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First Time Medical Grow

14
1
605
4 years ago
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Indoor
Room Type
ScrOG
weeks 1-10
FIMing
weeks 1-2, 7
Topping
weeks 7
40 l
Pot Size
Grow Conditions
Week 1
Vegetation
18 hrs
Light Schedule
25
°C
°F
Day Air Temperature
11+ conditions after
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Nutrients
ml/l
ml/gal
tsp/gal
Growers Ark Root Tonic
5 ml/l
Growers Ark Grow A
3 ml/l
Growers Ark Grow B
3 ml/l
Grow Technique Usage
ScrOG
Technique
FIMing
Technique
Commented by
Medicalflower Medicalflower
5 years ago
I have never used a NFT system before so this is a big learning curve. During the first week, the PH spiked to 6.8 and caused a little bit of tip burn. I have not had the same issue since. The two plants used one tank each during the two weeks they vegged for. Half way through the first week, I swapped a HPS bulb for a metal halide. I think you can see a massive difference in the two plants. I had some problems keeping the humidity levels up in the room. They where dropping really low during the day. This was causing a some leaf curl. I added a couple of evaporators into the room which helped to raise it some.
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Grow Questions
Medicalflower
Medicalflowerstarted grow question 5 years ago
My EC has increased from 1600 to 2300 in 24 hours. I suspect a nutrient lock out. Should I have flushed the plants for longer?
Solved
Feeding. Other
like
ijustdontgiveaf
ijustdontgiveafanswered grow question 5 years ago
The plants usually tell you how much food they want/need, so i would listen to them. If the EC raises by that much it's either that they don't require as much food (i'm not sure if you follow the manufacturers instructions, or measure to get the correct readings?) or water has evaporated in a higher amount, which would also raise the EC. You mentioned a high temperature, so that could lead to a lot of evaporation, so if possible i would try to keep that in check first. Maybe a chiller might help? Given plants are always grown in different environments i find that i can't really rely on the manufacturers recommendations, but i check daily (sometimes twice) what's the EC in my reservoir. If i notice the EC goes down over time, i know the plants feed more than what i provide, so i add a bit more next time, and if the EC goes up, i know they don't take up as many nutrients and lower it accordingly. I usually then calculate to the difference of what i gave them (i.e. if i gave them 1.6 and they go up to 1.8, then the difference is 0.3, so i take that off the 1.6 the next time and only give 1.3). I do have to say though that i don't have much evaporation happening, as it's not getting that hot here, so that's something i don't have to consider as much, but if i had to, then i think i'd dilute it even more, so i can take some water evaporation into account and don't get a much-too-high-EC value in the res.
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CaptainCream
CaptainCreamweek 8
Nice Bush. Good job man Stay clear and safe to harvest.peace👊