Lettuce indoor hydroponics problem

[mamdot91]

Hello,

I am a small scale commercial lettuce grower and I am experiencing a problem with my lettuce that probably keeps them in shock and slows growth resulting in overall poor Yield/size.

Basic details:
Controlled temperature: 21C
Humidity: 60-70%
DLI: 12-14
EC: 1.7
Ph: 6

So heads are experiencing some issue from the base of plants causing them to develop red spots initially and eventually the leaves die off.

I am new here, can someone guide me how to post pictures? That way some of the experts here could immediately tell me what the problem is.

 

[mamdot91]

Here are pictures to show issue developing in plants that are just freshly transplanted into the hydro NFT system

 

[Lyo S.]

Hi, had an expirience by lettuce, crunched. In Crea it was growing by plenty of sun, but with closing from direct rays. Also it was minerals complex. Spinat had not much seeds outwisted, was a big problem to retrive this. Actually it was not the profile (we had tomatoes). So, try up: 1. The saving some greens by not using in food, take after green from the 2nd and 3rd portions of raised. 2. Use small tare for them catching up together.
Act. It is fine direction for planting! Luv!