 weeks from flower to mature fruitSmall green fruits develop and slowly enlarge. As they mature, the distinctive dark purple-blue color develops, especially with full sun exposure and cool nights (55-65°F).
Reduce nitrogen fertilizer; apply potassium and phosphorus. Maintain even moisture. Remove lower leaves after fruit sets to improve air circulation. Support heavy fruit clusters.
Harvest Readiness
Ongoing over 3-4 week periodFruits reach full size (medium, typically 3-4 inches diameter) with deep blue-purple coloration throughout. Flesh is dense and flavorful.
Harvest when color is fully developed and fruit yields slightly to gentle pressure. Can pick at full color stage for best flavor; will not improve ripeness off the vine.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick daily; encourage parasitic wasps; apply Bacillus thuringiensis (Bt) spray if severe
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Use reflective mulch, insecticidal soap, neem oil, or release parasitic wasps
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Increase humidity, spray with neem oil, dust with sulfur, release predatory mites
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Remove infected leaves promptly, improve air circulation, mulch to prevent soil splash, apply copper fungicide if needed
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Ensure excellent drainage and air flow, remove diseased foliage, apply sulfur or copper-based fungicide preventively
Uses
Fresh Slicing & Salads
CulinaryBlauer Heinz offers a rich, complex tomato flavor with sweet and slightly smoky notes. The thin skin and dense flesh make it excellent for fresh eating, particularly in salads and on sandwiches. [source]
Sauce & Preservation
CulinaryHigh solids content and complex flavor make this variety ideal for homemade tomato sauce, paste, and canning. The low water content produces concentrated, deeply flavored results. [source]
Visual Appeal & Display
HouseholdThe striking dark blue-purple color creates dramatic visual interest in the kitchen and on the dining table. Uncommon coloration makes it a conversation piece and suitable for farmers' market sales. [source]
Seed Saving & Heritage Gardening
CraftAs a stable heirloom variety, Blauer Heinz is excellent for seed saving. Gardeners can preserve this rare German cultivar and maintain genetic diversity. [source]
Antioxidant-Rich Nutrition
MedicinalThe purple color indicates high anthocyanin and lycopene content, providing antioxidant benefits. These compounds are associated with cardiovascular and cancer-preventive properties. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Blauer Heinz reaches peak flavor when fully colored and slightly soft to touch. Harvest by gently twisting and pulling from the vine. The unique dark purple color is a key indicator of ripeness. Best flavor develops with full sun exposure and moderate temperatures. Can be harvested at the 'breaker stage' (first color showing) and ripened indoors if frost threatens, though vine-ripened fruit is superior.
Fun Facts
- 🌱 Blauer Heinz is a rare German heirloom variety that nearly disappeared from cultivation; it was rediscovered and preserved by seed savers in Germany and is now experiencing renewed interest among gardeners seeking unique varieties.
- 🌱 The distinctive blue-purple color develops due to anthocyanin pigments similar to those found in blueberries. Full sun exposure and cooler nighttime temperatures (55-65°F) intensify the coloration.
- 🌱 The name 'Heinz' refers to the original German seed company, not the condiment maker. This variety represents culinary tradition and is considered a treasure among European heirloom tomato enthusiasts.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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