Stunned veg in ebb and grow, pls help

ligrow · Apr 5, 2016

good day guys,

I put my clones into ebb and grow system three weeks ago. I found I might have some issue with my plants. I can tell from its leaves and slow grow. Leaves edge turn brown as pics shows.

I run maxibloom at EC 0.7 ph 5.8
With EC 0 tap water
flood 15 mins for every three hours, no flood when lights off.

After some research, the symptom I have is more like Potassium deficiency, but I am not sure.
Pls help me out with identify my problem, and it solution for get rid of it.
Much appreciate
Happy grow

ligrow · Apr 6, 2016

somebody help pls.....

polishpollack · Apr 6, 2016

it's over fert. research flood amounts and frequency better. either your ec is too high or you are flooding too often. the little plant can be pulled out.

ligrow · Apr 6, 2016

polishpollack said:
it's over fert. research flood amounts and frequency better. either your ec is too high or you are flooding too often. the little plant can be pulled out.

Thanks for the feedback.
EC 0.7 Should be good right? I think I might flood too often for the young plants. I turn to 15 min in every 4 hours. Let's see if it helps.

the little plant can be pulled out.
Do you suggest me to pullout the little one that I post in pic? I think about that too. Still have little hope to see if it gets recover.
Cheers

polishpollack · Apr 7, 2016

the very small plant can be removed. looks like it's going nowhere fast.

ligrow · Apr 8, 2016

I longer my drain time. Flood 15mins every 5hrs still have the brown edge on new leaves. It's kind of cure up on tips.
Ec 0.7 ph 6.2 that I just measured.
With GH maxibloom. Any idea how to deal with it. I have veg them from clone to now for like almost two month already. Don't want to waste any time.
Pls give me quick check out, if you have any experience.
Much appreciate and happy grow

rkymtnman · Apr 8, 2016

EC is too high in my opinion. looks like nute burn on the tips in pic #2.

for plants that size, my EC is 0.3 to 0.5.
i'd give a 24hr flush with just plain 0 EC water. then start back on 1/2 strength of whatever nutes you are using now to get EC around 0.35. see how they look. get your pH down a bit too. 5.5 to 6.1 is best for hydro.

ligrow · Apr 8, 2016

rkymtnman said:
EC is too high in my opinion. looks like nute burn on the tips in pic #2.

for plants that size, my EC is 0.3 to 0.5.
i'd give a 24hr flush with just plain 0 EC water. then start back on 1/2 strength of whatever nutes you are using now to get EC around 0.35. see how they look. get your pH down a bit too. 5.5 to 6.1 is best for hydro.

Thanks for the reply
I will have it flush and cut it to half to see if it helps. Whats your highest ec When in veg and bloom?
I set my ph at 5.8 ph raise to 6.2 in about 5 days. That's the right sign when ph raise right?
Once again appreciate your feedback

rkymtnman · Apr 8, 2016

ligrow said:
Thanks for the reply
I will have it flush and cut it to half to see if it helps. Whats your highest ec When in veg and bloom?
I set my ph at 5.8 ph raise to 6.2 in about 5 days. That's the right sign when ph raise right?
Once again appreciate your feedback

yes, pH should rise slightly. try setting it at 5.5 and let it rise up to 6.1 then lower back to 5.5

i don't go above 1.2Ec for my entire grow.

ligrow · Apr 10, 2016

I flush the res and pull water out of system as much as possible, but still some in the ebb system. After I full ec 0 water in the res, it mix with the nutrients that left in the system. EC end up 0.2 and I set it for two days now. I found ph raise more than I expect. 5.8 to 6.2 in a day. Start to showing brown tips on newer leaves. Just took some quick shot.
Any advise are welcome!

polishpollack · Apr 10, 2016

I'm not a big fan of E&F because unless you really need to know what you're doing, it seems to have less forgiveness than DWC. With E&F you're exposing your roots to more oxygen but I think you need to use a low EC level. I personally don't know what to advise you on except that yellow brown leaf tips on dark green leaves usually means over fert. Usually. Also I think that putting three plants in a single container like this might be a mistake because plants can grow quite large and crowd each other. People always forget this fact and put too many plants in a small space. the pH will drift some and it's not worth fighting. focus more on a good EC level that is right for this grow method. I think you can have a range of 5.5 to 6.5 or so and still have good success. the drifting pH is good because certain material are taken up better at different pH levels, so dont' worry about a little drift. that's my non E&F based opinion. take it for what it's worth.

ligrow · Apr 11, 2016

polishpollack said:
I'm not a big fan of E&F because unless you really need to know what you're doing, it seems to have less forgiveness than DWC. With E&F you're exposing your roots to more oxygen but I think you need to use a low EC level. I personally don't know what to advise you on except that yellow brown leaf tips on dark green leaves usually means over fert. Usually. Also I think that putting three plants in a single container like this might be a mistake because plants can grow quite large and crowd each other. People always forget this fact and put too many plants in a small space. the pH will drift some and it's not worth fighting. focus more on a good EC level that is right for this grow method. I think you can have a range of 5.5 to 6.5 or so and still have good success. the drifting pH is good because certain material are taken up better at different pH levels, so dont' worry about a little drift. that's my non E&F based opinion. take it for what it's worth.

I ran DWC for my previous grow. I thought DWC has less forgiveness. ( root dont in water all the time = less problem) I only done ebb and flow once, its a aquaponic setup for growing some salad. I was sitting out side and res is under the sun, But i didint have any root problem. Thats why I thought Ebb system is easier to control...

I only have one plant in each bucket, i have top them already.
do you think the EC should be low around 0.3 right now? For plants big like this I usually go 0.6 without any problem.

They still stunned so bad, any feedback still welcome!
much appreciate.

Stunned veg in ebb and grow, pls help

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