Matching ppms to umols?

[Southernontariogrower]

My girl is running this cycle solo
Thug pug genetics
15gal cloth pot wrapped in poly leaving top and bottom with a few inches.
Wrapped when brought in, figured more room to root and conserve water and nutes
My light rated 1480 umols at hight of 1 ft, sphere tested 600w
Growing indoors then outdoors for 40 days
June 24th brought in and ran under leds 24x7
Half power or less at first then slowly increased
Flipped July 1st
First full strength feed made 5 gal bucket
Fed about 3g today
No runoff to speak of
Ppms were at 1550 approx.
pm is proliferating in my zone
Found a few spots today and removed fin.
But question is should nutes match light?
Guess my vpd is shot to shit
Temps been in 80s
Rh has been in 50s low 60s and is highest lve seen this grow but with all the water in there l understand
Rh *68 atm and temps lowest during lights on at 78.6f

My question again should light output match feed input?

 

[Tracker]

My girl is running this cycle solo
Thug pug genetics
15gal cloth pot wrapped in poly leaving top and bottom with a few inches.
Wrapped when brought in, figured more room to root and conserve water and nutes
My light rated 1480 umols at hight of 1 ft, sphere tested 600w
Growing indoors then outdoors for 40 days
June 24th brought in and ran under leds 24x7
Half power or less at first then slowly increased
Flipped July 1st
First full strength feed made 5 gal bucket
Fed about 3g today
No runoff to speak of
Ppms were at 1550 approx.
pm is proliferating in my zone
Found a few spots today and removed fin.
But question is should nutes match light?View attachment 4960553
Guess my vpd is shot to shit
Temps been in 80s
Rh has been in 50s low 60s and is highest lve seen this grow but with all the water in there l understand
Rh *68 atm and temps lowest during lights on at 78.6f

My question again should light output match feed input?

At an ideal temp, pH, and RH, the amount of nutrient ppm's the plant can make use of depends on the photons and on the CO2.

6H2O + 6CO2 ----> add photons ----> C6H12O6 + 6O2

That is photosynthesis. To drive the photosynthesis more you need more CO2 and photons. The other nutrients you add make building blocks of new plant material, hormones, etc.... to support this activity.

At least that's what I learned after a bunch of Dr. Bruce Bugbee videos.

So the answer to the question is that there is a balance between light intensity, nutrient uptake, and CO2.

 

[NorthernHuntingMom]

Bugbee is really good. A few of his comments about light rrally stick out.
Cannabis can handle a LOT of light, even as seedlings. The amount of light will govern the amount of every other vital component but it is important to remember that cannabis is as thirsty as it is light loving. It is easy to create an imbalance of nutrients with high light conditions. Cannabis drinks so much water that it is easy to over feed. I know that I will try to underfeed any time I notice a stressed plant.

How many here take a soil sample to their local county agriculture office for a soil analysis?

 

[Southernontariogrower]

At an ideal temp, pH, and RH, the amount of nutrient ppm's the plant can make use of depends on the photons and on the CO2.

6H2O + 6CO2 ----> add photons ----> C6H12O6 + 6O2

That is photosynthesis. To drive the photosynthesis more you need more CO2 and photons. The other nutrients you add make building blocks of new plant material, hormones, etc.... to support this activity.

At least that's what I learned after a bunch of Dr. Bruce Bugbee videos.

So the answer to the question is that there is a balance between light intensity, nutrient uptake, and CO2.

Thanks for comment, DrB is awesome l agree.

 

[Southernontariogrower]

Bugbee is really good. A few of his comments about light rrally stick out.
Cannabis can handle a LOT of light, even as seedlings. The amount of light will govern the amount of every other vital component but it is important to remember that cannabis is as thirsty as it is light loving. It is easy to create an imbalance of nutrients with high light conditions. Cannabis drinks so much water that it is easy to over feed. I know that I will try to underfeed any time I notice a stressed plant.

How many here take a soil sample to their local county agriculture office for a soil analysis?

I grow in peat base and not in ground, no to soil sample and am small grow. I feed at around 7 to 8 hundred ppm until plants get big enough to handle more. Some never do. This is only 3rd run in flower with led and veg just got leds recently. Trying to best spectrum over more wattage. Usually run homebrew co2 in flower but temps are 88.5 and rh is 65% without closed system, cant do co2 as will raise rh too much for environment, was 80 to 85rh in close tent with co2, mind they grew huge and no pm. Cant do this run.

 

[Southernontariogrower]

From all the videos, seminars and anything plant related, tree related, fungus, bacteria etc if l could set up a matched grow between light co2 and nutes l would aim for the 1500 mark. What do you think? Could this make good simplified base for people to start from? Temp and rh important but not using as trying to find a ground base for people starting up.

 

[Rocket Soul]

When you add CO2 you need to add a bit more heat and your vpd may get a bit wacked up as far as transpiration: CO2 tend to close the stomata and decrease transpiration. This can be fixed by adjusting your vpd or by adding a little blue, preferably somewhere around 420-430nm.
You'll also need the extra heat for higher metabolism. Your plants, some have burnt tips so they don't look like they're using all the feed your giving.

 

[Southernontariogrower]

When you add CO2 you need to add a bit more heat and your vpd may get a bit wacked up as far as transpiration: CO2 tend to close the stomata and decrease transpiration. This can be fixed by adjusting your vpd or by adding a little blue, preferably somewhere around 420-430nm.
You'll also need the extra heat for higher metabolism. Your plants, some have burnt tips so they don't look like they're using all the feed your giving.

Yes last feed did burn tips, l take it as a signe back up a bit. If had co2 wouldnt be issue, at least l dont think so. Using tap water so cut calmag out of regiment, fed with last feed to raise ppm. Wont feed again from this time on. Ppm will be under 1000

 

[Rocket Soul]

It's hard to say about CO2, at least from a theoretical standpoint. Is your grow sealed? Would you be able to measure how much CO2 rise over night? This would give some important info. Big rise and increasing from one day to another means the plant is working harder every day and you don't have too little CO2. But since it also closes the stomata the transpiration might be suffering, no drinking no growing. Don't go overboard on CO2, we had our veg super fucked slow and shitty by burning to much gas. If you plan on heavy duty CO2 then make sure you have good control over temps and rh independently from each other or even better some blue light on tap.

We couldn't compensate with environment or spectrum in our veg and the growth was shit.

 

[Southernontariogrower]

It's hard to say about CO2, at least from a theoretical standpoint. Is your grow sealed? Would you be able to measure how much CO2 rise over night? This would give some important info. Big rise and increasing from one day to another means the plant is working harder every day and you don't have too little CO2. But since it also closes the stomata the transpiration might be suffering, no drinking no growing. Don't go overboard on CO2, we had our veg super fucked slow and shitty by burning to much gas. If you plan on heavy duty CO2 then make sure you have good control over temps and rh independently from each other or even better some blue light on tap.

We couldn't compensate with environment or spectrum in our veg and the growth was shit.

Just running ambient now and no way to check levels of co2, was winging it and did well.