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Questions tagged [lettuce]

Temperate annual or biennial crop grown for salad leaves.

Lettuce, Lactuca sativa is a member of the Asteraceae 'daisy' family. It is a temperate annual or biennial that is usually grown as a leaf vegetable, e.g. for salads. It is typically eaten raw, although Chinese cuisine often cooks the stem.

Lettuces prefer light, sandy, fertile soils that can hold water in summer. They typically do better in more temperate environments with day time highs below 75F and night time temperatures above 40F.

There are hundreds of cultivars but these are typically grouped into six groups according to leaf shape and color:

  • Butterhead. Buttery texture.
  • Chinese Lettuce. Long sword-shaped leaves. Bitter. Used in stir-fries and stews
  • Crisphead / Iceberg. Tight dense head similar to cabbage. Mild flavor
  • Looseleaf. Tender, delicate, mild.
  • Romaine / Cos. Long head of sturdy leaves with a firm rib.
  • Summer Crisp / Batavia. Moderately dense heads with crunch texture.

Use this tag for all questions about growing lettuces.

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Lettuce - DLI recommendation day 1-14 with full spectrum led

Im looking for a recommendation of the DLI for lettuce in a hydro setup for the first 14 days using a full spectrum led i would figure it at 8 -12 mol/m2/day what do you think? greets
Herrsocke
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Can I use this fertilizer for my Hydroponics?

I'm new to Hydroponics stuffs. I'm striving to plant in hydro form currently. I'm living in under-developed country which is impossible to find the well established nutrients mix such as Master Blend or others similarity. I'm planting lettuce types.…
Sok Vanrithy
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How do I prevent damping-off of my lettuce seedlings?

I have successfully germinated 10 lettuce seeds from a tissue and transplanted them into a pot. They grew more and showed new leaves, but after some time I noticed that their stem from the base started to turn brown and become thinner. I googled it…
SilverRay
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Why do the tips of my lettuce leaves look dark/burnt and feel brittle?

I am growing Batavian 'Arianna' lettuce in a container on my balcony. I'm in San Francisco, so it gets some sun, but it's not all day, and it gets a lot of shade too. I noticed that the tips of some of the leaves appear dark and feel brittle. Is…
Becky
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If you colour water red in a hydroponic system will the leaves on the lettuce turn red/pink

My daughter has to do a science project. She wants to build a hydroponic system and colour the water red to see if the lettuce leaves will turn red. Will it? I don't want to build the whole system just for it not to work.
user41453
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My lettuce leaves keep losing their green color

I transplanted my lettuce to a self-built indoor aeroponics system, about two weeks ago. They seem to be showing slower growth and now & then some of the leaves lose their green color (See the attached image). I am using general purpose hydroponic…
prakhar19
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Should I cover my germinated lettuce seeds?

I tried germinating lettuce outdoors and had a poor germination rate. Then I read somewhere that they may need light to germinate (I had buried them). I grabbed a container with sifted compost I had lying around, watered it and threw some seed…
csamx
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Can I reduce the amount of dirt that collects in corn salad / mâche?

It’s that time of the year again when I enjoy home-grown corn salad (aka mâche, lamb’s lettuce, rapunzel...). While I love the taste, cleaning is a nightmare. Traditionally, the little plant rosettes are served whole and dirt tends to collect in…
Stephie
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Will collards grow from a stub?

I was in my community garden today, and all I found of one of my collards was 3 leaves around the plant, and about a 1 inch stub. Will my collard likely grow back?
black thumb
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Can I grow a new crop of lettuce by saving and planting the whole unopened flower?

It's a lot of work to separate lettuce seeds from the chaff! So I am hoping someone else has already tried saving lettuce seeds by saving and planting the whole unopened flower head. Has anyone tried this, and if so, did it work?
KellyM
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Hydroponic nutrient solution filtration

I am looking to build a small-scale hydroponic farm; lettuce/tomatoes/etc, and am now looking into a filtration system for my re-circulating reservoir. I have previously run into pathogen issues within my system in Florida, so for this up-scaled…
drew
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Fastest Grown Lettuce

I was wondering if there was a "world record" of the fastest fully grown Lettuce and how fast it grew, is there a record for it? or just how fast would it in theory be?
Marius Wanscher
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Red baby lettuce leaves dehydrated in hydroponic system

I planted red baby lettuce in an indoor hydroponic system. There are two types of lightning I used for this plant, A system (a hydroponic system that uses white LED lights) and a B system (an aeroponic system that uses 52 Watt Red and Blue Grow…
Angela Radityatama
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Improving germination with Plasma activated water and lettuce seeds

I've been able to germinate about 90-95% of old seeds (about 15 year old bean seeds) using Plasma Activated water. But I can't get even one lettuce seed to germinate (same age 15 year old packet). I've tried adding honey to the water, adding…
Rick T
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Which Pest Attacked My Lettuce Leaves?

I planted romaine lettuce and I think it was attacked by some pests, but I can't identify them because I don't see any insects. I decided to replace with the new plants but it still get attacked. Do you know which pest attack my lettuce like in this…
Angela Radityatama
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