Nute lockout in DWC?

Hiya
Im having a horrible time with a Nirvana Raspberry Cough in my first dwc. It started in week 3, showing a deficiency (sulphur i think) so I upped the nutes and added epsom salts. This made my pph skyrocket so i flushed in ph'd water and slowly tried to reintroduce feeding, only for the plant to show more signs of deficiency. Upped the nutes again, now shes at a crazy pph (1800) and still has yellowing of new growth and brown spotting on certain leaves.
It has to be nute lock out...? I cant imagine at that pph it can be a deficiency.
Apart from a period when i wasnt paying attention to ph it is at a constant 6.0 - 6.2.
Ive already tried flushing and reintroducing nutes only for extremely pale green/yellow new growth to return immediately so im really stuck how to proceed.
Any advice? (be gentle, i am a complete noob and just want to grow some quality herb!)
Cheers

Lower your ppm to ~ 600

PetFlora said:

Lower your ppm to ~ 600

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This is good advice. It's going to take a little bit of time but this plant is definitely capable of making a comeback.

Keep your PPM's in the 600-700 range and keep your water within a 5.8 - 6.1 PH range.

You didn't mention what nutrients you're using so I dunno if it's a complete formula or not.

Ok, previously ive only tried ditching the rez and starting on only phd water. Ive not tried lowering the ppm.
Just did it, its now at 500ppm and ph 6.
Im using the full Canna line. Not massively impressed so far. Heres another pic, obviously shes not doing too great!
Thanks for the help. Fingers crossed she gets better soon!

shiva71 said:

Ok, previously ive only tried ditching the rez and starting on only phd water. Ive not tried lowering the ppm.
Just did it, its now at 500ppm and ph 6.
Im using the full Canna line. Not massively impressed so far.
Thanks for the help. Fingers crossed she gets better soon!

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I use Canna nutrients and have had a lot of success. I actually use Canna Coco A&B in a flood/drain application which is a little unorthodox since they make a "hydro line", but this has proven to work really well for me.

The big thing is keeping PPM's and PH dialed in. If you are in a single DWC bucket you can expect a lot of PH and PPM swings since you're only working with a couple gallons of water at a time inside the bucket. When the plant pulls nutrients/and or water out of the res it's going to affect your PH & PPM. As the plant matures and the root zone increases in size, this will become more prevalent. This is why a lot of growers who choose the DWC route add a reservoir or setup a RDWC.

Since you mentioned you do have a res - try filling the res with 1/4 strength nutrients and make sure it's at 6.0 PH. Monitor things 2x a day for the next week or two and I have a feeling this plant will bounce back into a happy plant

Ha ha youre the second person to say that, i hope youre both right!
Ta for the input guys, appreciate it

Check this out.
http://www.ilovegrowingmarijuana.com/hydroponic-growing-schedule/

smokebros said:

This is good advice. It's going to take a little bit of time but this plant is definitely capable of making a comeback.

Keep your PPM's in the 600-700 range and keep your water within a 5.8 - 6.1 PH range.

You didn't mention what nutrients you're using so I dunno if it's a complete formula or not.

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600-700 ppm only during FLOWER, not veg. I will get sexing even ~ 500, but my nutrients are super efficient

For the next few grows I will be finishing off my stash of Emerald Harvest up to 6 different bottles to measure. It's a PITA, but the results are great. I do add to them aminos, enzymes and yucca combined they make the nutrients more bioavailable to the critters growing on roots

After which I will try Green Nutrients Mega Crop a mostly complete dry powder

shiva71 said:

Im using the full Canna line

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just to make sure, it is the canna line for dwc? not coco?

and when you say the full line, exactly which ones are you using and what amounts?

Canna is a highly respected nutrient co.

It aint the canna lol

Show us roots. Whats the rh , temps?

If you went to 1800 thats pretty fn high lol

I agree set your ppm to 5-600 ppm x700 scale.
Set ph in accordance to how it drifts ie if it drifts down set at 6.3 if it drifts up aet at 5.8

Then let them be for a week lol

shiva71 said:

Ha ha youre the second person to say that, i hope youre both right!
Ta for the input guys, appreciate it

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Canna has been around for a long time. They know what they are doing.
Its not the nutrient, its the user. No offence.

