Walk past the lettuce in a supermarket and you might think there are only two or three kinds. Grow it yourself and the picture changes completely. The genus and species behind nearly everything we call lettuce is a single plant, Lactuca sativa, but centuries of selection have split it into a handful of distinct types that behave very differently in the garden. Knowing the types of lettuce — how each one tastes, how it holds up in heat, and how fast it matures — is the difference between a salad bed that quits in May and one that feeds you for months.
This guide breaks lettuce into its six main groups: crisphead (iceberg), romaine (cos), butterhead (Boston and bibb), looseleaf, batavian (summer crisp), and stem lettuce (celtuce). For each you get the flavor and texture, the best culinary use, how it handles warm weather and bolting, roughly how long it takes to mature, and a few reliable named varieties to look for on a seed rack. Use it to match the right lettuce to your season, your space, and the way you actually eat.
All lettuce is one species, split into six garden groups
Every lettuce on this page is a cultivar of Lactuca sativa. Plant breeders and seed catalogs sort those cultivars into groups based on how the plant grows — whether it forms a tight head, an upright column, a loose rosette, or a fat edible stalk. The six groups gardeners actually plant are crisphead, romaine, butterhead, looseleaf, batavian, and stem lettuce. (Botanists sometimes add a “Latin” group, a romaine-butterhead intermediate, and a rarely grown oilseed type, but those almost never reach a home seed packet.)
The practical reason to learn the groups rather than memorize a hundred variety names is simple: members of a group share a flavor profile, a texture, a maturity window, and — most importantly for choosing what to grow — a tolerance for heat. Once you know that looseleaf and batavian types shrug off warm weather while crisphead sulks in it, picking the right seed for July versus October becomes obvious.
A quick orientation before the details, roughly from most heat-sensitive to most forgiving:
| Type | Texture and flavor | Days to maturity (full head) | Heat / bolt tolerance | Best for |
|---|---|---|---|---|
| Crisphead (iceberg) | Crunchy, very mild, watery | 70–85 | Low — needs cool weather | Crisp wedges, tacos, burgers |
| Romaine (cos) | Crisp ribs, sweet, sturdy | 55–75 | Moderate | Caesar salad, grilling, wraps |
| Butterhead (Boston/bibb) | Soft, buttery, sweet | 50–65 | Moderate | Lettuce cups, delicate salads |
| Looseleaf | Tender, ruffled, mild | 30–50 | High | Cut-and-come-again salad mix |
| Batavian (summer crisp) | Thick, juicy, sweet-crunchy | 50–60 | Very high | Summer salads, slaws |
| Stem lettuce (celtuce) | Crisp nutty stalk; mild leaves | 80–90 | Moderate–high | Stir-fries, peeled raw sticks |
Two of these groups — butterhead and crisphead/iceberg — are covered in depth in their own guides, so the sections below keep them brief and focus on placing them alongside the others.
Crisphead lettuce is the crunchy, cool-season head most of us know as iceberg
Crisphead is the group that includes iceberg, the pale, tightly wrapped ball of grocery-store fame. The leaves are crunchy and very high in water, with a flavor that is clean and mild to the point of being almost neutral — which is exactly why it works for shredded tacos, burger layers, and crisp wedge salads where you want crunch and a cool, watery bite rather than a strong green flavor.
Crisphead is also the fussiest lettuce to grow at home. It needs the longest cool season of any type to wrap a solid head, typically 70 to 85 days, and it bolts and turns bitter the moment summer heat arrives. The reliable approach is to start seeds indoors in late winter, transplant as soon as the soil warms, and aim to harvest before steady daytime temperatures climb past the low 70s Fahrenheit. A second sowing in late summer gives an autumn crop. Because of that narrow window, many gardeners skip true iceberg in favor of batavian “summer crisp” types, which deliver similar crunch with far better heat tolerance.
Dependable varieties include ‘Great Lakes’, ‘Ithaca’, and ‘Summertime’, with ‘Crispino’ and ‘Nevada’ offering better bolt resistance if your spring is short.
