Growing Lettuce

lactuca sativa : Asteraceae / the daisy family

Jan F M A M J J A S O N Dec
  S S                  
      T T              
      P P P P          

(Best months for growing Lettuce in USA - Zone 5a regions)

  • S = Plant undercover in seed trays
  • T = Plant out (transplant) seedlings
  • P = Sow seed
  • Easy to grow. Sow in garden, or start in seed trays and plant out in 4-6 weeks.. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 46°F and 81°F. (Show °C/cm)
  • Space plants: 8 - 12 inches apart
  • Harvest in 8-12 weeks.
  • Compatible with (can grow beside): Carrots, Onions, Strawberries, Beets, Brassicas, Radish, Marigold, Borage, Chervil, Florence fennel, leeks.
  • Avoid growing close to: Parsley, Celery

Your comments and tips

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24 Oct 23, Anonymous (Australia - sub-tropical climate)
You grow different kinds of lettuce in the cooler months to the hotter months.
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11 May 23, Kim Shallcross (USA - Zone 9b climate)
Can it get too hot in May for lettuce, mine seems to have turned bitter and is bolting
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14 Jun 23, Wendy (USA - Zone 7b climate)
You bet! Lettuce doesn't like the temperature to be above 80 degrees. Mine is bolting and bitter now too ( June in 7b)
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22 Sep 21, Ana Maria (USA - Zone 10b climate)
Is Sept 25th to early to start fall Lettuce in my zone 10b? San Felipe, baja, north.
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26 Sep 21, Chris (Australia - sub-tropical climate)
Lettuce won't germinate if the soil temperature is too high, but if you can start them somewhere shady they might do ok.
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17 Jun 21, Harry C Carter (USA - Zone 10a climate)
Can I grow red leaf lettuce in zone 10 A (Cape Coral Florida)?
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21 Jun 21, Colleen (USA - Zone 10b climate)
Yes you can, but depending on how hot it gets where you are, you should choose a heat-tolerant variety or it will bolt too quickly. I recommend the red varieties of summer crisp Batavian lettuce. You should be able to get them at Swallowtail Gardens online if they haven't sold out for the season.
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25 Nov 19, william rowe (USA - Zone 9b climate)
When is the optimal time to grow romaine lettuce in 9B, Ocala,Fl
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27 Oct 23, Nancy (USA - Zone 9b climate)
I grew romaine last year in the Phoenix Valley (9B). I think I waited until December to sow the seeds. We got a really nice crop of it... but last winter it seemed to last much longer than normal, it was still very chilly in Feb. last year (low 60's), when generally we get into the mid 70's then. You could try starting indoors.
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04 Mar 18, Lonnie (USA - Zone 6b climate)
Planting lettuce
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Showing 11 - 20 of 23 comments
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To increase the levels of Molybdenum (Mo, also called Molly) in your soils -- wood ash (from a fireplace, firepit, or barbeque) can be incorporated into the soil. Alternatively, Banana peels are an excellent source of Moly. Animal manure tends to (grass/grain/vegetable feeders) tend to have a decent amount of Moly in their manure. If all of these are out of reach, perhaps try incorporating wood chips/bark mulch in your garden. You can make bark chip paths, use the paths, then the following year when the chips are broken down mix them into the soil. OR -- just mix the wood chips (bark, mulch, whatever) directly into the soil. As the wood is breaking down it takes a lot of nitrogen. I would expect to find Moly in leaf mulch - but have not found any reliable sources that have stated this as a fact. If you choose to use chemical forms of Moly remember that this is a TRACE element - VERY little is needed and over application can result in a OTHER problems. Staying organic almost guarantees you will not over apply. If you live in an area where wood burning stoves and fireplaces where common for heating (pre- electric fireplaces and stoves) - and you know people old enough to have been around when wood ash was common in the garden (there was no place else to put it) - they can tell you how amazing the gardens where back then.

- Celeste Archer

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