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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 is showing browning between vains and curling of upper leaves. I think it might be a calciulm or boron deficiency. I will monitor the plant a couple of days and then revalutate.
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
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 without potassium hydroxide to lower the pH a bit.
Last week I stopped feeding and started flushing this plant (probably a little bit too late).
This week I'm just watering the plants with tap water, removing some leaves, and fighting the parasites.
First harvest ever! I'm quite happy with the result. The target was not big volumes, but a manageable small plant that could be harvasted on a balcony.
The smell and the taste are quite good.
That is interesting, maybe you could use an eazyplug pyramid mini, instead of soil next time, it would fit inside no problem, that is unless you are trimming the roots. You can see the pyramids mini in my grows.
Hey superquark!
Looking at the leaves, you might want to stop putting anything in the water..!
They are becoming burned where the plant is trying to get the excess nutrients as far away from its core as is possible!
Since you appear to be watering often, and feeding at least once a week - seeming to only use the water when you are trying to adjust the pH - perhaps try watering only a little every other day without added nutrients or supplements for a week or so.
The soil has probably retained a lot of extra nutrients, which is driving the pH down! It started a full point above where it is now!
superquark