Don't use only tap water in hydro, always use nutrients. There is no medium to flush.
Check your roots and keep ph closer to 5.8
Make sure your ph meter is properly calibrated.
Lower ppms.
Make sure you know if your water is soft or hard. If soft add a cal mag. Use the canna online chart and set it to soft or hard.
You shouldn't need to run full strength to the chart.
If you raise your light a few inch you will slow the process down until you have the plant in good health.

Remember less is often more. Throwing in a bit of extra rhyzo or cannazym and especially pk13/14 is not a good idea.

Thanks for replies guys!
Cant upload px for some reason. When it was up to 1800ppm I had the following in the rez: Hydro Vega A/B 3ml/litre, Rhizo 2ml/L, Cannazym 2.5ml/L, Boost 2ml/L, CalMag 0.5ml/L and a tablespoon of Epsom Salts.
Temps 85°, RH 35. And heres something wierd pph has risen from 650 to 820 since yesterday. Brown spots have got worse overnight.
There are some bugs on my yellow sticker - could that be the problem?
Really appreciate the help, id be lost without it!

Isnt cal mag and epsoms a bad mix?

Cla mag is usually cal nitrate with mag sulphate

Epsoms is mag sulphate

You can lock out cal with TOO MUCH mag

Need to get them temps down and humidity up

or adjust the feed to the temps and humidty .

Look up vapor pressure deficit.


If you're running hot you need to feed a lower ppm high water mix.

so the plant doesnt clog itself up transpiring all the water

Cheers $moke. I can get the temps down no probs, ill look into raising RH. What do you make of the rising ppm? Did a bit of reading, it seems rising ppm means the plant is absorbing water but not the nutes, which points to a ph problem but i check it daily and its always around 6...
Just filled up rez with 6 litres of bottled mineral water and Hydro Vega A/B at 1ml per litre (25%). ppm 520 ph 6.2. The mineral water is clutching at straws really. I wish i knew what the hell is wrong with her, she's looking sicker by the day and im doubtful she'll pull through...bummer
Cheers

shiva71 said:

Cheers $moke. I can get the temps down no probs, ill look into raising RH. What do you make of the rising ppm? Did a bit of reading, it seems rising ppm means the plant is absorbing water but not the nutes, which points to a ph problem but i check it daily and its always around 6...
Just filled up rez with 6 litres of bottled mineral water and Hydro Vega A/B at 1ml per litre (25%). ppm 520 ph 6.2. The mineral water is clutching at straws really. I wish i knew what the hell is wrong with her, she's looking sicker by the day and im doubtful she'll pull through...bummer
Cheers
View attachment 4130525

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yep, you burnt the shit out of her with the 1800ppm.

only thing i would do at this point is flush for 24hrs with RO water only. then come back with even lighter nutes (300ppm) and pray for the best.

i harvested a raspberry cough a few weeks ago and the smoke is really good.

Yeah I guess i did. She's been on much lower ppm for the last few days but it looks like the damage has been done ;(
How did your RC look, i dunno if it was because of the problems but my one was very stocky and bushy, not at all sativa like...

shiva71 said:

She's been on much lower ppm

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with the lower ppm, is she eating (ppms dropping) or are they going up?

if you had a vitamin additive (superthrive, kelp extract, etc), try that with a plain RO flush for 24hrs and then start back with very light feedings. don't give up just yet!

and mine looked like yours, bushy, indica looking. no red colors like the pic on nirvana site either. but a light berry taste for sure.

Im afraid I dont have access to RO water. FFS the ppm has risen about 80 in the last 2 hours, wtf is going on?

shiva71 said:

Im afraid I dont have access to RO water. FFS the ppm has risen about 80 in the last 2 hours, wtf is going on?

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how about distilled?
if not, plain tap water would work.
it's leaching out excess nutes right now.

if you do flush, throw that water away after 24hrs as it will have nutes in from the plant leaching htem out