skinny new leaves on 2 out my 6 plants

Hello,

I noticed the skinny new leaves on 2 out my 6 plants. What does this indicate?




Nutrient: mygreenplanet duel fuel kit

Days since seed in soil: 90

Current Stage: Vegetation

Temp =21 C

Humidity= 67%

Growing media: promix mycorrhiza

pH runoff for all plants =6

Ppm: unsure what the ppm is but I stopped adding nutrients since Thursday March 19th because my leaves were burning.i reintroduced quarter dosage of recommended nutrients on mar 26th.

Recent log:

Wednesday Feb 19: 3ml/2 liter jug

Sunday 24th: removed clay pellets and watered

Tuesday Feb 26th: topped soil and watered

Saturday Feb 29: watered, topped soil and cloned for sex determination

Tuesday, Mar 3, 2020: watered 3.25 ml

Thursday March 5, 2020: fimmed, vivosun fan broke

Saturday, March 7, 2020: started watering 1.5liters/plant

Sunday March 8 2020: clone 2 day 0 cuttings taken,

Thursday, march 13th, 2020, watered

Saturday March 14th,2020 728 kwh

Monday, March 16th, watered Rockwool with ph'ed water and nutrients. Heater turned off today mid-day, but is working again.

Tuesday March 17th, watered 1.75 l/plant

Thursday mar 19, watered 2 liters without nutes and ph'ed

Sunday mar 22, watered 2 liters no nutes. Many burnt leaves on all plants. Increased light intensity. Moves clone dome to water heater room and rearranged plants. pruned.

All Plant

Ph runoff 6

Thursday March 26, plants were very dry but healthy. watered 2.5 liters per plant, 1 ml/liter nutes. Plants . Water every 4 days.

All Plants

pH runoff 6
 

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