Cant find what is wrong
- Thread starter Fultron
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Fultron
Member
These are my 2 mothers I just watered them with straight RO water with ph of 5.8 hoping it fixes what ever is wrong. It is so hard to tell what is wrong cause all show different signs and are all getting the same feeding so I can understand how the Lucas formula makes sense to use
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Yep. clear as rain now. Drop the cal-mag. flush them through with pH 6.0 water a few times, don't just top feed them, although you can to get an idea of whats in the root zone, but give them some time to process out the excess, then feed without adding cal-mag. Keep that shit on standby for if your plants tell you they want it. Switch to Lucas formula and you wont regret it!
rkymtnman
Well-Known Member
when you get done with this grow, throw all that rockwool away and use GH rapid rooters instead for your clones.
No not top water. You need to let them sit in it so they have time to process out the crap. It's not just the rockwool, it's the actual plant tissues which are clogged, imho. Ditch your res entirely. fill it with RO water, pH it to 6. Feed them for 15 mins, every 2 hours, say.. 4-5 times.. then add your nutes back in. You should notice your reservoir pH swings and your PPM rises as you are flushing.
Absolutely 100% you should water according to height. The idea with flood and drain is to do it fast, so that you can get full height on your pots without having them in the water for too long. 6-15 minutes.. it's all personal preference. I feed for 10 minutes but my fill time is rapid. 15 mins im saying for flushing.
Fultron
Member
You dont think 4 hours of being submerged will drowned them out ?
rkymtnman
Well-Known Member
no.
if you aren't comfortable with that, fill it to the top with RO, let sit for 1 hour, drain, and repeat 3 more times for a total of 4 hours.
What type lights did you have these under before? The swap to LEDs from HIDs can be challenging. I suggest investing in a cheap infrared thermometer to measure leaf temps and do whatever it takes to keep leaf temps around 85 degrees F. I find it odd that just new growth is showing these symptoms. Remember you have to keep everything synchronized, hotter more feed cooler less feed, same goes with light intensity and co2 everything has to be synchronized. Under LEDs your plants will not transpire as much as other light sources with increased infrared heat so you will need to increase room temps into the lower 80s in order to get leaf temps around 85 and I would also recommend decreasing nutrient concentration by at least 25% when going to LEDs from HIDs.
Fultron
Member
All I have is led one different is they went froma mars to a spider led
Fultron
Member
Can i just continually flood for for hours and let it recirculate or should I let it sit
Well if you have salt buildup you might run something like floraklean, clearex, final flush or something to help break down the salts, other wise I would just cut back on the ppms and continue as you have. Continuously check PH and PPMs and make sure all other environmental factors are in check, invest in the infrared thermometer and make sure leaf temps are 85, usually LEDs only raise surface temp a few degrees so lower 80 ambient is about right. Look into VPD (vapor pressure deficit) and follow the chart.