Full Sun Crops and What Six Hours Means
Why seed packets say full sun, which crops need six or more hours of direct light, and how heat and afternoon sun change the picture.
Published by ThriveThyme
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Full Sun Crops and What Six Hours Means
Full sun means at least six hours of direct sun on the leaves most days in the growing season. It does not mean all-day desert heat, and it does not mean bright shade. University of Minnesota Extension and other beginner guides put six hours as the usual minimum for a productive vegetable garden.
Use Sun Hours to see which catalog crops list six or more hours.
Crops That Usually Want Full Sun
- Tomatoes, peppers, eggplant
- Cucumbers, summer squash, melons, winter squash
- Beans and peas for heavy pod set
- Sweet corn
- Most fruiting flowers grown for bloom or cut flowers
Some crops list eight hours when they are especially light hungry. Treat that as a preference for the brightest bed you have.
Six Hours Is a Floor, Not a Ceiling
- Eight hours of sun often beats six for tomatoes and peppers in cool or cloudy climates.
- In hot southern summers, afternoon shade can reduce stress even when the crop still gets six morning hours. That is heat management, not a reason to plant tomatoes in deep shade.
- Reflective walls can add light. Dense fences and tall hedges remove it.
If fruit set fails in hot weather on a sunny bed, check the Heat Set Desk for night temperature issues.
Before You Buy Seed
- Measure the bed with how to measure garden sun hours.
- Confirm the crop fits on Sun Hours.
- Skip full-sun fruiting crops for beds stuck under four hours. Grow greens there instead.
Matching light first saves a season of weak vines and empty blossoms.