What to do if you have light stress in week 5 of bloom?

[Adi1989]

in future Ill make sure theres more runnoff and to check the runoff ppms every time I feed

 

[Adi1989]

That was week 5? Week 5-7 I do 75* 55% day

night 68* 45%

Day 1.33
Night 1.28

Isnt 75 degrees a bit low? Do you get more healthy plants at 75 degrees? Less stressed?
Ive been told 79 is optional for growth rate

 

[Drug Dealer #1]

Isnt 75 degrees a bit low? Do you get more healthy plants at 75 degrees? Less stressed?
Ive been told 79 is optional for growth rate

that’s week 5-7

it depends on growth stage and how I am steering the plants.
veg 78. 64%
flower week 1-3. 78 64
Although this last room I’m trying a dif.. I noted the night time temp. Usually I want 78.. but it was 75.. so for a dif the first 3 weeks I have been running 5 degrees cooler than the evening temp for the first 3 hours in the morning. In an attempt to slow stretch by 30%.. seems to be working.
I slowly drop the temp and run different day night temp hum settings. I haven’t memorized the sheet I go off of. But I won’t be running 78 degrees weeks 8,9 that’s for sure. I can take the time to give my settings and the different VWC for watering depending on plant stage if wanted.

 

[speedwell68]

Outside there more airflow, and the clouds shield the direct light from the plants
The light intensity drops on a Cloudy day.

Where I live it can be raining and really sunny at the same time, it is how Rainbows appear. Go to somewhere like Florida, it can rain so hard it hurts when it hits you and within 10 minutes it will be so sunny it causes the ground to steam. By you reasoning all of the plants would be burnt and crispy, yet the are verdant and lush. Go figure.

The concept that you can't water your plants or mist them in direct sun light is a total myth, bro-science if you will. My wife believes this old wives tale, which is why the soil in her veg planters always goes Hydrophobic and her plants suffer, she fails to water when they need it the most because she believes everything she reads on the internet, regardless of common sense or the source of it. Tells me I don't know what I am talking about.

You have posted a screen dump from a Cannabis website. All it proves is stoners will believe any old shit. Find me an article from a proper horticultural body, such as the RHS that suggests the same.

I'll save you the bother...

Watering / RHS

<p>Watering is key to growing plants well, so here we look at how to get it just right. This not only means providing the water our gardens need, but using it wisely.</p>

www.rhs.org.uk

 

[bk78]

Where I live it can be raining and really sunny at the same time, it is how Rainbows appear. Go to somewhere like Florida, it can rain so hard it hurts when it hits you and within 10 minutes it will be so sunny it causes the ground to steam. By you reasoning all of the plants would be burnt and crispy, yet the are verdant and lush. Go figure.

The concept that you can't water your plants or mist them in direct sun light is a total myth, bro-science if you will. My wife believes this old wives tale, which is why the soil in her veg planters always goes Hydrophobic and her plants suffer, she fails to water when they need it the most because she believes everything she reads on the internet, regardless of common sense or the source of it. Tells me I don't know what I am talking about.

You have posted a screen dump from a Cannabis website. All it proves is stoners will believe any old shit. Find me an article from a proper horticultural body, such as the RHS that suggests the same.

I'll save you the bother...

Watering / RHS

<p>Watering is key to growing plants well, so here we look at how to get it just right. This not only means providing the water our gardens need, but using it wisely.</p>

www.rhs.org.uk

He’s a 20 year veteran grower and knows his shit bro.

 

[Adi1989]

that’s week 5-7

it depends on growth stage and how I am steering the plants.
veg 78. 64%
flower week 1-3. 78 64
Although this last room I’m trying a dif.. I noted the night time temp. Usually I want 78.. but it was 75.. so for a dif the first 3 weeks I have been running 5 degrees cooler than the evening temp for the first 3 hours in the morning. In an attempt to slow stretch by 30%.. seems to be working.
I slowly drop the temp and run different day night temp hum settings. I haven’t memorized the sheet I go off of. But I won’t be running 78 degrees weeks 8,9 that’s for sure. I can take the time to give my settings and the different VWC for watering depending on plant stage if wanted.

Do you find if the nodes are too close together it can effect your yeild or cause problems? mine are literally on top of each other like literally no gaps.
I guess it might be bad for pathogens and mould…
Id recommend to try 4000k if you want super tightnodes

 

[Drug Dealer #1]

Do you find if the nodes are too close together it can effect your yeild or cause problems? mine are literally on top of each other like literally no gaps.
I guess it might be bad for pathogens and mould…
Id recommend to try 4000k if you want super tightnodes

What do you mean 4000k? My problem is I veg a little too long. I have huge ceilings and the strains I get are all the tall lanky fuckers. Tons of inter model spacing. Some of the strains not as bad. I just don’t like to see 2 ft of lolipopped stem and a canopy sitting above that. I might knock a week off of my veg time and try a couple different silica foliar that can either increase or decrease stretch. Im also playing around with new temp differentials to see what that does. So far a lower temp from evening for the first three hours lights on has definitely brought the node spacing closer together.

