Clyde4210
- 516
- 63
I'm using Botanicare nutrients (grow, bloom and cal -mag) with PowerSI recently added at bloom. Using RO water in a hygroton flood/drain system. Growing in my basement without heater or dehumidifier for now. Monitoring Humidity, temp, PPFD, DLI and VPD. Usually the humidity is crazy low here so I was able to use ventilation alone to manage it win the tent. Temp runs low at high 60s to low 70s slowing growth but still managing.
I have discovered that even though the nutrients were labeled as Hydro, and I diluted them to 1/2 the recommended, they were still too strong. Just started reading this thread 2 days ago and the table that @PK1 shared on managing EC and nuts on 12/5/21 as well as the advise by @Lilome on the same day, to check TDS after each addition of different nutrients was HUGE! Made the lights go on for me.
I am running a small commercial hydroponic greenhouse raising lettuce for local restaurants and thought I had a fair handle on using nutrients and growing- but the object for lettuce is NOT to bloom and I have had to unlearn things for cannabis.- So The pictures show my first grow -Critical Purple auto/fem(x2) and second seedlings- AK47 and Gold Leaf started 3-4 weeks after. Critical Purple seedlings were my first guinne pigs and 2 survived to bloom, one was stunted for 9-10 days and I left it in to grow to see what would happen- knowing that it would never reach it's full potential and would suffer because I would be adjusting everything to the needs of the other thriving plant. Still doing much better than I expected and with the stretch of the bloom it is the much taller plant now. This is the one with the leaf color changes I mentioned that were similar to yours- started exactly in the same area and was progressive from oldest fan leaves (since removed). Since decreasing TDS to low 800s everything's has started improving- obviously there was a lot of room for improvement!
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