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Covert Cannabis

Active Member
Thats gonna be classic nutrient burn right there my brother... or the method of eradication you used on the mites... just give her water without ANY nutrients this week my friend, see how that treats her
 

Hydro4life

Well-Known Member
My last auto run did same thing. In soil. Couldn’t figure her out. Eradicated mites early on and it was one thing after another. Leaves looked identical. Flushed - lowered nutes - ph was perfect I just couldn’t stop the yellowing.
That sucks man. Mites are hard to get rid of. When you think you’ve killed them, they come back twice as hard!
One of the reasons I stopped growing in soil and went to hydro was to not have to worry about fungus gnats etc eating my roots. I’ve noticed that when plants start yellowing and leaves curl/twist etc, it’s usually an issue at the root zone or a bug issue like broad mites etc.
You may have had root rot? Letting the soil dry out to some degree between waterings minimises the chance of this and reduces fungus gnats if you do/did have them.
 

shiva71

Well-Known Member
Not a half flush, empty all the water out of your bucket and rinse bucket out, rinse off air stones and air lines that have been in the water. The roots hold a lot of the salt so make sure you wash the roots out with fresh water and dump everything that’s been rinsed off.
Fill your bucket up with fresh water, add base nutes at half strength and adjust ph.
Try running 800ppm for a couple of days, really free up the root zone and make the plant a little hungry then slowly up the ppms and monitor ppm before you top off bucket and after (before adding nutes to desired ppm) that way you will get to know how the plant is drinking/feeding.

the salt build up is from your nutrients, the stronger you run your ppms the more salts you are adding and you will need to do bucket change outs more frequently especially if ppms are too high for the plants requirements.
Hope that helps shiva :cool:
Ok thanks that's what I'll do!
Cheers :)
 

shiva71

Well-Known Member
Urghh. My bucket was like a swamp!! So everything cleaned, rinsed, roots given good rinse under shower head, everything cleaned up, 700ppm pH 6.
Would you expect ppm to rise as the she dumps whatever it was that had built up?
 

Hydro4life

Well-Known Member
Urghh. My bucket was like a swamp!! So everything cleaned, rinsed, roots given good rinse under shower head, everything cleaned up, 700ppm pH 6.
Would you expect ppm to rise as the she dumps whatever it was that had built up?
Well done!
5.8 is pretty much optimum for hydro/dwc. But letting the ph drift through the ph range is best as the plant will absorb a wider range of macro and micros as everything is absorbed at a slightly different ph range.
Set your ph to 5.5 and if the plant is healthy the ph will most likely drift up.
When ph gets to around 6.3/6.4, then ph down to 5.5 again.
Always check ph AFTER topping up with water and adjusting ppms. It’s just a continual cycle from here on in with the exception of doing a bucket change every so often.
(To Prevent salt build up and fully rebalance nutrients in solution)
Just watch how your plants look and what they do over the next couple of days (doesn’t take long to see a change in dwc)
Generally If the leaves start getting a little light in colour then up your ppms to say 900 for example, and watch how they react.
Dwc will teach you how to read your plants. Even to the point where often, you will know what they will do/how they will react before they do lol. ;)
 

shiva71

Well-Known Member
Thanks Hydro good advice there. Yes I'd been topping up for too long without doing a res change for a few weeks now so yes some kind of build up seems likely.
Cheers man!
 

shiva71

Well-Known Member
Ppm dropped from 700 to 600, you said 900 so im happy to go for that. Noticeable yellowing last 24 hours, but its very strange, the bud on the left seems normal, green fan leaves, the one on the right clearly yellowing...dunno what to make of that?!?
Cheers!
IMG_20200326_104634672_HDR.jpg
 

Hydro4life

Well-Known Member
Looks like light burn to me. Is the yellowing on the tops that are the closest to the light? What light are you using and how close?
 

shiva71

Well-Known Member
Looks like light burn to me. Is the yellowing on the tops that are the closest to the light? What light are you using and how close?
Nah, that bud on the left with the yellowing isnt closest to the the light. Its a basic QB288 135w about 24' from canopy.
Cheers!
 

shiva71

Well-Known Member
You’re running 900ppm now shiva?
Can you get a pic of the whole plant?
Yes, well 880 which has fallen to 800 in 24 hours, so i'll put it up to 1000 and see how she responds. Using Canna Flores A/B with a bit of PK13/14. Turned lights off so you can see better, whatever it is affecting that one branch isnt affecting the rest nearly as much. Buds looking good, i just hope whatever it is doesnt get to them! pH ok, rising up from 5.8 I brink it back down when it gets to 6.3 or thereabouts.
Cheers!
 

