Mirror

Family: Asteraceae Leafy Green

Planting Schedule

Provide your location or planting zone to unlock dates and add Mirror to a garden.

Crisp as a fresh snowfall, ‘Mirror’ forms tight, luminous heads that hold their snap with a satisfying, glassy crunch.

The leaves are tender and buttery-smooth, with a clean, refreshing bite that stays crisp even as the weather cools. Ideal for crisphead salads and elegant, chilled platters—grow ‘Mirror’ for a garden-to-table centerpiece that looks as good as it tastes.

Light: Full SunMaturity: 70 DaysHabit: Rosette

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Mirror Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	May 18th	Jun 8th	Aug 17th – Jul 15th
Zone 1b	May 4th	May 25th	Aug 3rd – Aug 1st
Zone 2a	Apr 27th	May 18th	Jul 27th – Aug 29th
Zone 2b	Apr 17th	May 8th	Jul 17th – Aug 25th
Zone 3a	Apr 17th	May 8th	Jul 17th – Sep 1st
Zone 3b	Apr 21st	May 12th	Jul 21st – Sep 21st
Zone 4a	Apr 17th	May 8th	Jul 17th – Sep 24th
Zone 4b	Apr 15th	May 6th	Jul 15th – Sep 27th
Zone 5a	Apr 10th	May 1st	Jul 10th – Sep 30th
Zone 5b	Apr 6th	Apr 27th	Jul 6th – Oct 5th
Zone 6a	Apr 3rd	Apr 24th	Jul 3rd – Oct 10th
Zone 6b	Mar 28th	Apr 18th	Jun 27th – Oct 16th
Zone 7a	Mar 23rd	Apr 13th	Jun 22nd – Oct 20th
Zone 7b	Mar 13th	Apr 3rd	Jun 12th – Oct 28th
Zone 8a	Mar 4th	Mar 25th	Jun 3rd – Nov 5th
Zone 8b	Feb 23rd	Mar 16th	May 25th – Nov 12th
Zone 9a	Feb 6th	Feb 27th	May 8th – Nov 26th
Zone 9b	Jan 12th	Feb 2nd	Apr 13th – Dec 9th
Zone 10a	—	Oct 1st	Dec 10th – Feb 28th
Zone 10b	—	Oct 1st	Dec 10th – Feb 28th
Zone 11a	—	Oct 1st	Dec 10th – Feb 28th
Zone 11b	—	Oct 1st	Dec 10th – Feb 28th
Zone 12a	—	Oct 1st	Dec 10th – Feb 28th
Zone 12b	—	Oct 1st	Dec 10th – Feb 28th
Zone 13a	—	Oct 1st	Dec 10th – Feb 28th
Zone 13b	—	Oct 1st	Dec 10th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Full Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	70
Min Soil Temp (°F)	40
Min Night Temp (°F)	35
Harden Off (days)	5

Culinary Notes

Chef's Note

This crisphead is built for temperature: keep it cold and it stays luminous and glassy, not limp. Its mild, buttery leaf makes dressing cling without getting muddy—so vinaigrettes, salty proteins, and sharp cheeses really pop.

Best Uses

ice-cold crisphead salads with minimal dressing
wedges dressed and finished table-side to keep crunch
chilled platters with vinaigrette and herbs
light wraps where you want a snappy, watery leaf layer

Flavor Profile

cool, clean bite buttery-smooth leaf texture high crunch with glassy snap mild grassy freshness

Kitchen Pairings

lemon vinaigrette bacon blue cheese cucumber grilled chicken sesame oil

Frequently Asked Questions

What disease should I watch for on Lactuca sativa (iceberg-type lettuce), and how can I prevent it?

Watch for downy mildew (often shows as pale yellow patches on leaf tops with gray-purple growth underneath). Avoid wetting leaves, improve airflow by spacing plants, and water at soil level; if you see symptoms, remove affected leaves to slow spread. Use resistant cultivars when possible and don’t plant lettuce in the same bed for at least a season.

How often should I water iceberg lettuce (Lactuca sativa) during its main growth phase?

During the 2–6 weeks of active leaf growth (before heads fully form), keep soil consistently evenly moist—typically about 1 inch (2.5 cm) of water per week, split into 2–3 sessions during warm spells. Don’t let it swing dry-to-soggy; fluctuating moisture can trigger tip burn and bolting. Mulch lightly to reduce evaporation, and check that the top 1–2 inches (2.5–5 cm) of soil stay moist.

How do I tell when Lactuca sativa (iceberg-type) is ready to harvest?

Harvest at about 70 days when heads are firm and feel tight to the touch (not loose like leaf lettuce). Leaves should be crisp and full-sized, with outer leaves starting to hold their shape around the head. If the head begins to elongate or flowers start to form, harvest immediately—quality drops quickly after bolting begins.