Solanum lycopersicum
Sunlight
Full sun — minimum 6-8 hours direct sunlight daily
Water
Regular, consistent watering — 25-50 mm per week. Avoid overhead irrigation to reduce foliar disease. Drip irrigation ideal.
Soil
Well-drained, fertile loam with pH 6.0-6.8. Rich in organic matter. Avoid waterlogged or compacted soils.
Temperature
Optimal 21-27°C daytime, 15-20°C nighttime. Fruit set fails above 35°C or below 10°C.
Humidity
Moderate (50-70%). High humidity promotes foliar diseases (late blight, bacterial spot).
Season
Warm season — plant after last frost. In tropics, can be grown year-round with irrigation.
Updated February 2026
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Overview
The tomato is the world's most widely grown vegetable crop, cultivated across every continent except Antarctica. A warm-season crop requiring 60-90 days to fruit maturity, tomatoes are grown commercially and by smallholder farmers throughout the tropics, subtropics, and temperate regions. They are rich in lycopene, vitamins A and C, and potassium. Tomatoes can be grown in open fields, greenhouses, or containers. They are classified as determinate (bush type, sets fruit all at once) or indeterminate (vining, continuous production). Major production regions include China, India, Turkey, the United States, and Egypt. In sub-Saharan Africa, tomato is the most important vegetable crop, providing income and nutrition to millions of smallholder farming families.
Plant Health
Tomato is susceptible to 6 known diseases. Early detection is critical — use the CuraPlant app to scan leaves and get an instant AI diagnosis.
Tomato Early Blight
Tomato early blight is caused by the fungus Alternaria solani. It produces dark brown spots with concentric rings on lower leaves, spreading upward. Manage with crop rotation, resistant varieties, mulching to prevent soil splash, and fungicide applications of chlorothalonil or copper-based products when symptoms first appear.
Tomato Late Blight
Tomato late blight is caused by Phytophthora infestans. It creates water-soaked gray-green lesions that rapidly turn dark brown, with white mold on leaf undersides in humid conditions. It can destroy crops in days. Apply preventive copper or mancozeb sprays, destroy infected plants immediately, and use resistant varieties like Mountain Magic or Defiant.
Tomato Yellow Leaf Curl Virus
Tomato yellow leaf curl virus (TYLCV) is a begomovirus spread by whiteflies (Bemisia tabaci). Infected plants show upward leaf curling, yellowing leaf margins, stunted growth, and flower drop. There is no cure — management relies on resistant varieties, whitefly control with neem or imidacloprid, reflective mulches, and insect-proof netting.
Tomato Fusarium Wilt
Tomato Fusarium wilt (Fusarium oxysporum f. sp. lycopersici) causes yellowing starting on one side of the plant, wilting, and brown vascular discoloration in stems. The fungus persists in soil for decades. Manage with resistant varieties carrying I, I-2, I-3 genes, grafting onto resistant rootstock, crop rotation, and raising soil pH to 6.5-7.0.
Tomato Bacterial Wilt
Tomato bacterial wilt (Ralstonia solanacearum) causes sudden, rapid wilting of entire plants without yellowing. Cut stems placed in water ooze milky white bacterial streaming. There is no chemical cure. Use resistant varieties, crop rotation with non-solanaceous crops, grafting onto resistant rootstock, and strict sanitation. The bacterium persists in soil and irrigation water.
Powdery Mildew
Powdery mildew appears as white powdery spots on leaves and stems, caused by Erysiphe or Podosphaera fungi. It thrives in warm, dry weather with high humidity. Manage with sulfur sprays, potassium bicarbonate, neem oil, proper spacing for airflow, and resistant varieties. Unlike most fungal diseases, it does NOT need wet leaves to infect.
Cultivation Guide
Start seeds indoors 6-8 weeks before transplanting
Harden off seedlings for 7-10 days before field planting
Stake or cage indeterminate varieties for better air circulation and fruit quality
Mulch around plants to conserve moisture and reduce soil splash diseases
Prune suckers on indeterminate types for larger fruit and earlier ripening
Rotate with non-solanaceous crops for at least 3 years
Companion Planting
Strategic companion planting reduces pest pressure, improves pollination, and can significantly increase yields.
Climate & Regions
Active climate zones for Tomato are highlighted below.
Tropical
Suitable
Subtropical
Suitable
Temperate
Suitable
Mediterranean
Suitable
Highland
Suitable
Arid / Semi-arid
Not typical
Specific Zones & Regions
Common Questions
Tomato grows best during the warm season — plant after last frost. in tropics, can be grown year-round with irrigation.. It requires optimal 21-27°c daytime, 15-20°c nighttime. fruit set fails above 35°c or below 10°c. and full sun — minimum 6-8 hours direct sunlight daily. In tropical regions with consistent warmth, it can often be grown year-round with proper irrigation.
Tomato is commonly affected by Tomato Early Blight, Tomato Late Blight, Tomato Leaf Curl Virus and 3 others. Regular crop monitoring, good air circulation, avoiding overhead irrigation, and using disease-resistant varieties are the most effective prevention strategies.
Tomato grows best in well-drained, fertile loam with ph 6.0-6.8. rich in organic matter. avoid waterlogged or compacted soils.. For irrigation: regular, consistent watering — 25-50 mm per week. avoid overhead irrigation to reduce foliar disease. drip irrigation ideal.. Maintaining proper soil moisture without waterlogging is critical — Tomato is sensitive to both drought stress and root rot from excess water.
Tomato grows well alongside basil, marigold, carrot, parsley. These companions help repel pests, improve pollination, or provide ground cover. Avoid planting near fennel, brassicas, walnut, which can inhibit growth or share susceptibility to the same pests and diseases.
CuraPlant
Scan any leaf with your phone and get an instant AI diagnosis, treatment guide, and prevention plan — even offline.