Romaine grows upright with sweet, sturdy ribs built for Caesar salad
Romaine — also sold as cos — forms a tall, upright column of long leaves with a crisp central rib and a sweeter, fuller flavor than crisphead. That sturdiness is the whole point: romaine holds its texture under dressing, stands up to a few minutes on a hot grill, and makes the leaf you actually want in a Caesar. The leaves can be picked young and loose or left to firm into a dense heart.
Romaine is more heat-tolerant than crisphead and matures faster, generally in 55 to 75 days, though it can still bolt or develop tip burn in a hot, dry spell. Because it grows up rather than out, it fits neatly along the edge of a narrow bed and lets you tuck other crops alongside. You can harvest the whole head with a cut at the base, or peel outer leaves over time and let the center keep building.
Look for ‘Parris Island Cos’ as the standard, ‘Coastal Star’ and ‘Jericho’ for genuine heat tolerance, ‘Green Towers’ and ‘Winter Density’ for cool-season sturdiness, and the compact ‘Little Gem’ for small spaces or single-serving heads. Speckled novelties like ‘Flashy Trout Back’ and deep-red ‘Outredgeous’ are romaines too, and both take well to cut-and-come-again harvesting.
Butterhead lettuce forms loose, silky heads of buttery sweet leaves
Butterhead — the group that includes Boston and bibb types — produces a loose, soft head of thick, tender leaves with a delicate, almost buttery sweetness and very little crunch. Those supple, cupped leaves are the natural choice for lettuce wraps and cups, and they make a luxurious base for a simple salad where the leaf itself, not the dressing, is the point.
Butterheads are fast and forgiving, usually maturing in 50 to 65 days, and they are moderately heat-tolerant — they hold their sweetness and resist bolting longer than crisphead, though not as long as looseleaf or batavian. Their compact size makes them one of the best types of lettuce for containers and small raised beds, where consistent moisture and light feeding produce the silkiest leaves. (For variety-by-variety detail, see the dedicated butter lettuce guide.)
Reliable picks include ‘Buttercrunch’, ‘Bibb’, and Boston-type ‘Nancy’ and ‘Mirlo’ in green, with ‘Skyphos’, ‘Red Cross’, and ‘Pirat’ adding red-tinged color and good warm-weather staying power. The pint-sized ‘Tom Thumb’ forms three- to four-inch heads that are perfect for a single salad.
Looseleaf lettuce skips the head and gives you fast, easy cut-and-come-again greens
Looseleaf is the group that never bothers to form a head — it grows as an open rosette of tender, ruffled green or red leaves that you harvest a few at a time. This is the easiest and fastest lettuce there is, and the right answer to two of the most common questions new growers ask: which lettuce is easiest to grow, and which is fastest. Baby leaves are ready to pick in as little as 30 days, with fuller plants a couple of weeks behind, and you can keep cutting the outer leaves while the center regenerates — the cut-and-come-again habit that lets a single sowing feed you for weeks.
Looseleaf is also the most heat-tolerant and slowest to bolt of the heading-and-leaf types, and the most forgiving of imperfect soil and inconsistent watering. That combination makes it ideal for containers, window boxes, succession sowing every two weeks, and tucking between slower crops like tomatoes, peppers, and cabbage. The flavor is mild and the texture tender, so it forms the backbone of most homegrown salad mixes.
Standout varieties include ‘Black Seeded Simpson’, the classic confidence-builder for beginners, frilly red ‘Red Sails’ and ‘New Red Fire’ for color and heat tolerance, and the oak-leaf-shaped ‘Salad Bowl’ (green and red ‘Royal Oak’/’Red Salad Bowl’) with its deeply lobed leaves. Frilly ‘Lollo Rossa’ and ‘Lollo Bionda’ belong here too, prized as much for the loft and color they add to a salad as for their slightly nutty taste.
Batavian summer crisp is the heat-proof workhorse that bridges leaf and head
Batavian lettuce — sold as summer crisp or French crisp — is the group most worth knowing if you garden where summers get hot. It starts out looking like a looseleaf rosette, then slowly fills into a loose, rounded head, combining the open, pick-as-you-go habit of leaf lettuce with thick, juicy, crunchy leaves reminiscent of crisphead. The flavor stays mild and sweet, and — crucially — these types resist turning bitter even in peak summer heat.
