Should I Re-Amend after flushing for pH issues?

Hey people ,
General info:
day 21 since planting
Indoor
Temp: 74-80F
RH:50% to 58%
Strain:
Banana Blaze Auto by Dutch passion
Gelato Auto by Female Seeds
Medium:Coco
Nutrients: doctor earth 70% 4-4-4 and 30% 3-9-4
Medium run off pH before flush 7.9
Medium run off pH after flush 6.8
Cal mag source: Dolo Lime ( probably the reason my pH was so damn high)


Alright guys so this is my first grow, about 2 weeks ago I noticed some yellow blotches starting to form on the leaves of my plants. I started by checking the pH of my mediums run of and it was 7.9. The next 4 times I watered the girls I watered with a pH of 5.0. And when I checked the pH it was still at 7.9. So I decided to flush them since they were more established now . Once they were done being flushed they did droop but after about an hour or so they have sprung back up. My question is, should I Re-Amend my medium or should I just wait until the next time I planned on feeding them?

You're in coco. Just set the pH of the nutrient solution with pH Down when you mix it up and be done with it. Ditch the dolomite lime. You don't need to be chasing runoff and dumping 5.0 pH through the coco.

I’m not using a nutrient solution I’m using dry amendments

Yeah I know people grow that way. Good luck.

I think what he’s saying is the dolomite is going to try and keep it at 7 and you’re going to want 5.8 so now you’re going to adjust your ph to below 5 to calculate for the lime kicking it back up and hopefully your run off will come out right or you’re going to end up flushing tons of gallons through again only to find out you’re back at square one.

OR you could get the liquid nutrients and add to your water and ph it....done.

Wattzzup said:

I think what he’s saying is the dolomite is going to try and keep it at 7 and you’re going to want 5.8 so now you’re going to adjust your ph to below 5 to calculate for the lime kicking it back up and hopefully your run off will come out right or you’re going to end up flushing tons of gallons through again only to find out you’re back at square one.

OR you could get the liquid nutrients and add to your water and ph it....done.

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Or run some myco (great white), the bacteria create different kinds of acids and help stabilize the ph of the medium

The thing is that coco is best treated like hydro with waterings of nutrient solution. I know people try and use it as a base and add dry amendments but more often than not people run into problems with that style of growing with coco. Coco is so easy when treated like hydro. But like I already said, good luck. I hope you pull off a successful grow.

Okay so I get what you guys are all saying but I already flushed the plants, and all I’m trying to find out is wether or not there is still enough nutrients in the medium or if I should amend more into it

Ndw2867 said:

Okay so I get what you guys are all saying but I already flushed the plants, and all I’m trying to find out is wether or not there is still enough nutrients in the medium or if I should amend more into it

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That's going to depend on what amount you added to volume of coco and how much you flushed it. There's no way anyone can tell you what the nutrient level is in the coco now.

If he used dry organic amendments, there is no such thing as flushing that out.

You should just transplant into a corrected medium bigger pot. If the plant pulls through you will get a bigger yield anyways

Let me tell you from past times I’ve flushed like that. I was so low on micros from flushing them all out of the soil. I ended up with a zinc deficiency in soil. Less flushing the better IMO

They’re in 3 gallon pots and I did 3 tbsp per gallon
70% 444 30% 394 and I used about 5 gallons on each planter to flush ( honestly wasn’t a big flush and like I said the plants have already bounced back from the flush itself, they’re not longer droopy and this was only about 5 hours ago )

You can simply steep ( aerate ) dry fert in a cheescloth bag to create a tea ...... ph that mix to meet coco ( *5.5 - 6.0 ).
I prefer 5.8 as with my drain to waste setups.

By simply bubbling a tea overnight prior to use , streamlines the issue and not risking ph swings from your application.
Dump the dolo lime since you are not trying to correct medium like it was soil. Simple check with ph / ppm pen allows you to “ control “
your feeds by knowing what’s going in.

Coco has a neutral ph , and what you are doing is more for soil.

Dolomite isn't a "cal mag" I would use in coco. I prefer gypsum for more calcium. I've been doing organic coco for years. The thing that coco doesn't have, is life. Get some worm castings in the mix and look up a good soil recipe. Using coco instead of peat. Or get some kind of bacteria / fungi tea

^^^^ yes , you have to bring everthing to the table with coco especially the bennies .