In Nordic and Northern European climates, herbs generally grow more reliably indoors over the whole year, while outdoor growing works best only during the short summer season.

Outdoors in Northern Europe, herbs grow very well in late spring and summer thanks to long daylight hours. However, the growing season is short, and weather can be unpredictable. Cool temperatures, heavy rain, wind, and early autumn cold often limit how long herbs can grow outside. Pests and sudden weather changes can also damage plants quickly.

Indoors, herbs benefit from a stable environment. Even though indoor light is weaker than summer sunlight, indoor growing protects herbs from cold temperatures and seasonal changes. With the help of grow lights or smart gardens, herbs can receive consistent light year-round, which is especially important during dark autumn and winter months.

In real Nordic conditions, outdoor growing usually gives faster growth in summer, but indoor growing allows continuous harvesting all year. For many people in Northern Europe, indoor herb growing is the most practical way to have fresh herbs consistently, regardless of season.