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Thread: Think I'm shit at growing in nft...

  1. #1

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    Default Think I'm shit at growing in nft...

    Alright lads started a grow diary nearly 8 weeks ago not been about to update cuz f**k has happened lol not sure what I'm doing wrong with nft done a few different hydro grows over the years and it's been ok. I let the blocks root well before putting them in the system, at the start I put the timer on every 2 hours for 15 mins because the blocks was getting soking wet but had hardly any growth in 7 weeks...

    The systems are level but obviously the tray inside does have a slope to it, the pumps now run 24/7 because I read that's best... I even got golf T's and put them under the blocks because they was just soking wet all the time. The plants closest the pump in both trays look the strongest with most root growth. Any ideas on what I'm doing wrong?


    First pic is the roots before they went into the system...

    Cheers

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  3. #2

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    Any nft growers out there had similar problems?


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    Wish I could help thegrower1, but have no clue about NFT growing...hope someone who has experience pops in for you

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    The root development looks very stunted and they look like they have been droughted.

    I don't grow NFT, but grow coco drain to waste. So can only gauge on what I can see.

    I think I would start again. Were you top feeding at the beginning?

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    Quote Originally Posted by Jumper114 View Post
    The root development looks very stunted and they look like they have been droughted.

    I don't grow NFT, but grow coco drain to waste. So can only gauge on what I can see.

    I think I would start again. Were you top feeding at the beginning?
    Top fed before they went Into the system mate then they had plenty of roots to go straight into the system, well so I thought anyway been reading on some other forums I'll try lifting the tray to make the water flow a little faster because it is pooling and one end. I think the blocks have just been to wet to start with, I've tried to get the blocks a few mm above the water flow so I'll give them a week let the blocks dry out a little and see how they go if not I'll put it down as 8 weeks wasted and start again lol

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    Hello mate, I'll be able to help you out a bit here with some more info on the grow. From how they look, my first question is do you have any extraction?

    I'll also need to know your temps and humidity levels in the grow-space, your ec and ph levels, what you are feeding them and also your res temps.

    Once I have this information we will see what's what.

    First tip is use the plastic spacers from pizza boxes to support the blocks above the water. They work much better than anything else I have tried.
    Last edited by ladymaryjane; 06-09-19 at 12:43 PM.

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    Quote Originally Posted by ladymaryjane View Post
    Hello mate, I'll be able to help you out a bit here with some more info on the grow. From how they look, my first question is do you have any extraction?

    I'll also need to know your temps and humidity levels in the grow-space, your ec and ph levels, what you are feeding them and also your res temps.

    Once I have this information we will see what's what.

    First tip is use the plastic spacers from pizza boxes to support the blocks above the water. They work much better than anything else I have tried.
    Hi ladymaryjane, I’ve grown hydro for about 3 years now so I know to keep on top of the ec and ph levels because they can change from day to day...I’ve always run a water cooler so water temps are always around 18oC.

    It’s a loft groom so unfortunately even with a 12” fan taking out and a 10” bringing fresh air in when you’re dragging 25-30oC air in some days the temps are all over the place especially with the heat from the lights as well, so room temps swing from 20-35oC and it’s done this since I’ve been in the loft for nearly 10 years now and never had plants grow this slow lol

    I’m pretty sure this is down to the plants being drowned with the blocks being too wet, next time I’ll make sure there even more rooted then this time and also I won’t put the pumps on 24/7 for the first 2 weeks and hopefully they’ll be a little happier next time


    Current grow...

    6 Invisible sun LED boards NFT grow
    https://r.tapatalk.com/shareLink?sha...0&share_type=t

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    Hiya buddy im an NFT grower. Profile pic is an auto i done that way.
    The first thing absolutely screaming at me is in picture no3. You want like 30litres per hour flowing out of that manifold. I could almost surf that wave lol.

    Second is that your plants are dying from the bottom up.with spattered dead patches., that sadly means the roots are knackered IMO. The tops will stay alive the longest. They may even recover but its a coin toss to be honest.
    If you look at the pic of just the rockwool you can see the plant is already dying off and that theres brown stuff growing in the roots.
    Was doomed from the start i reckon .

    Few questions to help me understand and advise though...
    how often do you empty and clean the res?
    Are you using a product to keep the res healthy? Hydroguard z7,sm-90 etc?
    are you using an airpump?
    What ppm feed do you put in and at what ph?
    Do the ppm and ph numbers rise or fall?

    In all honesty i think youre screwed mate and would be better starting again but answer that lot anyway.
    Ill set you back on track if its doable and make sure it doesnt happen again.
    Youll know very shortly if its salvageable


    In the thread under my name, im about to share as much as i can about the subject. Wont be kicking off for another week or so but tag in mate . Ill help you get it right next time

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    Quote Originally Posted by thegrower1 View Post
    Hi ladymaryjane, I’ve grown hydro for about 3 years now so I know to keep on top of the ec and ph levels because they can change from day to day...I’ve always run a water cooler so water temps are always around 18oC.

