Description
Solanum lycopersicum ‘Oma’s Orange’ is an heirloom tomato variety appreciated for its large, glowing orange fruits and mild, sweet flavor with low acidity. The indeterminate plants are vigorous and productive, commonly reaching 1.8 to 2.4 meters in height, and require staking or caging to support the heavy fruit set. The tomatoes are typically smooth, round to slightly flattened, with firm yet juicy flesh that is excellent for fresh slicing, salads, and colorful culinary presentations.
This variety performs best in full sun and fertile, well-drained soil with consistent moisture. Good airflow and support help maintain plant health and fruit quality throughout the growing season.
Sow seeds indoors 6 to 8 weeks before the last expected frost date. Transplant outdoors after all danger of frost has passed and nighttime temperatures remain consistently above 12°C to 14 °C. In warm, frost-free climates, seeds may be sown from late winter to early spring for optimal growth and production.
Germination Guide
🌍 USA - Ohio family heirloom since 1937
Easy
Solanum lycopersicum 'Oma's Orange' is an American heirloom tomato variety with a rich family history dating back to 1937 in Ohio. This indeterminate cultivar produces large, glowing orange beefsteak fruits with mild, sweet flavor and low acidity. Seeds germinate readily in warm, moist conditions without requiring any special pre-treatment, making this variety among the easiest to grow from seed.
Germination
Germination time
Expect germination in
5 – 10 days
Temperature
Min 70°C
Ideal 75°C
Max 85°C
Light
🌑 Darkness required
Substrate moisture
💧 Medium
Sowing depth
Lightly covered
Substrate & Container
Recommended substrate
Seed starting mix or potting soil, sterile and soilless
Recommended container
Small containers or seed trays with drainage holes
Growing Tips
For fastest germination (5-6 days), maintain soil temperature at 75-85°F using a horticultural heat mat, with 75-80°F being optimal. Seeds do not require light to germinate but must be lightly pressed into soil for good seed-to-soil contact. Use sterile, soilless seed-starting mix and keep consistently moist (not waterlogged) under high humidity. Bottom watering is strongly recommended to prevent damping-off disease. Once seedlings emerge (about 75% of tray), provide bright light for 14-16 hours daily and reduce temperature to 60-70°F to prevent leggy growth. Avoid planting too deeply—seeds should be 1/4 inch deep maximum. Transplant into 3-inch pots when seedlings develop 2-3 true leaves. Harden off gradually over 7-10 days before transplanting outdoors after the last frost date when soil temperature reaches at least 70°F (ideally 60°F minimum air temperature).
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