Cannabis leaf tips brown and yellow

Hi guys hope everyone is well. So i am on day 35 of my indoor grow my 6 fem photo period strains are x3 og kush and x3 white widow. I transplanted them about 4 days ago in to there final 15 liter pots i have been feeding them with my flora grow three part solution i started feeding them about two weeks ago and i am feeding every other watering i started them off on a low dose with the ec being 0.9 and have been bringing it up as i go along the last feed the ec was 1.38 my room temp is beetween 25.5c to 27.5c and my rh is beetween 62% to 70% and my ph is always beetween 6.2 and 6.5 and my led lights were 14 inches from them but today i moved them to 18 inches from them just incase its light burn or stress my led grow lights are running with both the veg and bloom switch on i have been low stress training them a little so they are more flat and bushy than tall i have notised they have seemed to be growing a little slower since transplanting and i thought maybe thats from when i transplanted them due to stress but now i have notised some of the leaf tips to be yellow and one of my leafs had a yellow tip that is now brown and that same leaf with the brown tip has a very faded yellowness to the whole leaf like its green but with very faded yellow starting to apear on the main top of the leaf. Anyone have any idea what this could be i dont think its nutrient burn my idea is maybe it wants more feed and is showing a little potasium defficancy but i could be wrong thats why i am hoping you lovely people can help. Here are a couple photos please reply. Thank you

Is your soil hot or does all your nutrients come from feeding you pour in?

ProPheT 216 said:

Is your soil hot or does all your nutrients come from feeding you pour in?

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I cant say if the soil is hot or not i have no means of checking it but tbh i dont think its hot and i pour my nutrients on the top of the soil

rastamouse420 said:

... my ph is always beetween 6.2 and 6.5 ...

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And what medium are you growing in?

They look like they’re showing some heat/light stress imo esp in the 1st pic

So u need to do a few things to get an answer. Put a thermostat at the top of the plant and see how hot it is at canopy level. Could be heat but I don't think so cuz the ridges of the leafs would turn up. Looks like nitrogen lock out to me honestly. They are fading in color. Some type of lockout probably. Another thing I would do is test my ph of soil by doing a slurry test. 1 ml of distiled water for every gram of soil. Test with meter. See what your ph really is. Left over nutrients turn to salts that play with ph values. You may wanna run 2x as much water thru your pots as they hold in dirt and start with some fresh soil if your soil ph is high or low

StareCase said:

And what medium are you growing in?

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StareCase said:

And what medium are you growing in?

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I am growing in soil in a plastic 15lt pot

bam0813 said:

They look like they’re showing some heat/light stress imo esp in the 1st pic

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Thats why i raised the lights from 14 inches to 18 inches

ProPheT 216 said:

So u need to do a few things to get an answer. Put a thermostat at the top of the plant and see how hot it is at canopy level. Could be heat but I don't think so cuz the ridges of the leafs would turn up. Looks like nitrogen lock out to me honestly. They are fading in color. Some type of lockout probably. Another thing I would do is test my ph of soil by doing a slurry test. 1 ml of distiled water for every gram of soil. Test with meter. See what your ph really is. Left over nutrients turn to salts that play with ph values. You may wanna run 2x as much water thru your pots as they hold in dirt and start with some fresh soil if your soil ph is high or low

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Ok thanks mate i gusse you know more than me but i dont think its nutrient lock out as i have only fed them 3 times so far and low doses and the ph is always correct also maybe im not giving enough water when i water i am giving them 1lt and dont ever get any run off on the bottom i will test the soil tonight

rastamouse420 said:

Ok thanks mate i gusse you know more than me but i dont think its nutrient lock out as i have only fed them 3 times so far and low doses and the ph is always correct maybe im not giving enough water when i water i am giving them 1lt and dont ever get any run off on the bottom

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Well there is a huge issue. No run off is not ok. You have to let the plant piss basicly to let waste out the soil. You probably do have salt build up and lock out going on. U wanna see a third of what u put in run off each feed boss

ProPheT 216 said:

Well there is a huge issue. No run off is not ok. You have to let the plant piss basicly to let waste out the soil. You probably do have salt build up and lock out going on. U wanna see a third of what u put in run off each feed boss

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Ok mate so how many lt of water do you think i should pour in to a 15lt sized pot per plant

Letting your soild dry all the way out in spots is making hard pockets where roots won't grow and where water and nutrients won't absorb when u feed. Don't let your soil get rock hard and dry and make sure u see run off.

rastamouse420 said:

Ok mate so how many lt of water do you think i should pour in to a 15lt sized pot per plant

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If you can put in 1 gal and get ⅓ gal back your good. U just wanna see about ⅓ in run off

ProPheT 216 said:

Letting your soild dry all the way out in spots is making hard pockets where roots won't grow and where water and nutrients won't absorb when u feed. Don't let your soil get rock hard and dry and make sure u see run off.

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Thanks mate i watered yesterday but had no run off do you think i should water again now and make sure i see run off or wait until i would normaly water them and give more then ?

rastamouse420 said:

... I am growing in soil in a plastic 15lt pot ...

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A pH of 6.5 is OK but 6.2 is too low for a soil grow. A pH of 6.2 would be good for a peat based mix. I recommend a pH of between 6.5 and 6.7 for soil.

rastamouse420 said:

... how many lt of water do you think i should pour in to a 15lt sized pot per plant ...

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For a 19L pot I will give them 4.5 litres every 4th day and I will get a little run off in the collection tray.

StareCase said:

A pH of 6.5 is OK but 6.2 is too low for a soil grow. A pH of 6.2 would be good for a peat based mix. I recommend a pH of between 6.5 and 6.7 for soil.

For a 19L pot I will give them 4.5 litres every 4th day and I will get a little run off in the collection tray.

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So what would you say for a 15lt pot ?

Water with just ph adjusted water today. Lots of it. Like 3 or 4 gallons for a 15 lt pot. Then test soil ph tonight. Let soil dry out over night and feed tomorrow like normal till u see run off and you get back about a third or half of what you put in.

The only water for a day won't hurt them and it might make food more available if ph or ppm ec is high

rastamouse420 said:

... So what would you say i give for a 15lt pot ...

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... performs math operations ... carry the one ... square root of 5 ... ends math operations ...

Start with 3.5L and see if you get any run off. If not, increase to 4L.

ProPheT 216 said:

Water with just ph adjusted water today. Lots of it. Like 3 or 4 gallons for a 15 lt pot. Then test soil ph tonight. Let soil dry out over night and feed tomorrow like normal till u see run off and you get back about a third or half of what you put in.

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Mate are you for real you want me to flood my plant with 3 or 4 gallons of water thats like 25 to 30 lt of water and then feed it again tomorrow clearly your just trying to have a joke with me im not that dumb but thanks id rather not kill my plants