Butterheads develop a light yellow, buttery appearance. Lettuce seeds speciality commercial vegetable seed. Romaine or cos lettuce lactuca sativa forms elongated heads. Although romaine is the most common name in north america, this variety will occasionally be referred to as cos lettuce. One important key to wholesale production in kentucky will be selecting varieties adapted to our local climate. Germination takes place at a minimum of 5 c, has an.
Lettuce, cos little gem is an ideal plant for filling in gaps. Cos and cutting have a significant content of ascorbic acid, vitamins a. There are many other varieties of cos lettuce, some whiteseeded and others blackseeded. This dark leafy green contains lutein and xeazanthin, carotenoids that help keep eyes healthy. Their flavor is sweeter than the other types of lettuce. Varieties to try include paris island cos and valmaine. Looseleaf, or bunching lettuce does not form heads. Identification and quantification of selected metabolites in differently pigmented leaves of lettuce lactuca sativa l. Heirloom lettuce varieties organic gardening mother. Most of the commercial acreage of lettuce is in the southwestern states, where lettuce, most of it the iceberg type, is grown the year around and. Four botanical varieties of lettuce are cultivated. Butterhead or boston lettuce tends to form smaller, less firm heads, with soft, waxy leaves. How to grow cos lettuce guide to growing cos lettuce. Lettuce varieties learn about the different types of lettuce.
It may be started indoors for an even longer season. Recommended varieties of cos lettuce include cimarron red, cuore, flashy trout back, green. Check out this video to find varieties of lettuce and salad greens that you can grow in containers for an urban. Looseleaf looseleaf lettuce produces an open rosette of leaves loosely arranged on the stalk. One variety, the woju ts, or asparagus lettuce celtuce, is grown for. Slowbolting or heatresistant varieties are available and are recommended for extending the lettucegrowing season. The parris island cos lettuce is a romaine lettuce, which means it is among the most nutritious of lettuce varieties. Lettuce is best planted in succession, or using different varieties that mature at different times. The butterhead varieties are generally small, semiheading types that have tender, soft leaves and a delicate flavor. A pale, round, tightly packed lettuce which has crisp leaves with a refreshing flavour. Crisphead lettuce, more commonly known as iceberg, has a tight head of crisp leaves. Its leaves are bright to dark green, with red tinges in the red romaine varieties.
Three varieties of romaine that do well here are parris island cos, valmaine, and dark green cos. This is the second most commonly grown hydroponic lettuce type behind the butterhead. Growers looking to expand their lettuce offerings beyond commonly produced greenhouse varieties usually have to do their own trials looking for field varieties that can be adapted to a greenhouse environment. Dont look for a head on them because the leaves branch from a single stalk.
Heirloom romaine lettuce seeds paris island cos non. Harvest by removing outer leaves or the entire head. Leaf and bibb lettuces do well in hotbeds or greenhouses during. Nearly all commercially produced leaf lettuce in the. Bibb lettuce becomes bitter under high summer temperatures. At maturity typically 7075 days, the leaves can reach heights of 10 or so, with a dark outer coloring and white heart lower down the head. Cos romaine lettuces form open, upright heads of deeply colored leaves. These test guidelines apply to all varieties of lactuca sativa l. Lobjoits green cos is considered by many to be the best lettuce that you can grow or eat. Lettuce color for commercial cultivars varies from a yellowgreen to dark red and all colors in between. Romaine or cos lettuce is upright in form and grows 8 or 9 inches tall. Jose agriculturist ii bpinational crop research and. The tightly folded leaves are greenish white in the center and medium green on the outside.
These form a tall, elongated head and have a leaf shaped somewhat like the bowl of a spoon. Leaf guide the british leafy salad association web site. Lettuce grows best in temperatures of 45 to 80 degrees. Smaller and more compact than most other romaines, this excellent variety forms elongated 20cm 8in heads with self folding leaves. Varieties suitable for processed romaine may not be suitable. Leafy greens, sometimes used to complement a lettuce selection, include bok choy, spinach and swiss chard.
