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Lettuce

( Lettuce sativa )

 

  • Type of vegetable : leaves
  • Optimum growth pH range: 6.5-7.2
  • Optimum growth temperature range : 15-25°C
  • Organic matter requirements : moderately demanding plant
  • Rooting : superficial (45 to 60 cm)
  • Special requirements : Long-day plants, but current varieties are indifferent. High temperatures cause bolting and loose heads. Possible mainly in the dry season and under shelter in the rainy season, but difficult head formation.

 

  • Seed characteristics  
  • Number of seeds per gram : 800 - 1000
  • Nursery : Yes
  • Sowing depth : 3 mm
  • Line spacing : 25 - 35 cm
  • Interplant : 25 - 35 cm
  • Remarks : Prefer a lower density in the dry season due to the larger size of the apple

 

  • Seed germination time
0°C 5°C 10°C 15°C 20°C 25°C 30°C
49 d 15 days 7 d 4 days 3 days 2 d 3 days

 

  • Duration of the crop cycle under optimal growing conditions
Nursery Field
15-20 d 30-60 d

 

  • Optimal storage conditions
Temperatures Relative humidity Average shelf life
0°C 95-100% 2 to 3 weeks
Last change : 09/01/22