How to Grow Coeur d'Or Tomato
Coeur d'Or Tomato
Solanum lycopersicum 'Coeur d'Or'
vegetableCoeur d'Or is a French heirloom tomato variety known for its stunning golden-yellow color and heart-shaped fruits. These medium-sized tomatoes offer a rich, complex flavor with exceptional sweetness and low acidity, making them prized by gardeners and chefs alike.
When should you plant Coeur d'Or Tomato in your zone?
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Example Coeur d'Or Tomato timeline · Pittsburgh, PA (Zone 6b)
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Plant Coeur d'Or Tomato
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 Coeur d'Or Tomato
Around Jul 1≈ 75 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Coeur d'Or Tomato dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 5-9; can be grown in zones 3-4 with protection and extended season
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Seedling
3-4 weeksSmall seedlings with 2-4 true leaves appear 7-10 days after germination
Provide bright light 14-16 hours daily, keep soil moist but not soggy, maintain 65-75°F temperature
Vegetative
4-6 weeksRapid leaf and stem growth; plant becomes bushy with many branches and increasingly larger leaves
Transplant to larger pots as needed, support with stakes or cages, remove lower leaves once established to improve air circulation
Flowering
3-4 weeksYellow star-shaped flowers appear in clusters (inflorescences) along the main stem and side shoots
Continue consistent watering and feeding with balanced fertilizer. Ensure good air circulation to promote pollination. Avoid over-nitrogen feeding which favors foliage over fruit.
Fruiting & Development
4-6 weeksSmall green fruits form and gradually enlarge; color transitions from light green to pale yellow over 4-6 weeks
Reduce nitrogen, switch to phosphorus-rich fertilizer to support fruiting. Maintain consistent moisture to prevent cracking. Prune excess foliage to allow sun exposure on developing fruits.
Ripening & Harvest
2-3 weeks per fruitFruits reach full golden-yellow color with slight softness when gently squeezed; flavor becomes sweeter and more complex
Pick fruits at full color for peak flavor. Harvest in morning when cooler. Leave stems attached if storing. Can pick at mature green stage and allow to ripen indoors.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Handpick regularly, encourage parasitic wasps, use Bt (Bacillus thuringiensis), inspect undersides of leaves
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Use insecticidal soap, reflective mulch, yellow sticky traps, neem oil spray on leaf undersides
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Select resistant varieties when possible, improve soil drainage, remove infected plants, rotate crops annually
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Remove lower leaves, improve air circulation, mulch soil, avoid overhead watering, apply copper or sulfur fungicides
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Spray with strong water, use insecticidal soap, encourage ladybugs and lacewings, apply neem oil
Uses
Fresh eating and slicing
CulinaryCoeur d'Or is exceptionally sweet with low acidity, making it ideal for fresh eating, slicing in salads, and serving as a table tomato. Its unique golden color provides visual appeal to dishes. [source]
Sauce and cooking
CulinaryThe rich, complex flavor translates beautifully into sauces, soups, and cooked dishes. Its lower acidity and sweetness create a more nuanced tomato flavor than standard varieties. [source]
Specialty ingredients
CulinaryPrized for gourmet cooking, fine dining, and chef preparations. Used in fresh preparations where visual distinction and superior flavor matter most. [source]
Seed saving
HouseholdAs a true-breeding heirloom variety, Coeur d'Or produces seeds that grow true to type, allowing gardeners to save seeds season to season. [source]
Pollinator support
WildlifeTomato flowers attract bees and other pollinators, making Coeur d'Or a beneficial plant for supporting garden pollinator populations. [source]
Harvest Tips
Pick when fruits are fully golden-yellow and yield slightly to gentle pressure. Flavor is best at full ripeness. Harvest in morning before heat. Fruits can be picked at mature green stage and ripened indoors at room temperature (68-72°F) in a paper bag. Store at room temperature, never refrigerate as cold damages flavor.
Fun Facts
- 🌱 Coeur d'Or ('Heart of Gold') is a French heirloom variety that has been grown in European gardens since at least the 1890s, prized for its exceptional flavor and striking appearance.
- 🌱 Despite being golden-yellow in color, Coeur d'Or has lower acidity than red tomatoes, making it one of the sweetest and most digestible tomato varieties available.
- 🌱 The heart-shaped fruits are not just visually distinctive—they develop this shape naturally due to the variety's genetics, making each tomato a work of art.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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