Vitamin c content of different types of lettuce varieties. Romaine or cos is less commonly grown by gardeners, but a very nutritious lettuce that deserves attention. Head weight and yield of several romaine and leafy lettuce varieties grown at the uh. Cos or romaine forms an upright, elongated head and is an excellent addition to salads and sandwiches. Other types 810 apart in rows 1218 apart for fullsize heads or 6 apart for mini heads. The category of leaf lettuce includes many subcategories, such as oakleaf, lollo, multileaf, summer crisp. Leafy green vegetables lettuce butterhead crisphead cos. Lettuce loose leaf growing guide crop rotation group.
Cos refers to a greek island located off the southwestern coast of turkey, where this lettuce variety is said to have. It grows in cool weather, but some varieties are heat tolerant. The leaves are crisp, tender, and sweet with the lighter, inner leaves being the crispiest. What is parris island cos how to grow parris island cos. There are five distinct types of lettuce leaf also known as looseleaf, cos or romaine, crisphead, butterhead and stem also called asparagus lettuce or celtuce. And there are so many more types of lettuce to explore. Romaine varieties of lettuce can be kept in a refrigerator for up to a. Romaine lettuces are firmer than looseleaf lettuces, with a crispy, yet tender, center rib. Much of the commercial lettuce breeding is focused on outdoor field production. Lettuce lactuca sativa is an annual plant of the daisy family, asteraceae.
Romaine lettuce is known by many names, including cos lettuce, roman lettuce and manchester lettuce. Lettuce is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps. Semishade, a cool sunny spot or interplanted between other crops. An overview of lettuce production systems and cultivars used in hydroponics and protected culture in florida 4 looseleaf, leaf, or cutting.
Lettuce is hardy and can be planted as early as the soil can be worked. British iceberg lettuce is available from may through to october and reaches the stores less than 24 hours after picking. Lettuce, annual leaf vegetable of the aster family. In the winter, more temperate varieties can achieve better results. Cos cos lettuce, also known as romaine lettuce, has long narrow foliage with an upright growth habit and loose elongated heads. As with batavia lettuce, there are several varieties of oak leaf lettucegreen, red, bronzebut they are all looseleaf lettuces, meaning the leaves stay loose and attached only at the base as they grow instead of forming tight, compact heads like iceberg lettuce or cabbage. Lettuce, a coolseason vegetable crop, is one of the easiest to grow. Outer leaves are dark green, less crispy, and slightly less flavorful. Thurinus pelleted lettuce seed johnnys selected seeds. Often found in the local salad bar and a virtual staple in the delicious blt, its actually one of the more difficult lettuce varieties to grow.
Some types and varieties of lettuce withstand heat better than others. Romaine is a coolseason crop that is planted in early spring or late summerfall. Leaf lettuce is best adapted to arkansas conditions and produces crisp leaves loosely arranged on the stalk. Below are product guides for each of starke ayres lettuce seeds speciality varieties. Careful variety selection is important for hot weather plantings. Smallheaded varieties are good choices for succession plantings. It can be planted between widely spaced crops such as courgettes and can be harvested before the courgette needs that space. They should be planted in rows set about 36 inches 91 cm. Lettuce, parris island cos burpee seeds and plants. Pdf in this study, we report on the relationship between individual antioxidant carotenoids, phenolic fractions, and flavonoids and attenuating nacl.
Flavorful palecreamy green heart is surrounded by thick green outer leaves on enormous upright plants. Lettuce is generally a rich source of vitamins k and a, though the nutritional quality varies, depending on the variety. If you have any spare space anywhere in your tunnel or. Department of agriculture reissued farmers bulletin 1609, lettuce growing, and listed the leading varieties of lettuce then under cultivation. Youll often see it in baby lettuce, mesclun, and spring mixes because of its tenderness. Most lettuce varieties are eaten fresh and are commonly served as the base of green salads. For this reason, leaf lettuce is generally more perishable than head varieties. Evaluating fieldbred lettuce varieties for hydroponic. There are five distinct types of lettuce leaf also known as looseleaf, cos or romaine, crisphead. Of course lettuces are the basics for innumerable salads. Cos is so called as it is thought it originated on the greek island of the same name kos. Dating back to 1952, this heirloom lettuce is named after the actual parris island off the coast of south carolina. Romaine may be started directly in the garden by using seeds or transplants. Romaine lettuces have an upright growth habit that makes them more resistant to frost damage than lettuces with a more horizontal leaf growth pattern.