    It’s a loft groom so unfortunately even with a 12” fan taking out and a 10” bringing fresh air in when you’re dragging 25-30oC air in some days the temps are all over the place especially with the heat from the lights as well, so room temps swing from 20-35oC and it’s done this since I’ve been in the loft for nearly 10 years now and never had plants grow this slow lol

    I’m pretty sure this is down to the plants being drowned with the blocks being too wet, next time I’ll make sure there even more rooted then this time and also I won’t put the pumps on 24/7 for the first 2 weeks and hopefully they’ll be a little happier next time


    Current grow...

    6 Invisible sun LED boards NFT grow
    https://r.tapatalk.com/shareLink?sha...0&share_type=t
    Hello again mate, from what you have said, I think you're bang on with your analysis. A combination of almost drowning along with room temps getting too high.

    Now, if you use the spacer from a pizza box, circle side down, placing the block around 1cm above the surface of the tray, you will avoid saturating the block when it's first added to the tank in future. Make sure it is almost dry, only damp when you put it in.

    The roots will find the water mate, they do not have to sit on the mat. And there is enough water already in the block to keep it going until the roots hit the tray.

    Now, as for the pump, instead of turning it on and off etc.....it would be better to leave it running 24/7, but turn the flow of the water down until your root-mat is established.

    But keep the water moving at all times.

    I'm not really a fan of letting it sit still too long, as it could go stagnant.

    With nft, you are looking to get as thin a film of water as possible at first, not a raging torrent, until they are ready to kick off, meaning plenty of roots, then turn your pump back up.

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    Quote Originally Posted by EvilScotsm@n View Post
    Hiya buddy im an NFT grower. Profile pic is an auto i done that way.
    The first thing absolutely screaming at me is in picture no3. You want like 30litres per hour flowing out of that manifold. I could almost surf that wave lol.

    Second is that your plants are dying from the bottom up.with spattered dead patches., that sadly means the roots are knackered IMO. The tops will stay alive the longest. They may even recover but its a coin toss to be honest.
    If you look at the pic of just the rockwool you can see the plant is already dying off and that theres brown stuff growing in the roots.
    Was doomed from the start i reckon .

    Few questions to help me understand and advise though...
    how often do you empty and clean the res?
    Are you using a product to keep the res healthy? Hydroguard z7,sm-90 etc?
    are you using an airpump?
    What ppm feed do you put in and at what ph?
    Do the ppm and ph numbers rise or fall?

    In all honesty i think youre screwed mate and would be better starting again but answer that lot anyway.
    Ill set you back on track if its doable and make sure it doesnt happen again.
    Youll know very shortly if its salvageable


    In the thread under my name, im about to share as much as i can about the subject. Wont be kicking off for another week or so but tag in mate . Ill help you get it right next time
    Thanks for the reply mate! I'm using the pumps that come with the nft 604 system so are them pumps not big enough?

    I change res every 7-10 days, I don't use anything to keep it a sterile system I tried once in rdwc and I didnt get as much root mass as I did when using voodoo juice and tnc mycorr (mycorr does strain roots brown) so this is why my roots have always been slightly brown when growing in any hyrdo system... Also pH to around 6 and let it swing, normally I find in beg it swings down and in flower it swings up, this is the case now.

    Appreciate all your help looks like these will be going in the bin, can't get hold of any decent cuts just yet so I'll leave them in for the time being tho

    Sent from my CLT-L09 using Tapatalk

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  21. #11

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    Quote Originally Posted by ladymaryjane View Post
    Hello again mate, from what you have said, I think you're bang on with your analysis. A combination of almost drowning along with room temps getting too high.

    Now, if you use the spacer from a pizza box, circle side down, placing the block around 1cm above the surface of the tray, you will avoid saturating the block when it's first added to the tank in future. Make sure it is almost dry, only damp when you put it in.

    The roots will find the water mate, they do not have to sit on the mat. And there is enough water already in the block to keep it going until the roots hit the tray.

    Now, as for the pump, instead of turning it on and off etc.....it would be better to leave it running 24/7, but turn the flow of the water down until your root-mat is established.

    But keep the water moving at all times.

    I'm not really a fan of letting it sit still too long, as it could go stagnant.

    With nft, you are looking to get as thin a film of water as possible at first, not a raging torrent, until they are ready to kick off, meaning plenty of roots, then turn your pump back up.
    Good tip on the pizza box spacer, thanks for the other tips as well I will carry these on to the next grow

    Sent from my CLT-L09 using Tapatalk

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  23. #12

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    Quote Originally Posted by EvilScotsm@n View Post
    Hiya buddy im an NFT grower. Profile pic is an auto i done that way.
    The first thing absolutely screaming at me is in picture no3. You want like 30litres per hour flowing out of that manifold. I could almost surf that wave lol.

