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Little Gem forms compact heads with a crisp, sweet heart. Discover how to sow this cos lettuce, provide enough space and harvest in time, with attention to moisture and warmth.
This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
This growing advice helps you choose. Your variety, growth stage, weather and conditions in your space determine the actual timing.
Start under cover in cool conditions or sow directly · Lettuce
February–August, depending on cultivarSow in a bright position that is not hot. A warm loft can be too hot.
Choose a spring, summer or winter cultivar. Celtuce has a different harvest aim from heading lettuce; follow its own cultivar window.
Royal Horticultural Society · RHS — sla kweken ↗Soort- of productgebonden bron; buitenlandse perioden zijn geen vaste Nederlandse zaaidatum.
Utah State University Extension · USU Extension — sla in de tuin ↗Soort- of productgebonden bron; buitenlandse perioden zijn geen vaste Nederlandse zaaidatum.
Guideline periods for the Netherlands and Flanders. Check the variety, available light, soil and measured temperatures. Greenhouse heating does not guarantee enough winter light.
The source context and any limitations are in the background information at the bottom.
Compare with another varietyThe options below belong to the plant. From these, choose the method that suits your variety's growth habit.
This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
A small lettuce row makes care manageable. Choose the right season, keep weeds away and follow leaves. Plan another batch once you see how much you actually use.
For anyone with a small bed or a space available after another harvest.
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This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
Loose-leaf lettuce suits a broad pot. Harvest only what you need and easily see when another sowing is needed. Leave enough room for light and air between rosettes.
For limited space or a smaller, more accessible leaf crop.
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This image was created with AI from described plant characteristics and growing advice. It shows a possible situation and is not a photograph of a verified cultivar.
Use a roomy container with drainage holes and keep the potting compost evenly moist. Give the plants space and gradually pick the outer leaves.
View your supplies →Little Gem is small cos lettuce, also called romaine. RHS describes firm heads with crisp, sweet hearts and mentions containers. This differs from continuous loose-leaf picking. Decide how many heads you need to give a short row a clear purpose.
Lettuce has many small shallow roots. Minnesota advises moisture-retentive soil draining excess water. Prepare a fine surface for small seed and remove large clods. Container drainage matters too: retention does not mean sealed standing water.
Sow modest portions to stagger heads. RHS suggests short rows about two weeks apart for continuous harvest. Adapt repetition to real space. Record dates for each in My garden to follow sowings separately.
Thin crowded rows before competition. Final spacing depends on variety and desired harvest size. Check packaging and allow head room. Small cultivars need less than large icebergs but do not thereby tolerate every density.
Water stress slows head development and can reduce leaf quality. Regularly feel the soil in the root zone. Water when needed, then reassess conditions. Pots and beds respond differently; use the weather forecast as a prompt to check, alongside your own observations.
Prolonged warmth, abundant light and drought can bolt lettuce, shifting leaves to flowers and often greater bitterness. Iowa advises another crop once conditions improve. Little Gem's compactness proves no protection against bolting or all summer conditions.
Assess the head and harvest once sufficiently formed for your use. Cos lettuce need not stand indefinitely. Remove ripe heads while leaf quality is good. Keep cool and avoid unnecessary damage between garden and kitchen.
Record Little Gem's start, position, moisture checks and harvest time, plus flavour and portion preferences. Simultaneous heads in different pots may differ. Keep personal experiences beside variety data to make future choices fit your garden better.
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SeedSteps editorial team · updated on 11 October 2026. The AI images illustrate species and practical growing situations; they do not prove an exact cultivar, observations from your own garden or yield.
Britse gewasadviezen worden gecombineerd met Nederlandse en Vlaamse informatie waar beschikbaar. Amerikaanse Extension-bronnen ondersteunen plantprincipes en herkenning; hun kalenderdata, lokale plaagdruk, bestrijdingsmiddelen en mestdoseringen worden niet rechtstreeks op Nederland of Vlaanderen toegepast. Vorst, bodemwarmte, standplaats en expliciete rasinformatie blijven de lokale controle. Commerciële bronnen onderbouwen uitsluitend benoemde ras- en plantkenmerken; zij zijn geen affiliate-aanbeveling.
Supporting evidence by chapter: Choose a small head suited to your harvest: Royal Horticultural Society. Prepare an even seedbed: University of Minnesota Extension. Sow the next portion beside the first: Royal Horticultural Society. Let plants form their hearts: Royal Horticultural Society. Check soil moisture before lettuce wilts: Utah State University Extension. Recognise the start of a flower stem: Iowa State University Extension. Harvest a useful small portion: Utah State University Extension. Compare heads and their conditions: Royal Horticultural Society, Utah State University Extension.
Variety type: Dwarf cos (romaine); small, firm heads Rasspecifieke RHS-beschrijving in Britse omstandigheden. Groei, smaak en oogstmoment kunnen in jouw tuin afwijken. Royal Horticultural Society
Light: Full sun Rasspecifieke RHS-beschrijving in Britse omstandigheden. Groei, smaak en oogstmoment kunnen in jouw tuin afwijken. Royal Horticultural Society
Main colour: Green leaf Rasspecifieke RHS-beschrijving in Britse omstandigheden. Groei, smaak en oogstmoment kunnen in jouw tuin afwijken. Royal Horticultural Society
Suitable for pots: Yes Rasspecifieke RHS-beschrijving in Britse omstandigheden. Groei, smaak en oogstmoment kunnen in jouw tuin afwijken. Royal Horticultural Society
Soil: Moisture-retentive soil with good drainage Rasspecifieke RHS-beschrijving in Britse omstandigheden. Groei, smaak en oogstmoment kunnen in jouw tuin afwijken. Royal Horticultural Society
Flavour: Sweet heart Rasspecifieke RHS-beschrijving in Britse omstandigheden. Groei, smaak en oogstmoment kunnen in jouw tuin afwijken. Royal Horticultural Society
Texture: Crisp heart Rasspecifieke RHS-beschrijving in Britse omstandigheden. Groei, smaak en oogstmoment kunnen in jouw tuin afwijken. Royal Horticultural Society
