Black Prince Heirloom Tomato (Lycopersicon lycopersicum 'Black Prince')

Black Prince Heirloom Tomato

Lycopersicon lycopersicum 'Black Prince'

Rich, deep purple fruit holds sun-warmed sweetness. Heirloom fruiting annual; common name: Black Prince Tomato.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun required for optimal fruit production; tolerate partial shade in extreme summer heat to prevent sunscald on ripe fruit
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Watering Water deeply at the base of the plant to avoid wetting foliage, which reduces fungal disease risk; allow the top 5cm of soil to dry between waterings
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Temperature Thrives in warm daytime temperatures of 21–27°C; avoid frost and temperatures above 38°C, which can inhibit flower pollination and fruit set
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Characteristics

  • Leaf: Compound pinnate leaves with fuzzy, dark green foliage
  • Flower: Small, yellow star-shaped blooms in terminal clusters
  • Fruit: Round, deep purple-black tomatoes with green shoulders when unripe, ripening to a rich crimson-purple
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Care Guide

Watering

Keep soil consistently moist during active growth and fruiting; avoid waterlogging to prevent root rot

Fertilization

Apply balanced organic fertilizer every 2 weeks during vegetative growth. Avoid over-fertilizing with nitrogen, which can promote excessive foliage growth at the expense of fruiting

Banana peel compost tea:Compost banana peels for 2 weeks to break down nutrients, steep in water for 24 hours, dilute 1:20 with water before applying as a root drench; avoid using uncomposted peels to prevent pest infestations
Pruning
  • Remove suckers (side shoots between main stem and branches) to direct energy to fruit production
  • Trim lower foliage to improve airflow and reduce the risk of soil-borne fungal diseases
  • Harvest ripe fruit regularly to encourage continued blooming and extended fruiting
  • Remove yellowing or diseased leaves promptly to prevent spread of pathogens
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Solanine in foliage and unripe fruit may cause vomiting, diarrhea, and lethargy if ingested

Humans: Ripe fruit is safe for consumption; unripe fruit and foliage contain solanine, causing mild gastrointestinal irritation if ingested in large quantities

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Garden Uses & Culture

Culture: Represents heirloom gardening heritage and the value of homegrown culinary ingredients

Usage: Ripe fruit is edible raw or cooked for sauces, salads, and preserves; foliage adds ornamental texture to edible gardens