    Second is that your plants are dying from the bottom up.with spattered dead patches., that sadly means the roots are knackered IMO. The tops will stay alive the longest. They may even recover but its a coin toss to be honest.
    If you look at the pic of just the rockwool you can see the plant is already dying off and that theres brown stuff growing in the roots.
    Was doomed from the start i reckon .

    Few questions to help me understand and advise though...
    how often do you empty and clean the res?
    Are you using a product to keep the res healthy? Hydroguard z7,sm-90 etc?
    are you using an airpump?
    What ppm feed do you put in and at what ph?
    Do the ppm and ph numbers rise or fall?

    In all honesty i think youre screwed mate and would be better starting again but answer that lot anyway.
    Ill set you back on track if its doable and make sure it doesnt happen again.
    Youll know very shortly if its salvageable


    In the thread under my name, im about to share as much as i can about the subject. Wont be kicking off for another week or so but tag in mate . Ill help you get it right next time
    Oh yep I always run a air stone in each tray as well mate

    Sent from my CLT-L09 using Tapatalk

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  25. #13

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    Quote Originally Posted by thegrower1 View Post
    Thanks for the reply mate! I'm using the pumps that come with the nft 604 system so are them pumps not big enough?

    I change res every 7-10 days, I don't use anything to keep it a sterile system I tried once in rdwc and I didnt get as much root mass as I did when using voodoo juice and tnc mycorr (mycorr does strain roots brown) so this is why my roots have always been slightly brown when growing in any hyrdo system... Also pH to around 6 and let it swing, normally I find in beg it swings down and in flower it swings up, this is the case now.

    Appreciate all your help looks like these will be going in the bin, can't get hold of any decent cuts just yet so I'll leave them in for the time being tho

    Sent from my CLT-L09 using Tapatalk
    Hello again mate. After reading this, I've spotted something else you need to consider. You also have a problem with your Ph!

    Don't set it to 6.0, set it to 5.5-5.6 and then you should let it drift up to 6.2-6.3 and then take it back to 5.5-5.6 etc.... This allows maximum uptake of all nutrients. If they have not been below 6.0 throughout the grow they will not have taken up calcium and magnesium in sufficient quantities.

    As for the ec, set it 0.2 above your background to start, then watch the plants and only raise it, again by 0.2 if the leaves start to go pale. If they go darker, back off the feed by 0.1. But the ph is the most important factor, along with the growing environment of course.

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    Yeah pw is right mate, that was why I asked about the pH. Should go up in veg then down in bloom. If it's not then your ppm is too high so must be rising.
    You want the ppm to always be dropping just a little. That keeps the pH in range for the longest possible time.
    If you can keep the ppm right you shouldn't ever need to adjust the pH out with top ups or Res change day.
    Sweet spot for that size will be about 300ppm or 0.6ec plus your water.

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    Sorry for the late reply I ended up giving up on them just waiting to get some new clones and I'll try again

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    I've got some clones coming in the next 2 weeks, when I do get them what's the best way of starting them off in the nft and getting them to grow away happily, please answer any questions below...

    In the photo that's how much I rooted them before putting them into the system, is this ok or do they need more roots?

    Once I put them into the system do I run the pump 24/7 straight away?

    I'm using the standard 1000 pump that comes with the 604 systems, is this pump big enough?

    The trays have a factory set slope is this OK or do I need to slope the trays more?

    Thanks for any help and advice I appreciate it!

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  33. #17

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    If possible at the points on the trays where you place the cubes. Build some clay pebble mounds. Then run the system and add or remove from the mounds so you can see moisture but you can tell the cubes aren't going too get soaked.
    Keep the water running to wash any residue off the pebbles.
    Clean and set ya res up . Personally I'd just feed them rhizo until the roots are established at 0.2 above base and ph of 5.8 .
    Have a timer running the pump 15mins on 15mins off .
    Once you have seen the ec dropping and you know the roots are established start feeding them.

    You need the roots to go looking for that water and if the cubes get too wet they don't kneed too . Although they have to remain moist.

    You'll find two of the above members are now banned


    in a green and pleasant land

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    Quote Originally Posted by British green View Post
    If possible at the points on the trays where you place the cubes. Build some clay pebble mounds. Then run the system and add or remove from the mounds so you can see moisture but you can tell the cubes aren't going too get soaked.
    Keep the water running to wash any residue off the pebbles.
    Clean and set ya res up . Personally I'd just feed them rhizo until the roots are established at 0.2 above base and ph of 5.8 .
    Have a timer running the pump 15mins on 15mins off .
    Once you have seen the ec dropping and you know the roots are established start feeding them.

    You need the roots to go looking for that water and if the cubes get too wet they don't kneed too . Although they have to remain moist.

    You'll find two of the above members are now banned


    in a green and pleasant land
    Cheers mate thanks for the tips on the clay pebbles I'll do that

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