Some varieties just grow faster, which gives you very rapid harvests in a hydroponic system.Other varieties have good heat resistance, which keep them from bolting under warm grow lights.Lettuce Variety Type Days to Maturity Additional Notes Salad Bowl Loose Leaf 50 days Oak-type leaves.Grand Rapids Loose Leaf 45 to 60 days Batavian-type leaves.Parris Island Romaine/Cos 55 to 75 days Buttercrunch Butterhead/Bibb 60 to 70 days Rouge d’Hiver Romaine/Cos 50 to 60 days Red variety.Hanson Improved Crisphead Iceberg/Crisphead 70 to 80 days Little Gem Romaine/Cos 50 days Dwarf variety.Muir Loose Leaf 50 days Best heat tolerance; Batavian-type leaves.Winter Density Romaine/Cos 55 to 65 days Compact growth.Best Lettuce Varieties for Hydroponics.Red Salad Bowl seeds: Johnny’s Selected Seeds (US), West Coast Seeds (Canada), Simply Seed (UK).Salad Bowl has a relatively open rosette, making it easy to harvest.Normally, Salad Bowl lettuce will take 50 days to reach full size, but in a hydroponic system, you could get your first harvests in less than 40 days.As with all loose leaf varieties, harvest with the cut-and-come-again method to maximize consistent yields from each plant.One of the fastest-growing lettuce varieties available is the Grand Rapids, a light-green, frilly-leafed heirloom lettuce with juicy, mild-flavored, Batavian-type leaves that make the perfect addition to a lettuce mix or even as the base of a salad.This variety was bred in the late 19th century and is still popular to this day because of how quickly it grows and its great flavor.Grand Rapids seeds listed as “TBR” are tipburn-resistant which makes them even better for hydroponic systems.One of the best romaine lettuce varieties in terms of flavor, texture, and yield.A hardy, classic red romaine heirloom from France with a crisp midrib and buttery flavor.Although this is a head lettuce, just like Parris Island Cos, this can be harvested leaf by leaf in a cut-and-come-again way so you can stretch out your harvests over several weeks.Get seeds: MIGardener (US), Victory Seeds (US), True Leaf Market (US).Being a head lettuce, expect to wait longer to harvest, but if growing hydroponically, you can usually get harvests in less than the standard days to maturity, however heads might not be as tight as when they grow more slowly.Similar to Grand Rapids, Muir is a frilly, loose leaf lettuce with good production and excellent tipburn resistance.A classic, award-winning English heirloom, Winter Density is a compact, productive romaine with both heat and frost tolerance, making it great for hydroponics or growing in soil.Winter Density’s leaves have a good, crisp texture and buttery flavor, described and somewhere between a romaine and a butterhead/bibb lettuce. .

How to Choose & Grow the Best Lettuce

The many different categories of lettuces are roughly classified by their leaf shape, configuration, and how much of a head they form.That means they can all be crossed, which results in blending between types, and you will sometimes find varieties don't fit perfectly into only one category."Boston" lettuce is a subtype of butterhead, with varieties that have a lighter green color, softer and smooth textured leaves, and nice big heads.Oakleaf: These varieties form attractive, relatively dense, rosette-like heads of curly, crisp leaves that are characteristically deeply lobed and similar in shape to those of oak trees.Essentially any lettuce variety can be grown as a "baby leaf" by planting the seed at high density and harvesting the leaves very young.Baby leaf varieties primarily include romaine, summer crisp, and oakleaf types.Johnny's also carries several lettuce mixes, comprised of multiple varieties that mature at similar rates.Some growers add herbs, edible flowers, baby brassica greens, baby specialty greens, sprouts or shoots to baby-leaf lettuces to create signature salad mixes; for more information, view our Salad Mix Production Guide.Salanova is the industry standard one-cut type for baby-leaf production, and it excels in a variety of cultural settings, from the field to winter tunnels or as a hydroponic lettuce.It is grown to full-head size, but when cut at the plant base, the individual leaves separate, creating a final product similar to baby leaf lettuce.It is more than 40% higher yielding, has better flavor and texture, and double the shelf life, compared to traditional baby leaf lettuce.Rubygo and Verigo are square-leaf types that produce a high count of uniform, attractively-edged, strong but flexible leaves at maturity.Its deeply incised, uniform baby leaflets combine an appealing iceberg texture with complex flavor. .

