COCO COIR Have I messed up?

[Outgrowmie]

Hello everyone, as you can probably see I’m new here and trying my best. Cannabis is highly illegal here still because we are so far behind the times, so I need to be careful. Anyway, long story short my partner has stage 4 cancer and I’m trying to help save her so don’t care about the legality side of things.
I’m growing in a spider farmer 4x2 with an sf2000 rh50/55 and temps 21-25, feeding (GHE series) terra aquatica nutrients in coco to the T.
I’m on day 65 with gorilla auto and purple lemonade from fast buds.
My input is 1.8-20ec ph5.8
My run off is slightly higher and ph 6.4
Does anyone think I’ve over fed these and locked them out at the most crucial time and if so, can it be fixed or is it too late? Any input is much appreciated as this is my first grow and need a bit of help.
Thank you.

[Gingerbeard]

Fine looking dope! Everything looks pretty spot on. Those leaves are discoloring because you are at the end of flowering.
Here's something to help explain. No. You are not getting colorful leaves. You are getting nasty looking leaves. But it's the same thing.
The Cannabis Autumn Color Effect (Get Colorful Leaves!) | Grow Weed Easy

[dirtymike]

Cannabis in autumn. Pretty colors or ugly spots are the clue to some smoke coming. "Fine Looking Dope" Quote Gingerbeard

[OldManGrower]

I believe that you are overwatering and your PH is too low. Coco retains a lot of water. I water at 6.5. I water until the underside of the pot is damp, no runoff. You do have nutrient lockout but it's due to the low PH. A suggestion; Flush your plants with fresh PH 6.5 water. Re-water, with your nutrients and a lot of cal-mag. Do not water again until the top inch of the coco is dry and loose and the bottom of the pot (I have assumed from your pics that they are cloth) only moist. Water with 50-60% strength nutrients. Gorilla is a tough and forgiving strain, lord knows I've done my best to kill it on multiple occasions. Good luck with your grow and my prayers for your partner. Welcome to this site. Don't be a stranger.

[OldManGrower]

Damn! Gingerbeard is right and I suck! My only excuse is my oversampling of my latest grow. Yeah, late season leaves, missed the biggest clue.

[OldManGrower]

I'm going away now.......

[Gingerbeard]

Tee-hee. I was about to post a 'Man! Do we disagree!' post. Which is always cool. The pictures are the giveaway. Those flowers look super full of marijuana goodness.

[Outgrowmie]

Thank you and finger crossed I can finish this. Are you sure on a ph of 6.5. I was led to believe that’s really high for coco?

[Gingerbeard]

I fluctuate between 5.3 and 6.0 because different nutrients uptake better at different pH. That's my fact.
My opinion is that nutrient brand and water quality have a lot to do with what pH to run with. Some folk swear by a number that might kill others. Some folk use partial nutes while I can get to using more than recommended. Some folk water to runoff, I do not.
Whatever you have done, you have done well.

[Outgrowmie]

Thank you gingerbeard, I was starting to panic 🫨

[Bluey]

6.5 may be a bit high for coco but given you're giving it to it too low atm it probably won't hurt it and may correct a low pH in the medium. I'd give it a pH of 6.2 after a 6.5 but vary it 6.1 to 6.3

I'd be lowering your EC back to 1.7 to 1.8. 1.8 should be plenty. If you have a PK suppliment I'd give it one of those at half strength.

Try and get humidity lower and closer to 40% but do not let temps go higher than 23/4⁰C. The last two weeks go as low as you can but once again do not let temps climb above those numbers. Ideal is probably 22⁰C ish in late flower but it varies by strain a little bit.

I would not let the coco dry out and would be feeding them 3 or 4 times a day with little to no runoff most feeds with one decent runoff per week.

They are looking pretty good.

Edit. The little bit of twisting in the leaves it probably a fraction too much N or high EC. If your giving it a nitrate based calmag suppliment best stop. Too much of anything will lock out trace elements also, but it's likely just the low pH causing those spots.

[Outgrowmie]

Thank you for this and taking the time to read and reply. You think 5.8ph is too low for coco? Getting the humidity down is the hard part. My dehumidifier is already constantly running but so far so good and I can go lower. I’m actually really enjoying growing and have learnt more about plants in the last 3 months with doing this.

[Bluey]

You have pigment loss and rust spots showing on your leaves caused by too low pH so yes, 5.8 is too low in flower which is why I said raise it up.

[changeofpace2014]

Depending on the grow access, some of us are unable to flush on any kind of regular schedule because of environment factors. this is my case, however using something like hydrogard or enzyme plus really makes a difference - I am unable to find hydrogard so I have been using enzyme plus because I can not or refuse to start moving 5 gal buckets of run off out outside so I can drain.

A little Si will help with stress. Just my 2 cents -

Good Luck - unable to see pics they never resized for me...remained thumb nail.