Red tomatoes

Best Planting Times for Tomatoes in California

Planting MethodActivityRecommended Dates
Outdoor PlantingIndoor Seed StartingFebruary 1 – March 1
Transplant OutdoorsApril 1 – April 30
Greenhouse PlantingYear-roundAdjust planting based on temperature control in the greenhouse

Planting Conditions in California

California’s diverse climate ranges from Mediterranean along the coast to arid in the interior, making it suitable for various planting strategies.

Find the Growing Zone for Your California Garden

Sun Requirements

Tomatoes require full sun, with at least 6-8 hours of direct sunlight daily. In most regions of California, this requirement is easily met, especially with the state’s generally clear, sunny weather.

Starting Tomatoes Indoors

In regions like Los Angeles (Zone 10b), start tomato seeds indoors from February 1 to March 1. This gives plants a head start before transitioning them outdoors.

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Useful Tools for Starting Tomatoes Indoors

Using the right tools can save you time and increase your success rate.

Seeds

Quality seeds lead to better germination and healthier plants. Starting with high-quality seeds gives your tomatoes the best chance to thrive from the very beginning.
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Browse Tomato Seeds on Amazon

Planting Trays

Planting trays help you organize your seedlings and ensure they have enough space to grow before you transplant them outdoors. This makes the process more efficient and increases the chances of strong, healthy plants.
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Grow Lights

Grow lights are essential if you don’t have enough natural sunlight. They provide your seedlings with the light they need to grow strong and healthy, even in less-than-ideal conditions.
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Seed Starting Soil

Using light, fine soil specifically designed for seed starting helps young roots establish quickly and promotes healthy growth. It’s an easy way to give your seedlings the best start possible.
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Greenhouse Growing

Greenhouses provide an optimal environment for growing tomatoes by maintaining consistent temperatures, protecting from harsh weather, and extending the growing season. They allow you to control the growing conditions, resulting in healthier plants and higher yields.

Currently, the 8x10x7.5 FT Greenhouse is priced at $999. It’s a great investment for ensuring your tomatoes thrive all year round.
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Check the latest price on Amazon.

Fertilizer

Fertilizer plays an essential role in providing tomato plants with the nutrients they need for robust growth and a plentiful harvest.
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Other planting guides for California:

Any questions on growing tomatoes? Visit our forum to discuss: Growing Tomatoes

Transplanting Tomato Seedlings

Transplant seedlings outdoors from April 1 to April 30, once the risk of frost has passed and soil temperatures are consistently above 50°F. Space the seedlings about 24-36 inches apart in rows that are at least 36 inches apart, ensuring adequate airflow and sunlight penetration.

General Care and Maintenance

Watering:

  • Regular watering is crucial to maintain evenly moist soil, particularly during the dry, hot summers.
  • Deep, infrequent watering encourages a strong root system.

Fertilizing:

  • Fertilize tomatoes at planting and again as fruits begin to form. Use a balanced, slow-release fertilizer tailored for tomatoes.

Pest and Disease Management:

  • Monitor for common pests such as aphids, spider mites, and tomato hornworms.
  • Employ cultural, mechanical, or biological controls to manage pest populations effectively.

Harvesting Tomatoes:

  • Harvest tomatoes when they are firm and fully colored. In California’s warm climate, it’s often possible to let tomatoes ripen on the vine, although harvesting slightly early can help avoid issues with pests and splitting.
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