5 Tips For Successfully Growing Hydroponic Lettuce At Home

Lettuce is a trendy hydroponic plant because it’s not all that difficult to grow at home.Lettuce hydroponics is a technique that allows growers to achieve high yields.Hydroponic lettuce growing is prevalent for both home and commercial growers.It, therefore, has simple nutrient solutions that don’t need to be changed over the growing season.This efficiency makes hydroponics the ideal way to grow sustainable and healthy lettuce.Transplant the lettuce to the hydroponic system once its roots have developed and it has four to six leaves.However, growers strongly prefer loose head varieties when it comes to growing lettuce hydroponically.Loose lettuce varieties have the advantage that you can pick their leaves individually.The picked leaves re-grow and replace themselves, enabling this variety of lettuce to prolong its harvest life.Butter head lettuce leaves a specific sweetness and mild flavor in the mouth.It has a crispy texture and a more robust taste and is the most common lettuce in general.The most common feature of loose-leaf lettuce is that its leaves are joined at the stem and don’t form heads.High temperatures encourage flowering, which will make the lettuce leaves bitter.Therefore, it is essential to have a medium that will enable the seedlings to sprout and offer the roots physical support as the plant continues to grow.Stone wool and phenolic foam are the most common medium for germinating lettuce seedlings.For commercial large-scale hydroponic lettuce production, the Deep Water Culture and Nutrient Film Techniques are the most common methods.Deep water culture consists of rafts that float on constructed ponds or tanks holding large amounts of nutrient solution.Large volumes ensure that rapid changes in temperature and nutrients are avoided.Plants grow in shallow channels with a constant circulation of nutrients in the root zone.The Kratky method yields excellent results for lettuce growers.Loose-leaf varieties are suitable for lettuce hydroponics since you can pick the leaves individually.Warm temperatures will lead to flowering, which will make the plant bitter.Choose your preferred variety and follow the tips to grow lettuce in your home successfully. .

Evaluating field-bred lettuce varieties for hydroponic greenhouse

University of Arkansas researchers trialed 65 lettuce varieties to determine their potential for production in greenhouse hydroponic systems.There are also field vegetable growers who would like to expand their production to include greenhouse crops.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.University of Arkansas horticulture professor Mike Evans said he is constantly receiving inquiries from growers about what lettuce varieties can be grown in greenhouses.So if a grower wanted to grow lettuce hydroponically in a greenhouse during the winter there is little information available.If a grower wanted to use nutrient film technique or deep flow floating systems in a greenhouse, there’s basically very little information on how lettuce varieties would do in these production systems.Most of the production information is field-based.”.Evans said there is also a need for evaluating lettuce varieties for fall, winter and spring greenhouse production.Lettuce variety evaluations.University of Arkansas researchers selected 65 lettuce varieties for evaluation in greenhouse production systems.Or a variety may do well in the fall and spring, but during the lowest light levels of winter, it has some type of production issue.” University of Arkansas researchers selected 65.lettuce varieties for evaluation in greenhouse.production systems.Evans said the lettuce crops were grown on a 42-day production cycle in both the NFT and deep flow systems.“Sometimes if a variety is a fast grower, the lettuce might exceed the weight that a grower would want,” Evans said.Fresh and dry weights were used as a measure of how fast a variety can grow.That is what growers are selling—biomass.”.Evans said there were similarities in how varieties performed in the two production systems.“We rated the lettuce varieties we trialed for tipburn and powdery mildew.We also measured the incidence of tipburn, which can be a problem on a number of greens.”.The following lettuce varieties did well in the four greenhouse production trials conducted at the University of Arkansas. .

Quick Growing Plants for Hydroponic Systems

All of these crops germinate quickly and can be harvested just a few weeks after planting, though growers who want large plants may decide to wait a little longer.Other Greens Many common greens will grow much faster in a hydroponic system than they will when grown in soil.Arugula, a slightly peppery salad green, is ready to harvest as little as three weeks after planting. .

Grow Hydroponic Lettuce Indoors

Bibb lettuce grows very rapidly as do the leaf lettuce varieties.Here are some varieties that perform very well in hydroponics and with indoor artificial lighting:.Royal Oak Leaf is a heat tolerant darker green type of lettuce that does well in hydroponic growing systems.Before planting you'll need to soak the rockwool plugs in a conditioning solution with a pH of about 5.5.You have a few different options when it comes to your growing medium, including neutral pH media such as perlite, vermiculite, hydroton, gravel, sand, cocofiber, etc.These clay balls offer the perfect air to water retention ratio for optimal plant root growth.Growstones are another type of growing medium.They hold 3 times more water and 12% more air than Hydroton type mediums and work well as a growing media for vegetables and herbs.Regularly check your nutrient solutions pH as well as total salt concentration level.T5 fluorescent grow lights are less expensive and also a good light source for lettuce.Tip: Pick the outer leaves as your lettuce grows and you'll end up with an extended harvest of crisp, fresh lettuce. .

How to Grow Hydroponic Lettuce (with Pictures)

Hydroponic gardens should be well ventilated to help your plants get the CO2 they need and prevent the growth of molds and bacteria.Leave a door or window open near the plants, or consider installing a vent with an exhaust fan if you are growing your lettuce in an enclosed space. .

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