Help a newbie save his plant :)

Hello everybody, it's my first post and I'm hoping that someone could help me .
Long story short my plant had a hard life. It started as an ecperimexp from a bagseed. Firstly it was grown outdoors without good fertilizer but was doing pretty well apart from a spider mites attack that I managed to deal with. It was transferred indoors on 16th of September when I spotted first pistils. The plant is in a garage inside a 2.2m X 2m X 1m mertal "grow room" I made. Because I'm on very low budget and don't want to waste money as this is an experiment I didn't buy fertilizer untill 28th of September. Before that I was using some tomato fertilizer. Now I'm using fox farm trio and the plant reacted very nicely to it.
I have several problems with the plant now .
- one of the branches never fully recovered after supercropping. The leaves have yellowish colour and cola isnti growing that well.
- I suspect phosphorus deficiency but since I started using fox farm it started going back to normal.
- last week I started noticing tips of new growth to change colour what looks like a nutritient burn. The problem is that it still has signs of deficiency. Is it possible to have nute burn while plant has deffociedefi?
- the branch that never fully recovered seems to be affected most.
- I also started noticing red/brown spots on couple leaves.
I am including pictures that I hope will help.
I really started lovinlthis plant and I don't want to loose it especially as it's 5th week of flowering. Any help will be extremely appreciated
Ps
I'm suing 170w LED lamp
The net is 70cm x 70cm

Back off the nutes to 1/2 strength for a bit. More light wouldn't hurt.
Do a little reading on ph for your growing medium.
Don't over analyze and relax she's been badly stressed, under the circumstances I'd say she looks pretty good.

Have fun

170w LED lamp is that the actual wattage or is that what it said on the box? Also as Hugo said back off the nutes, to 1/4-1/2 strength, but personally id go straight water for the next 7 days or so looks like nute burn.

I flushed it with 20l water last week does it affect nutrients amount I should use??

Hugo Phurst said:

Back off the nutes to 1/2 strength for a bit. More light wouldn't hurt.
Do a little reading on ph for your growing medium.
Don't over analyze and relax she's been badly stressed, under the circumstances I'd say she looks pretty good.

Have fun

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jonl92 said:

170w LED lamp is that the actual wattage or is that what it said on the box? Also as Hugo said back off the nutes, to 1/4-1/2 strength, but personally id go straight water for the next 7 days or so looks like nute burn.

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That's the actual wattage of the lamp.
I'm using 1/2 of what fox farm recommends every other watering. I'll do the straight water for next two waterings (watering usually every 5 days) and start with 1/4 recommend dose. Is that corecor?

patij212 said:

That's the actual wattage of the lamp.
I'm using 1/2 of what fox farm recommends every other watering. I'll do the straight water for next two waterings (watering usually every 5 days) and start with 1/4 recommend dose. Is that corecor?

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Most people do 1/4 - 1/2 of the recommended dose because it can causes nute burn and or nute lock up. Also i'd water every 3 days or if it looks dry water it. I have a mars hydro 300w and I water every 72 hours or so. I find they drink a lot in flower stage lol

jonl92 said:

Most people do 1/4 - 1/2 of the recommended dose because it can causes nute burn and or nute lock up. Also i'd water every 3 days or if it looks dry water it. I have a mars hydro 300w and I water every 72 hours or so. I find they drink a lot in flower stage lol

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I water my plant when top inch feels dry. I used to water it every seven days during vegetative using same method.i got mars hydro 600W it's a great lamp.

patij212 said:

I water my plant when top inch feels dry. I used to water it every seven days during vegetative using same method.i got mars hydro 600W it's a great lamp.

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every 7 days, how much water are you giving it?

jonl92 said:

every 7 days, how much water are you giving it?

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It's in 5l pot and it drinks 2.5l - 3l. When she was outside there was rain as well sometimes so I didn't need to water so often.

Does anybody know what I should do about the branch that haven't recovered after supercropping? I didn't break the skin and it seemed alright for some time but as other ones recovered quickly and started growing vigorously, this branch started to wilt. It eventually started growing but it's been two months now and leaves are yellowish and cola isn't developing as quick as other branches.

patij212 said:

Does anybody know what I should do about the branch that haven't recovered after supercropping? I didn't break the skin and it seemed alright for some time but as other ones recovered quickly and started growing vigorously, this branch started to wilt. It eventually started growing but it's been two months now and leaves are yellowish and cola isn't developing as quick as other branches.

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If its still developing you could leave it trim the yellow leaves, or just cut it and it will be one less branch the plant has to spend energy on.

Are you still overwatering?

Herb & Suds said:

Are you still overwatering?

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So you say that I may be overwatering them?

patij212 said:

So you say that I may be overwatering them?

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Under lit over watered ...Yup

jonl92 said:

If its still developing you could leave it trim the yellow leaves, or just cut it and it will be one less branch the plant has to spend energy on.

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Thanks for advice. I'm thinking about timing the yellowing leaves and waiting for a bit to see how it reacts.

Herb & Suds said:

Under lit over watered ...Yup

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Thanks, it is possible as all I know is from tutorials online and I don't have any experience. So what should I do now? What should be the distance from light? How should I change my watering schedule? Also I should note that I covered the lamp to take a pictures so condition of leaves is more visible.
This is how it looks in full light.
09.10.2018

patij212 said:

Thanks, it is possible as all I know is from tutorials online and I don't have any experience. So what should I do now? What should be the distance from light? How often should I change my watering schedule? Also I should note that I covered the lamp to take a pictures so condotico of leaves is more visible.
This is how it looks in full light.
09.10.2018View attachment 4218748

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I have no idea on cheap led's I grow for cash

Light should be around 12''-15'' away from plant, and you said you have a 5 gallon pot so 1.5L maybe every 3 days. This is what I do. I have a 3 gallon pot and I water 1-1.5L every 3 days. Above you said 20 liters that's way to much lol

also make sure all the bud sites are getting light, if big fan leaves are in the way cut them off.

jonl92 said:

Light should be around 12''-15'' away from plant, and you said you have a 5 gallon pot so 1.5L maybe every 3 days. This is what I do. I have a 3 gallon pot and I water 1-1.5L every 3 days. Above you said 20 liters that's way to much lol

also make sure all the bud sites are getting light, if big fan leaves are in the way cut them off.

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He said 2.5L every 7 days.


Edit: oh you must have meant flush, my bad.

jonl92 said:

Light should be around 12''-15'' away from plant, and you said you have a 5 gallon pot so 1.5L maybe every 3 days. This is what I do. I have a 3 gallon pot and I water 1-1.5L every 3 days. Above you said 20 liters that's way to much lol

also make sure all the bud sites are getting light, if big fan leaves are in the way cut them off.

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My light is at 22" now. I had it at 17" before but when I seen burnt tips I was afraid it was from light so I moved it higher. How do I know the light is too far away?
Ok I'll try 1,5l every 3 days. Hopefully this will helpy lady.
Ok, will do.