🌿 Tomato – Outdoor Growing Guide

Only outside after ice saints – botrytis risk in persistent rain.

Frost Sensitivity
Very High
Min. Night Temperature
10°C
Safe transplanting threshold
Optimal Day Temperature
18–30°C
Ideal daytime range
Planting Season
Late Spring
Typical planting window

📅 When to Plant Tomato?

Tomato (also known as Tomate) belongs to the Vegetables category and is suitable for outdoor planting from Late Spring onwards.

Use the Growing Temperature Sum (GTS) as a guide: Tomato can be safely transplanted once the local GTS has passed the threshold for Late Spring and no frost is expected. GrowPilot.guide calculates the current GTS for your location automatically.

🗓️ Tip: Always check the 10-day weather forecast before planting outdoors. The GTS is a helpful guide but does not replace a frost check for your specific area.

❄️ Frost Sensitivity & Protection

Tomato cannot tolerate any frost whatsoever. Even light ground frost (−1°C) can cause complete plant loss. Only transplant outdoors when night temperatures are consistently above 10°C and no frost is forecast for the next two weeks.

What to do in case of late frost?

❄️ Late frost risk: In many temperate climates, late spring frosts can occur well into May. Always check the 10-day forecast before planting Tomato outdoors.

🌡️ Optimal Temperatures

Tomato grows best at daytime temperatures between 18°C and 30°C. Night temperatures should not fall below 10°C.

🍄 Mold & Rain Tolerance

Tomato is sensitive to mold and high humidity. Ensure good air circulation during prolonged wet or humid weather. Space plants well and allow leaves to dry after rain.

Rain sensitivity: High – Prolonged rain can cause damage – protection with a film cover or roof overhang is recommended.

📱 Plan with GrowPilot.guide

GrowPilot.guide calculates the current Growing Temperature Sum (GTS) for your location, shows the phenological season and gives you a daily personalised analysis – including frost warnings, mold risk and optimal planting time for Tomato.

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🌱 Plan Tomato with GrowPilot.guide

Get a daily personalised weather analysis for Tomato – with GTS, frost warnings and planting recommendations for your location worldwide.

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📚 Grow Guides for Tomato

Expert growing knowledge to help you cultivate Tomato successfully:

✂️ Training Targeted defoliation for optimum light incidence Learn how to optimize light incidence in the vegetative phase through targeted defoliation and thus increase y…