It is most often grown as a leaf vegetable, but sometimes for its stem and seeds. Diseases of lettuce giiy weston bohn american gardeners grow several types of lettucethe loose leaf varieties, cos or romaine, butterhead, and iceberg. The five varieties of lettuce that can be grown in the garden include the following. Cos lettuce little gem is one of the earliest varieties to mature, producing small compact plants which are packed with a crisp, sweet heart. There is a considerable amount of variation in leaf color within. Growing parris island cos is no different than growing any lettuce plant. Romaine lettuce variety trials, 2009 fresh heart 4140rz. These nongmo seeds grow upright into tall heads of lettuce that are ready to harvest in 65 to 70 days. We also like bibb lettuce sauteed with the earliest peas in spring, with a dash of mint. There are opportunities for romaine lettuce sales at all direct farm. Stem lettuce forms an elongated seedstalk used mainly in stewed, creamed and chinese dishes.
Also called cos lettuce, it has been cultivated for more than 5000 years. Most soil types but best if its moisture retentive with some dug in compost. An overview of lettuce production systems and cultivars. Recommended varieties of cos lettuce include cimarron red, cuore, flashy trout back, green towers, parris island cos, red eye, tall guzman elite and musena. Transplant iceberg and romaine lettuce 1012 apart, in rows 18 apart. Growers in an area where both climate zones can occur are advised to conduct trials to identify the most preferable varieties. It can grow in hotter weather for short intervals, but as temperatures remain above 80 degrees, the lettuce will start to bolt into seeding.
The large and narrow leaves grow upright to around 89 inches and form a loafshaped head. Fordhook and dark green boston mature in 80 days and are known for their excellent flavor. The experimental greenhouse for hydroponic lettuce is located in sgravenzande, in the heart of the westland, the large glasshouse district of the netherlands. Recommended varieties of cos lettuce include cimarron red, cuore. Under application for inclusion in the ec common catalogue of. Thirty heads of iceberg lettuce harvested at once can present a major storage problem. Comprehensive brochures can also be viewed or downloaded in pdf format using the links next to each variety, where available. Crunchy lettuce crunchy lettuce represents a very interesting alternative to cos or iceberg. Lettuce varieties, types of lettuce, varieties of lettuce. Any classification such as this is open to interpretation although the varieties listed below are generally held to belong to the cos type. Parris island cos romaine lettuce seeds can be planted close together for a long harvest of baby leaves for gourmet salads. Description of morphological characters of lettuce lactuca sativa l.
Varieties specifically developed for greenhouse hydroponics disease resistance high degree of coloration varieties can be selected for cool and low light winter conditions or warmer season cropping. The leaves have stronger flavor than looseleaf varieties, and crunchy midribs. This rhs award of garden merit cultivar grows well under cloches and also has excellent root aphid resistance more info. Cos, or romaine lettuce forms a more upright, loose head. Floricos 83 is a line recently released by florida ifas. Romaine has crisp, sturdy leaves that are used in caesar salads. Most of the romaine currently sold to wholesale salad companies consists of varieties that have been bred for western and southwestern u. Parris island, or cos lettuce, is a popular variety of romaine lettuce, and is recommended for its crispy, flavorful leaves. Seeds can be sown directly in the garden and will mature in about 6570 days. Pdf verte and romaine lettuce varieties lactuca sativa show. The parris island cos is resistant to mosaic virus, and the leaves have a mildly sweet flavor.812 39 1180 556 1124 792 308 50 973 344 454 332 874 74 275 420 421 1461 1386 1049 1066 704 1423 154 863 222 285 1481 851 500 778