Shoulder season
/ˈʃoʊldɚ ˈsiːzən/
Definition
Shoulder season refers to the transition period at the edges of a main growing season, such as early spring before steady warmth or early fall after peak summer growth. In horticulture, it describes weeks when temperature, day length, and light levels are changing enough to affect plant growth, flowering, watering needs, and pest activity, but conditions are not yet fully in the next season.
Practical Relevance
- Timing outdoor transitions: For many gardeners, shoulder season is the safest window to harden off seedlings, move houseplants outdoors, or bring tender plants back inside before weather becomes stressful.
- Shifts in growth rate: Light levels and temperature often change quickly during shoulder season, so many plants use water and nutrients more slowly than in peak summer but more actively than in winter dormancy.
- Pest and disease patterns: Cool nights, mild days, and lingering moisture during shoulder season can favor problems such as fungal leaf spots, while some insect pests remain active longer than expected.
- Best uses in garden planning: Shoulder season is often useful for planting cool-season crops, dividing perennials, and transplanting woody plants, because environmental stress may be lower than during midsummer heat.
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