That heat and bolt tolerance is the headline. Batavian is the type to plant when you want to keep harvesting through warm weather that would have other lettuces flowering and going bitter, and it is both more forgiving and more productive than trying to push iceberg into summer. It matures in roughly 50 to 60 days, can be cut as baby leaves or grown to a full head, and the thick leaves hold up unusually well after harvest without bruising.
Proven varieties include ‘Nevada’ and the AAS-winning ‘Muir’ (one of the most bolt-resistant lettuces available), bronze-burgundy ‘Magenta’, sweet red ‘Cherokee’, and the green-and-red blushed ‘Chrystal’. If you have failed at summer lettuce before, this is the group to try next.
Stem lettuce, or celtuce, is grown for a crisp, nutty edible stalk
Stem lettuce — known as celtuce, asparagus lettuce, or Chinese lettuce — is the outlier of the group, grown not for a head of leaves but for a thick, swollen central stalk. Long popular in Chinese cooking, the stem is peeled like a vegetable and eaten raw in crisp sticks or cooked in stir-fries, where it offers a moist, snappy texture and a mild, faintly nutty, sometimes almost smoky flavor. The young leaves are edible too and can be used like any leaf lettuce before the plant puts its energy into the stalk.
Celtuce grows much like romaine and prefers similar conditions, doing best sown in early spring so the stem develops before intense summer heat. It needs a longer season than leaf types — roughly 80 to 90 days to a harvestable stalk — and is reasonably heat-tolerant along the way, but a sudden hot spell can make it bolt and turn the stem woody, so steady moisture and a cool finish help. Look for named selections such as ‘Summer 38’ and the Chinese ‘Qingsun’/’Green’ types; seed is most often sold simply as celtuce or stem lettuce.
Reading a seed packet: disease codes and the cut-and-come-again habit
Two pieces of seed-packet shorthand make choosing easier across every type. The first is the string of letters printed after a variety name — disease resistance codes from the International Seed Federation. The most common on lettuce are DM (downy mildew, the disease most likely to spot and rot leaves in cool, damp weather), LMV (lettuce mosaic virus), Nr and Pb (leaf and root aphids), Rs (corky root), and TBSV (a virus tied to the lettuce dieback complex). In a wet climate, a variety carrying DM resistance is worth choosing over one without it.
The second is harvest habit. “One-cut” types — crisphead, butterhead, romaine, and batavian — are typically taken as a whole head with a single cut an inch or two above the soil, after which the stub may regrow a smaller second crop. Looseleaf and most baby-leaf and gem types are the natural cut-and-come-again lettuces: you pick or clip outer leaves repeatedly while the center keeps producing. Romaine and batavian will also tolerate cut-and-come-again picking, which is why they show up so often in salad-mix blends.
How to choose: match the type to your season, space, and plate
Start with your weather, because heat decides more than anything else. For spring and fall, when daytime temperatures sit between roughly 45 and 75 Fahrenheit, every type is in play — this is the only window most gardeners get true crisphead iceberg to head up properly, so use it. For summer, or for hot-climate gardens generally, lean on the heat-tolerant groups: looseleaf, batavian summer crisp, and the toughest romaines and butterheads, ignoring iceberg entirely. If you are wondering whether late summer is too late to sow, it usually is not — northern gardeners can plant in August for a fall harvest, and southern gardeners should reach for heat-tolerant looseleaf and batavian to bridge the last warm weeks.
Then narrow by space and use. Containers, window boxes, and small beds favor compact, fast types — looseleaf, gem-type romaine, and butterhead — which also happen to be the best choices for growing lettuce indoors under a sunny window or grow light. For a constant supply with the least effort, sow looseleaf or a gourmet leaf mix every couple of weeks and harvest cut-and-come-again. For full crunchy heads, choose one-cut crisphead, romaine, or batavian. And let the kitchen have a say: wraps and cups call for butterhead, Caesar and the grill call for romaine, a wedge calls for crisphead, summer salads call for batavian, and a stir-fry calls for celtuce.
The smartest plan most years is to grow several types at once. A bed that mixes a fast looseleaf, a sturdy romaine, a heat-proof batavian, and a butterhead or two spreads the harvest across the season, hedges against a hot spell that bolts one type, and keeps the salad bowl interesting. Keep your favorites, try one new variety each season, and let the season and the plate tell you what to plant next.