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After germination the plants stretched quite a bit, so I:
- moved them outside to have lower night temperature (14°C instead of 22°C)
- added a cold (4000K) grow light (LED full spectrum spot light, 575lm, CRI 90) to increase light exposure from natural sun to 16h/d
I measured the soil pH (which was supposed to be 6.4) with a calibrated probe and found out it is more like 7.0 so I:
- started to give them a few drops of very low concetration rain water + nutrients solution (2.0-0.9-1.4 N-P-K) + a couple of drops of lemon juice to lower the PH
On day 11 it rained a lot so I:
- moved the plants back inside lo let the water saturated soil dry out a bit.
On day 12 I found some aphids and a leaf miner so I
- sprayed a 12.5 mg/l solution of Deltamethrin
On day 16 plants were:
- transplanted into bigger pots with a better soil with a PH value of 6.3
- watered with a 2.0-0.9-1.4 NPK solution + micronutrients
On day 18 plants were:
- mooved back outiside
On day 22 plants were:
- topped
- sprayed a 15.3 mg/l solution of Deltamethrin
On day 23 plants were:
- watered with a 2.0-0.9-1.4 NPK + micronutrients PH 6.0 solution
On day 24 plant were:
- transplanted into bigger pots
- trained with wires
This plant looks healthy.
On day 29 I:
- measured the soil acidity and it was very low @ PH 5.5
- washed the soil with a lot of tap water @ PH 7.4
On day 30 I:
- measured the acidity again and it was @ PH 5.9
- removed the yellow leaves and the branches growing on the lower side
- adjusted the wired to train the plants
On day 31 I:
- watered the plants with a solution of 7-3-5 NPK + micronutrients + hydrated lime to increase PH
Almost every day I:
- adjust the wires to continue the LST, keeping the plants compact
On day 39 I:
- watered the plants with a solution of 0.1g/l of hydrated lime lo raise the pH
On day 51 plants were:
- watered with a solution of NPK 4-6-8 + micronutrients + Bionova PH+
- put under warmer and more powerful light (2452lm 2700k)
I'm still struggling with the pH even if up to last week I always addded hydrated lime to the watering solution.
I switched to Bionova PH+ (potassium hydroxide) to achieve faster pH increase.
I finally managed to get the pH right using potassium hydroxide. I'm adjusting the wires to train the plants every couple of days.
This week I will feed them with a solution of NPK 5-7.5-10 + micronutrients.
superquark
