How to Grow Colossus Gold
Colossus Gold
Solanum lycopersicum 'Colossus Gold'
vegetableColossus Gold is a large beefsteak tomato variety known for its impressive golden-yellow fruits that can weigh 1-2 pounds each. This indeterminate heirloom tomato produces sweet, meaty fruits with few seeds and excellent flavor, making it a favorite for slicing and fresh eating. The plants are vigorous growers that require staking and pruning for optimal production.
When should you plant Colossus Gold in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Colossus Gold timeline · Pittsburgh, PA (Zone 6b)
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Plant Colossus Gold
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 Colossus Gold
Around Jul 1≈ 75 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Colossus Gold dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9; can be grown as annual in zones 3-4
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Seedling
2-3 weeksSmall plants with 2-3 true leaves; cotyledons present
Keep soil moist but not waterlogged; provide 14-16 hours of bright light daily; maintain 70-75°F
Vegetative
3-4 weeksRapid stem and leaf growth; plant develops 6-8 true leaves before flowering begins
Provide strong light and begin hardening off transplants; stake plants early; remove lower leaves as plant grows
Flowering
3-4 weeksYellow flowers appear in clusters; flowering begins around 4-6 weeks after transplanting
Maintain consistent watering and temperature (65-85°F); ensure adequate pollination; apply balanced fertilizer weekly
Fruiting
4-6 weeksGreen marble-sized fruits develop after flowering; fruits enlarge significantly over 4-6 weeks
Reduce nitrogen fertilizer; increase potassium and phosphorus; prune suckers to direct energy to fruit; water consistently
Ripening & Harvest
1-2 weeks per fruitFruits transition from green to golden-yellow when fully ripe; interior becomes soft and sweet
Harvest fully ripe fruits for best flavor; allow some fruits to ripen on vine; pick green fruits before frost
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick; encourage parasitic wasps; Bacillus thuringiensis (Bt) spray; monitor regularly
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Yellow sticky traps; insecticidal soap; neem oil; strong water spray to dislodge
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Increase humidity; spray with water; neem oil; miticide if severe
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Remove affected leaves immediately; improve air circulation; mulch to prevent soil splash; copper fungicide
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Remove infected foliage; apply copper or chlorothalonil; ensure good drainage; avoid overhead watering
Uses
Fresh slicing and salads
CulinaryColossus Gold's large, meaty fruits are ideal for slicing into thick slices for sandwiches, salads, and fresh eating. The low seed content and sweet flavor profile make it superior to many commercial varieties. [source]
Sauce and cooking
CulinaryWith high flesh content and concentrated flavor, these golden tomatoes are excellent for making fresh tomato sauce, pasta sauce, and cooked dishes. The sweetness adds depth to savory preparations. [source]
Seed saving
HouseholdColossus Gold is an heirloom open-pollinated variety, making it ideal for seed saving. Gardeners can save seeds from mature fruits and replant them year after year. [source]
Aesthetic presentation
CulinaryThe striking golden-yellow color makes these tomatoes visually distinctive and appealing for table presentation, plating in fine dining, and garden photography. [source]
Nutritional benefits
MedicinalLike all tomatoes, Colossus Gold is rich in lycopene, vitamins C and K, potassium, and antioxidants that support heart health and overall wellness. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when fruits are fully golden-yellow and slightly soft to gentle pressure; color develops fully off the vine if needed; fruits picked at the breaker stage will ripen indoors; typically harvest 75-85 days after transplanting; cut stem with pruners to avoid damaging plant
Fun Facts
- 🌱 Colossus Gold can produce individual fruits weighing up to 2 pounds, making them among the largest golden tomato varieties available to home gardeners.
- 🌱 The golden-yellow color develops fully on the vine and indicates peak ripeness and maximum sugar content, unlike many red tomato varieties.
- 🌱 As an indeterminate variety, Colossus Gold continues to grow and produce fruit throughout the season until frost, potentially yielding 15-25+ large fruits per plant in favorable conditions.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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