How Much Sun Does Lettuce Need?
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GardenSays
Lettuce needs 4-6+ hours of direct sun — it tolerates partial shade.
- Lettuce needs
- 4-6+ hrs
- Your spot
- 6 hrs/day
- Verdict
- Good fit
Lettuce is a part-shade tolerant crop: its grow guide puts it at 4-6+ hours of direct sun — it tolerates partial shade. The thresholds come from extension guidance — UMD's "at least 6 hours, preferably more" for vegetable gardens, and 4-6 hours for shade-tolerant leafy crops.
Calculated result · 3 verified sources · Checked 2026-07-17 · How we decide
Why
6 hours is comfortably enough for lettuce plants.
- Leaf and root growth needs less light energy than flowering and fruiting, so these crops stay productive in part shade.
When this doesn't apply
- Count only hours of direct, unobstructed sun in the main growing season — morning and afternoon blocks add up. Dappled or reflected light doesn't count toward these thresholds.
- In hot summers, afternoon shade is actually a plus for lettuce — it delays bolting.
How this was calculated
- 1. Full-sun threshold6+ hrs/day
UMD Extension: a vegetable garden needs at least 6 hours of full sun a day, preferably more
- 2. Part-shade threshold4-6 hrs/day
UMD Extension: leafy greens tolerate partial shade at 4-6 hours of direct light a day
- 3. Lettuce classificationpart-shade tolerant
Lettuce is classed as part-shade tolerant by its cited grow guide
- 4. Your spot vs. requirementGood fit
6 hrs available vs. 4+ hrs required
Data sources
- University of Maryland Extension — Planning a Vegetable Garden — A vegetable garden should get at least 6 hours of full sun a day, preferably more. (checked 2026-07-16)
- University of Maryland Extension — Growing Leafy Greens in a Home Garden — Leafy greens tolerate partial shade (4-6 hours of direct light per day). (checked 2026-07-16)
- University of Minnesota Extension — Growing lettuce, endive and radicchio in home gardens — Lettuce is a cool-season crop: direct seed as soon as the soil can be worked in spring, and again in late summer for a fall crop. (checked 2026-07-16)
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People also ask
What vegetables grow in shade?
12 of our 60 crops tolerate partial shade (4-6 hrs of direct light): lettuce, carrot, spinach, peas, kale, beet, cilantro, mint, currant, gooseberry, pansy, hydrangea. Calculate yours →
What counts as full sun?
"Full sun" means at least 6 hours of direct sun a day — and for fruiting vegetables, more is better. Calculate yours →
When should I plant lettuce?
Direct-sow lettuce plants outside Apr 12 – May 3 — they shrug off frost. Calculate yours →
Does afternoon shade help lettuce in summer?
Your next decisions
Vegetables That Grow in Shade
Pick crops that stay productive in a partly shaded garden
When to Plant Lettuce
Cool-season sowing dates for lettuce — often weeks BEFORE your last frost
What Counts as Full Sun?
Decode the full sun / part sun / shade scale on plant tags and apply it to a real spot
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