Lettuce can be a colorful ornamental foliage
plant.
Lettuce is a great addition
to spring containers.

Lettuce Shows

Lettuce is a great garden vegetable, but it doesn’t have to be relegated to rows in the vegetable plot. This versatile plant can add color and texture in ornamental plantings. It looks handsome mixed with annuals in a flower bed, combines well with spring-flowering bulbs, or is a great foliar foil in mixed containers.

There are innumerable varieties of lettuce in a huge range of colors, leaf shapes and sizes for almost any look. Not all lettuce is the pale green of typical grocery store iceberg lettuce. These days you can find all shades of green from pale to very dark. There are also burgundy or red leaved types, and numerous types mottled or variegated in shades of green and red. Leaf shape varies a lot, too, with choices of smooth edged or deeply indented, such as oak leaf types, and flat or frilly.

There are four main types of lettuce:

Iceberg lettuce is a crisphead type.Crisphead lettuce (the iceberg found in grocery stores) forms a tight head under the appropriate conditions and very crisp leaves. Batavia or Batavian is a crisphead developed in France that is curlier and less crunchy.
Butterhead lettuce has soft leaves.Butterhead or bibb lettuces produce loose, gently folded heads with delicate leaves.
Romaine or cos lettuce.Romaine or cos (after the Greek island of Kos in the Aegean Sea) types form a long, loose head with broad, upright leaves.
Leaf lettuce comes in many colors.Leaf types do not form a head, but stay as an open rosette. The leaves may be rounded or elongated, lobed or with straight margins, and flat or curled. Individual leaves can be cut off as needed without harvesting the entire plant. These vary in texture from soft to crisp and run the gamut from pale green to dark red. They are sometimes called "cutting", "bunching," or "curled" lettuce.

Looseleaf types tend to be most attractive as ornamentals, but the stiff upright leaves of romaine types or the loose heads of butterhead can offer good contrast to certain plants. Choose from apple green varieties, burgundy tinged or red-leaved cultivars to add a splash of different colors in the ornamental bed.

A few years ago the Royal Horticultural Society evaluated lettuce varieties in England for their ornamental value, as well as freedom from pest and disease. Twenty-six varieties were given Awards of Garden Merit, but few are commercially available in North America. Click here for the complete report. PDF file

There are hundreds of lettuce varieties.

There are hundreds of lettuce varieties available. Some of the more ornamental ones you may wish to try include:  

The various colors of lettuce leaves are very decorative.

Lettuces with frilly, ornately shaped or beautifully colored leaves can be grown strictly as ornamentals, with no intension of harvesting them to eat, in flower gardens. Use them on the border as an edging or place them in among other plants. When mixing lettuce in with other ornamental plants, use the same principles of design as you would with other foliage plants – select plants to contrast in color and texture with the adjacent plants regardless whether they are other lettuce varieties or herbaceous ornamentals.

'Lolla Rossa' lettuce plants
used as edging.

Even when the lettuce begins to go to flower, forming leafy “towers”, the plants still look interesting (though they likely will be bitterly inedible by then). Cutting off the flower spikes as they begin to show will temporarily stop elongation, but the plants will do everything they can to flower despite your best efforts. You can continue to cut the inflorescences back or, if it’s late enough in the season, you could replace the flowering lettuce with new, small plants to last through the fall.

Interplanting lettuce you intend to eat with annuals or perennials in flower beds, or among other vegetables in the vegetable garden, can utilize limited space in the small garden. Looseleaf types are the easiest to use decoratively, since you can snip a few leaves here and there without the huge gap that harvesting the whole head of a romaine or crisphead will leave. Alternatively, lettuce plants can be placed so they can be harvested as nearby plants begin to grow and spread, and the other plants will then fill in the gaps left after harvest. Start lettuce seedlings indoors, harden them off, and then tuck them into open spots between other plants. This procedure can also be done in early fall in the vegetable garden as other crops are harvested – or even in the perennial garden among early spring bloomers that begin to die back in summer.

A decorative English vegetable plot.

Just because a vegetable garden is utilitarian, doesn’t mean it has to look like it, with everything planted in soldier-straight rows. Pleasing designs and interesting plant combinations can be used to make the overall appearance of the vegetable garden more ornamental (at least until the plants are harvested!). You might try making a lettuce “quilt” of several different varieties. Interplant frilly red lettuce and onions, with their spiky green leaves, in specific or irregular patterns (be sure to cut the lettuce off at the ground when harvesting rather than pulling the plants which could damage the onions’ roots). Use a row of lettuce as an edging around flowers in the cutting garden.

Lettuce is also a wonderful addition to seasonal containers. The attractive foliage complements many types of flowers, including bulbs, in spring. The bold structure adds impact when combined with pansies in spring or fall, and red-leaved varieties can be a strong contrast to the mainly green leaves of cool-season flowers. And the lettuce will be ready to harvest, if you choose, as warmer weather comes on and plants in the containers are ready to be replaced with summer plantings.

Lettuce and kale combine with pansies. Small, bright green lettuce leaves are a
fresh, spring-like contrast to the white
and red Bellis flowers.
Red looseleaf lettuce and
pink tulips combine in an
early spring container.
Red leaf lettuce and pansies in a container
surrounded by tulips.
Red looseleaf lettuce provides
a color contrast with green-
leaved plants.

Lettuce is a cool-weather crop that does best in spring and fall, but there are cultivars that are more heat tolerant – often labeled as “summer lettuce.” Most cultivars do best in full sun, but many do well in light shade during the summer.

It’s fun and easy to create quite an interesting display with exclusively or mainly edible plants, featuring lettuce and other vegetable plants that can be quite ornamental, such as Swiss chard, kale, cabbage, basil, and some varieties of peppers.

Susan Mahr, University of Wisconsin - Madison

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