Grow Mediums Seymour's 'Think Different' subthread off-topic discussions

[Muddy]

Nice to finally know why LED grows are more prone to cal/mag deficiencies. Some of us who have been using LEDs for awhile have seen the need for additional cal/mag but assumed it was due to increased nute uptake due to the higher efficiency of the lights. Were the people at CANNA able to advise how far to increase the temperature?

astronomy, according to the CANNA guys in holland it is more of a temperature related thing, so that would mean coolish temperatures=reduced evaporation=cam/mag deficiency. I am guessing it would be the same for traditional and autofem. The Canna nutrient boys are looking at it, I willl let you all know if I hear more

 

[seymour-buds]

yeah cheers for the input and everyones feed back but my problem only has just started to happen on my last 2 grows

i was using a 1 watt panel for the majority of my last grows and i used the 3 watt gen-x for the last few weeks, never had a problem when it was just the 1 watt panel, obviously the upgrade to the 3 watt panel has made shit loads of difference

i checked over on my l.e.d suppliers website and it does actually state that the correct temp for photosythnesis is between 80 - 83 and i personally thought that was a bit high and may cause heat stress on the plants so ive always kept my temps below 80 , if what you are saying is correct then growing my plants at the higher temps should fix the problem, like i said guys new light new setup and new set of rules here

ive upped the temps in my grow room now and its sitting at 81 degrees

 

[seymour-buds]

here is a couple of my Mi5 pics to show the difference.the first 1 i cut the veg nutes off and used bloom nutes as soon as it started flowering good(week 5 or 6)the second 1 i started the veg nutes as soon as it sexed(2 or 3 weeks)then did 50/50 veg and bloom nutes as soon as it started to flower good(week 5 or 6)till i started to flush at about 8 and a half 9 weeks.chopped them both at about 10 and a half 11 weeks.i think it works so i will be continuing to do this.

not sure i agree with your theory because my pineapple express was switched over to bloom feed as soon as she sexed and she was chopped on 65 days

 

[mr.mcgregor]

seymours tent has been recognised by the national trust as "an area of outstanding natural beauty"

 

[seymour-buds]

ive just taken this from my l.e.d manufacturers website

Temperature is a major factor in determining the growth rate and productivity of your plants. Transpiration and photosynthetic rates increase as temperatures rise, eventually reaching a maximum level of productivity. This increase in transpiration (plant respiration) allows for higher CO2 uptake, and a faster growth rate. As temperatures reach the upper limits for your crop, the plants reach a break-even point where they will begin to use more energy for respiration than is being created by photosynthesis. When temperatures reach these extremes, growth can come to a halt. Each plant species has a minimum, optimum and maximum temperature at which they grow. Photosynthesis is performed optimally between 80-86°F for the plants you'll be growing, so you'll want to maintain your garden at this temperature range to ensure the fastest growth rates possible.

what do you guys reckon to that?

 

[seymour-buds]

seymours tent has been recognised by the national trust as "an area of outstanding natural beauty"

ill invite you round one day mate and you can sample some l.e.d grown goodness for yaself, if your lucky ill let you do a smoke report on this "think different" for me

 

[Trifid]

Temperature is a major factor in determining the growth rate and productivity of your plants. Transpiration and photosynthetic rates increase as temperatures rise, eventually reaching a maximum level of productivity. This increase in transpiration (plant respiration) allows for higher CO2 uptake, and a faster growth rate. As temperatures reach the upper limits for your crop, the plants reach a break-even point where they will begin to use more energy for respiration than is being created by photosynthesis. When temperatures reach these extremes, growth can come to a halt. Each plant species has a minimum, optimum and maximum temperature at which they grow. Photosynthesis is performed optimally between 80-86°F for the plants you'll be growing, so you'll want to maintain your garden at this temperature range to ensure the fastest growth rates possible.

what do you guys reckon to that?

At various stages in the vegetative cycle, C2 plants will actually liberate Co2 during elevated-transpiration - this can have the effect of raising the temprature of the grow space, depending on the ambient air flow exchange. In this way, plants selectively regulate the ambient temperature to optimize photsynthetic rates.

 

[Red eyed c]

I think saying all cannabis grows optimally between 80-86 degrees is bold,considering the wide varieties available and I'd imagine some landrace strains used to create some of today's strains flourish in the wild in temps hotter and colder than that.but as canna said colder temps do affect cal uptake so it's something to keep on the radar mate

 

[seymour-buds]

In some cases at particular stages in the vegiataive stage, plants will liberate greater amounts of Co2 during elevated-transpiration - this can have the effect of raising the temprature of the grow space, depending on the ambient air flow exchange. In this way, plants selectively regulate the ambient temperature to optimize photsynthetic rates

what about the flowering stage??

in order to keep the process of nutrients available and going around the plants system is it not advisable to keep the temps high in flower aswell, obviously im throwing everything i ever knew out the window here about growing plants and stepping into a whole new arena due to these lights

mainly its the light cycle that triggers plants into flower but why do we need to lower the temps also?

 

[Trifid]

but as canna said colder temps do affect cal uptake so it's something to keep on the radar mate..

Interesting point Red eye. I'd like to add to your contribution here - Some land-race/hybrids native to middle eastern micro-climates - namely those in mountainous regions have been exposed to cold night temperatures throughout the evolutionary period and thus should be provided with these tailored conditions in the indoor setting - mimicking the growing conditions of native land-races is essential to them in obtaining their full potential and reaching a uniform maturity. Due to their enhanced cryo-dynamic resistance, these strains may be useful to growers who are unable to minimize the temperature difference between the day and night periods.