What is the fastest lettuce to grow?

Loose-leaf varieties are the fastest, ready for full heads in about 30 to 45 days and for baby leaves in as little as 21 days. Because leaf lettuce does not need to form a tight head, you can begin picking outer leaves as soon as they are big enough and let the plant keep producing. Cut-and-come-again harvesting of leaf lettuce gives the earliest and longest supply from a single sowing, which is why it is the go-to for a quick, continuous salad crop.

Does lettuce keep growing after you cut it?

Leaf and romaine lettuce do regrow after a light harvest, which is the basis of cut-and-come-again. Cut the outer leaves or take the whole plant an inch above the crown, and it will push new growth for another picking or two before it tires or bolts. Crisphead lettuce, harvested as a single tight head, does not regrow. For the longest continuous supply, grow leaf lettuce, harvest outer leaves regularly, and sow small batches every couple of weeks in succession.

How Long Does Lettuce Take From Seed to Harvest?

Q: How long does lettuce take from seed to harvest?

Lettuce takes about 30 to 60 days from seed to harvest depending on the type. Loose-leaf lettuce is fastest at 30 to 45 days, romaine takes 45 to 60, and crisphead (iceberg) is slowest at 60 to 80 days. You can pick baby leaves even sooner, often in as little as 21 to 30 days, by harvesting the outer leaves young. Cool weather of 60 to 70°F gives the best growth; heat speeds bolting and turns lettuce bitter, which effectively shortens the usable window.

Q: Can you harvest lettuce early as baby greens?

Yes, and it is one of the best ways to get lettuce fast. Baby lettuce leaves are ready roughly 21 to 35 days after sowing, well before a full head forms. Sow leaf lettuce thickly, then harvest the outer leaves once they reach 3 to 4 inches, cutting about an inch above the crown so the plant regrows. This cut-and-come-again method yields several pickings from one planting and keeps the leaves at their tender, mildest stage before summer heat brings bitterness.

Q: Why is my lettuce taking so long to grow?

Usually cold soil, low light, or crowding. Lettuce germinates and grows best in cool but not cold conditions; below about 40°F growth nearly stops, so an early-spring sowing can sit for weeks. Too little light stretches and slows plants, and seedlings packed too close compete and stall. Steady moisture matters too, since stressed lettuce grows slowly and bolts. Give it 60 to 70°F weather, full sun in spring and fall, thinned spacing, and consistent water for the fastest growth.

Written & researched by Elena Marsh Gardening & Landscaping Editor

Updated October 2026

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Lettuce takes about 30 to 60 days from seed to harvest, depending on the type. Loose-leaf is fastest at 30 to 45 days, romaine takes 45 to 60, and crisphead (iceberg) is slowest at 60 to 80. You can pick baby leaves sooner still — often in as little as 21 to 30 days — by harvesting outer leaves young. Cool weather of 60 to 70°F gives the best growth, while heat speeds bolting and turns lettuce bitter, effectively shortening the usable window. Choosing the right type is the biggest lever on how soon you eat.

How long by lettuce type?

The type sets the timeline because it determines whether the plant has to form a head. Leaf lettuce can be picked as it grows; crisphead has to mature a dense head first, which is why it takes twice as long.

Lettuce type	Days to full harvest	Baby-leaf harvest
Loose-leaf	30–45 days	~21–30 days
Butterhead (Bibb)	45–55 days	~30 days
Romaine	45–60 days	~30–40 days
Crisphead (iceberg)	60–80 days	Not suited

Overhead view of a person harvesting ripe tomatoes into a basket in a backyard vegetable garden, in soft early-morning light

Can you harvest earlier as baby greens?

Yes — this is the fastest route to eating. Baby lettuce is ready roughly 21 to 35 days after sowing, well before a full head forms. Sow leaf lettuce thickly, then harvest the outer leaves once they reach 3 to 4 inches, cutting about an inch above the crown so the plant regrows. This cut-and-come-again method yields several pickings from one sowing and keeps leaves at their tender, mildest stage before summer heat brings bitterness. Leaf and romaine regrow after a light cut; crisphead, harvested as one tight head, does not.

Over-the-shoulder view of a person harvesting ripe tomatoes into a basket in a backyard vegetable garden, in bright midday sun

Why is my lettuce taking so long?

Slow lettuce usually comes down to cold soil, low light, or crowding. Lettuce grows best in cool but not cold conditions — below about 40°F growth nearly stops, so an early-spring sowing can sit for weeks doing little. Too little light stretches and slows plants, and seedlings packed too close compete and stall. Steady moisture matters as well, since stressed lettuce grows slowly and bolts early. Give it 60 to 70°F weather, full sun in spring and fall, thinned spacing, and consistent water — covered in how often to water a vegetable garden — for the quickest growth.

Golden-hour view of a person harvesting ripe tomatoes into a basket in a backyard vegetable garden

Getting a continuous supply

Because a single sowing all matures around the same time, the way to eat lettuce for months rather than one glut is succession sowing — planting a small batch every one to two weeks so a new crop is always coming. That, combined with cut-and-come-again picking of leaf lettuce, is the reliable method for a steady salad supply from spring through fall, pausing only in the heat of summer. The full rhythm is laid out in our succession planting schedule, and lettuce grows especially well in the controlled soil of a raised bed.

We do not buy, test or physically handle any product on this site. Timing reflects university extension days-to-maturity data and horticultural consensus — see how we rank.