Zkittlez auto growing at different rates

From a fellow grower: I’m growing 2 seeds and they’re 5 days apart but one is a runt and the other is growing like on steroids.

  • Strain: zkittles
  • Type (fem/auto/reg): auto
  • Climate (indoor/outdoor): indoor
  • Medium (soil/hydro/details): soil happy frog
  • pH of runoff or solution in reservoir: 6.2
  • Nutrient mix strength (EC/TDS): fox farm trio
  • Light type & schedule: 12/12
  • Temperatures day & night: 70/60
  • Humidity day & night: 40/55
  • Ventilation: mars hydro tent
  • AC: 24/7
  • Humidifier: N/A
  • De-humidifier: N/A
  • Co2: N/A


You left the light WAY to far from your plants , and you got both of the responses autos do to that 1- they stretch and your nodes become far to distant for healthy foliage growth and 2 they become stunted barely growing half a foot , nothing you can do now except get started fresh and use the photone app and learn dli ( i start at 12 dli almost double of what i was giving when i judged by par maps alone)

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3 plants in the picture but I assume it is the one in back and one on right. As @GreenSnek said, it appears to be lack of light for the one tall one for sure. Your “runt” is probably more on track considering the low temps you record.
This White Widow auto is almost 5 weeks from sprout. I “allowed” it to stretch just a bit. It is 8" tall.