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shiva71

Well-Known Member
Shes looking good I reckon, Im happy. Not very frosty and yes theres some yellowing but buds pretty chunky! She was supposed to be 10 weeks but thats a joke, i think this is week 14 and I think she has maybe another 2. One noticeable thing is that certain buds are maturing way quicker than others which is a bit weird...
IMG_20200331_112609572.jpg
 

Hydro4life

Well-Known Member
Haven’t been on for a while,
sounds good what you’re doing shiva. Just got to get her to the finishing line now, still a little while to go by the looks of things.
Main thing is to learn from this grow and try to have a consistent grow next time, regularly monitoring ph, regular bucket change outs and you’ll learn to read your plants in regards to feeding.
You’ve done well this grow!
I think next grow will be even better from what you’ve learnt with this one 8-)
 

shiva71

Well-Known Member
Haven’t been on for a while,
sounds good what you’re doing shiva. Just got to get her to the finishing line now, still a little while to go by the looks of things.
Main thing is to learn from this grow and try to have a consistent grow next time, regularly monitoring ph, regular bucket change outs and you’ll learn to read your plants in regards to feeding.
You’ve done well this grow!
I think next grow will be even better from what you’ve learnt with this one 8-)
Cheers Hydro! It's actually my 2nd dwc, first one was a breeze, got about 1.5g/w and I lost 10% to bud rot which kicked in during some baking hot weather 35°+...that grow I let the buckets run down, dumped what was left and refilled. This one I was topping up and adjusting ppm, crucially I wasn't doing regular rez changes I think that's why there were the build up/lock out issues I had.
Gotta love dwc. No second guessing what's going on in the medium, you know exactly what the plant is getting, ppm, pH, temps etc...which I think is cool.
Do you do a single plant in a bucket too?
 

Hydro4life

Well-Known Member
Cheers Hydro! It's actually my 2nd dwc, first one was a breeze, got about 1.5g/w and I lost 10% to bud rot which kicked in during some baking hot weather 35°+...that grow I let the buckets run down, dumped what was left and refilled. This one I was topping up and adjusting ppm, crucially I wasn't doing regular rez changes I think that's why there were the build up/lock out issues I had.
Gotta love dwc. No second guessing what's going on in the medium, you know exactly what the plant is getting, ppm, pH, temps etc...which I think is cool.
Do you do a single plant in a bucket too?
Yea for sure. And everything happens fast, so if you make a change you will see how it’s affecting the plants in a matter of hours in some cases.
I’ve grown a lot of single plants in single buckets, 4 plants in a single 50 litre container, 6 plants with shorter veg time in 40 litre containers, an 18oz plant in a single 10 litre bucket (whole bucket was filled with roots! And took about 5 litres to fill bucket from empty lol)
Currently growing outdoors in coco atm.
Have grown outdoors in dwc too haha. :eyesmoke:C4D1F9A8-6CF0-4B2F-87CF-B58E870ABE7C.jpegFB8DC3AD-A367-4A67-BE1E-A14AF220D65A.jpegFC3B7216-9E95-454E-954E-E6E01FF2ABB0.jpeg
Chopped about a pound and a half of colas, maybe more off the ones at the front before this photo.
70B1EF07-E24D-4B9B-9FAC-FFBFF7D22388.jpeg
loving coco atm. Less equipment to run and clean at the end of a run. Gives nearly as good results as dwc if done right too.
I feel you can monitor things a lot better in dwc but coco is more simpler :cool:
Have you grown in coco before shiva??
 

shiva71

Well-Known Member
Blimey o'reilly grow some weed why dont ya? Impressive stuff man. They look like sativa leaning strains...? Gorgeous plants!
No never grown in coco, my mate does and he swears by it. Im only ever gonna be a one plant in a tent guy so dwc is perfect.
 
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