Coco Newbie needs advice

Have you checked the runoff ec/ppm?

Did you flush after first noticing problems?

How dry is the coco getting before you water again?

Checked the coco for bugs?


Ill leave the rest up to better folks, those are just the questions I know will be coming

Looks to me like overfert, possibly locking out the calcium causing the burn spots and Tips. And check the runoff ec. Do you water till run off every time?
Also never let the coco dry out, can cause high salt level lockouts, and water when 50% dry.
I find going over 2 ec results in burns. I stick around the 1.5ec mark when in full flower unless the plants actually ask for more then bump it up a touch.
If run off is much higher than what's going in, flush with half strength ph'd water until it is within .5 ec of what the mix is.
Hope this helps.

hey guys

I feed them every other day so that I dont over feed them. so yeah I let it dry out quite a bit before giving them more nutrients. I dont give them plain water in between each feed like you're suppose to with soil.

Each time I feed, I give it about 4 gallons of solution and it barely trickles off any water.

I have not flushed it yet but it looks like I should immediately.

First of you are not watering enough. Water til runoff almost every time. Don't let it dry out. You may need to water every day rather than every other. But if you water til runoff you may be able to go every other in 20 gallon pots. Just sounds like if you were not watering to runoff, coco may not have been saturated enough to keep the plants happy for 2 days.

Cut out the Flora Grow (the green liquid). It is not needed in flower and I only use it every other feeding in veg too. I have been running the micro and bloom only as my base for over a year and get killer results. Most experienced GH Flora users do it this way. It will also help you keep ppms down and get rid of that ugly claw.

Give them a good R/O flush (may want to use 2 ml/gal cal mag with your flush and PH) letting a good amount of runoff drain from each plant. I'd say like 2 gallons per plant if you're in 20 gal. smarties.

Then resume normal feeding using my regimine above. It will get better soon after.

Picture 4 looks like spider mites or thrips. I see the white damage on the leaf that looks like some kind of bug damage may want to look into that as well.

Does it make a difference if I feed at a higher EC, say 2.6 for example over 1.8 if my plants are bigger than usual. These girls are easily over 4 ft tall and 4 feet wide. I'm just baffled how they can suffer from "nitrogen claw" if i'm feeding them 5ml per gallon of grow

drop the grow. 6/9 on the bloom micro. i would be careful going above 1.5ec. increase your feeding freq. and decrease your ec. have you checked your coco ph and ec? if you havent you might want to. i would also flush once a week. my personal schedule is 5 to 7 mls a gal of canna base, 3 to 5 mls a gal of cal mag plus 1 ml a gal of protekt. leaves me right around 1.0 ec to 1.4 ec ( my water is very soft at 0.1 ec). hope that helps.

It doesn't matter how big the plant is, too much is too much?
You can't go of ec/ ppm figures off the bottles or even from other grows, there are so many damn variables that will influence plant nutrient uptake.
Look at what your plants actually want, not what you think they need.
Even my last run in coco I had a strain that clawed like a bitch at only 1ec in flower and had to back it off even lower.

Sounds like you need to change up your water routine a bit.
Get some good run off coming out of the pots with half strength nutes. Easy to check with a meter the run off to see where your at, or untill the water is clear, I'm imagining it should come out pretty dark at the start.
And then monitor once the media is fully saturated untill the pots become at 50% weight.
Water again, but fully saturating again and aim for around 10% run off and do this every time.
And try to make the new high limit 1.5 that you go to, reality is your wasting nutes, and slowing growth as well. Coco doesn't need the high ppms, even more so If inoculating the media with Bennies, as the whole system becomes so efficient in breaking down and delivering elements you can burn alot easier.

Is reason for no run off because you have no where for it to go?

Hope this makes some sense.
Cheers.

Also drop the grow the grow like said.
Valid reasoning aswell is it going into 2nd week of flower nitrogen is not used as much.
It's only pretty mild and not that bad.
I'm thinking those lower leaves burning are the first signs of cal def from other macro nutrients being too high, but some think insect damage too.
Best way is to get some photos with the hps off to get the real colour of the plant showing.

iwould say stop or back the cal mag off i stop it at week 2 of flowering otherwise i get the same thing as you i never understood why untill i was told that once you have reached this time in your grow there is enough calcium stored in the coco and adding more will just stuff up the cation ex process and cause lockouts and other dramas.