 

[Richard Drysift]

You were right it was salt build up, I found out yesterday they needed a drink, I kept feeding 1000ppm until the runoff hit 1100/1200ppm
I found out before I saw your post, do you think it would have been better to give straight water?

i did feed each pot about 10 gallons / 50L maybe a bit more for some of them where the ppmrunoff was high, I kept the feed to 1000ppmthough

Yes…adding more dissolved salts probably won’t help reduce salt buildup. Water as normal for a week or so avoiding runoff. 1k ppms in a soil pot is overkill.

 

[twentyeight.threefive]

What do you mean 4000k? My problem is I veg a little too long. I have huge ceilings and the strains I get are all the tall lanky fuckers. Tons of inter model spacing. Some of the strains not as bad. I just don’t like to see 2 ft of lolipopped stem and a canopy sitting above that. I might knock a week off of my veg time and try a couple different silica foliar that can either increase or decrease stretch. Im also playing around with new temp differentials to see what that does. So far a lower temp from evening for the first three hours lights on has definitely brought the node spacing closer together.

4000K temperature light.

 

[Richard Drysift]

in future Ill make sure theres more runnoff and to check the runoff ppms every time I feed

Unnecessary; just water as normal. Runoff tells you nothing useful

 

[Adi1989]

What do you mean 4000k? My problem is I veg a little too long. I have huge ceilings and the strains I get are all the tall lanky fuckers. Tons of inter model spacing. Some of the strains not as bad. I just don’t like to see 2 ft of lolipopped stem and a canopy sitting above that. I might knock a week off of my veg time and try a couple different silica foliar that can either increase or decrease stretch. Im also playing around with new temp differentials to see what that does. So far a lower temp from evening for the first three hours lights on has definitely brought the node spacing closer together.

You probably use 3000k in veg I assume

 

[Markshomegrown]

You probably use 3000k in veg I assume

I don't think 2000k vs 4000k makes any real difference, its down to the environment and the plants getting enough light, I have vegged plants under a HPS(2000k), there short and stocky, no problem, sure there are loads of growers that still do this.

 

[PJ Diaz]

I don't think 2000k vs 4000k makes any real difference, its down to the environment and the plants getting enough light, I have vegged plants under a HPS(2000k), there short and stocky, no problem, sure there are loads of growers that still do this.

Sue you can veg with hps fine, but the plants will end up a bit taller and less compact compared to mh in veg. To think that color temperature doesn't affect the plant's morphology is ignorance.

 

[Markshomegrown]

Sue you can veg with hps fine, but the plants will end up a bit taller and less compact compared to mh in veg. To think that color temperature doesn't affect the plant's morphology is ignorance.

I have read this endless times on the net, but 50% of your growth/stretch is in the first 3 weeks in flower.
You can look at endless grow diary's on here, some HPS and some LEDS, on average the plants grown under HPS are no more stretched than the ones grown under LEDS, I had a HPS over half my plants one end and LEDS the other end, the hole canopy stayed level it made no difference.

 

[PJ Diaz]

I have read this endless times on the net, but 50% of your growth/stretch is in the first 3 weeks in flower.
You can look at endless grow diary's on here, some HPS and some LEDS, on average the plants grown under HPS are no more stretched than the ones grown under LEDS, I had a HPS over half my plants one end and LEDS the other end, the hole canopy stayed level it made no difference.

You can trust "the net" if you like. I'll trust academic research myself.

 

[Markshomegrown]

You can trust "the net" if you like. I'll trust academic research myself.

What about your own experience?
my experience is stretching is cause by genetics, lack of light or the environment.
Few years back I tried HPS vs MH and different in the stretch(first 3 weeks in flower), height was so small, its not worth thinking about(HPS crop size was larger), my point is, you can't say your plants are stretch because you used 4000k instead of 2000k.

 

[Lenin1917]

Anytime I vegged under or flipped to hps before the stretch was done my node spacing was stupid long. You really do get better results vegging under a bluer spectrum. I still like vegging under mh better than under my 3500k(ish) led

 

[Markshomegrown]

Anytime I vegged under or flipped to hps before the stretch was done my node spacing was stupid long. You really do get better results vegging under a bluer spectrum. I still like vegging under mh better than under my 3500k(ish) led

Guess I have always used HPS, I flower my plants off under the HPS , never notice the stretch/HPS causing large node spacing. This was one of the plants under my led bulbs just under 3000k (purple punch)


and my plant under the HPS (2000k)


In general my plants grow between 2-3 foot tall.
don't see how they can grow any different.

 

[Horselover fat]

I think light intensity has a lot to do with internodal length and spectrum plays a role too. I'm certain I get longer nodes if I dim down my leds.

 

[Markshomegrown]

I think light intensity has a lot to do with internodal length and spectrum plays a role too. I'm certain I get longer nodes if I dim down my leds.

I agree,
If the plants not receiving enough light but also big temperature swing night/day, stretchy plant (sativa genetics), and low airflow cause wide node spacing more than anything else.