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is that your flowering area next to your veg area in the last pic?

nothing really to say since you're doing so well. your leaves look pretty dark which means you're about at the limit for nitrogen so be careful about over fertilizing.

here ya go https://www.rollitup.org/general-marijuana-growing/723-things-know-about-lighting.html

that equals about 28,000 lumens which is plenty to grow two plants. how much you get depends completely on how well you grow and the genetics of the plants. one or two ounces per plant would be typical, 4 or more ounces per plant if everything goes right in your grow.

let's see if i can help a little: - the rule of thumb for lowering temp is 3 to 5 complete air exchanges per minute, so about 700 cfm as a minimum. put the carbon filter at the top of the tent and go filter - fan - duct - light -duct - light - outlet. you can go with a passive intake at the...

not something you'd want to do every day but a one time inspection you'll be ok

change your flowering time light to seven pm to seven am and keep your plants covered in the suv. move back and forth twice.

you have a little nute burn but your main problem is too little light. if you're using the entire 4x4 growing area you only have about 1,000 lumens per square foot and you need at least 6,000 lumens per square foot to get decent bud.

no nutes yet. they're probably over watered, maybe under watered. let the soil dry out some before watering again.

from that camera angle those plants do not look badly stretched. you judge stretch by the distance between nodes - an inch or two is great, 5 inches would be stretched. the more the nodes the more budding sites you have, so it is kind of important. you control stretch with the strength and...

you can fit about 15 medium sized indica blend plants in that space but it would be more efficient to divide the space into vegging and flowering areas. that way you can have multiple harvests where with one area you only harvest every 4 months or so. .5 grams per watt of light would be good...

how do you check temp? to check air temp you keep the thermometer at the height of the plants but shielded from direct light. the radiant heat from the lamp will heat the thermometer higher than the actual air temperature without a shield.

search 'duct muffler' for links to product that works pretty well. also, have you thought of getting a speed controller for your fan so you can dial it down to the speed needed to get sufficient ventilation.

that's just another way of asking which is better, large plants or sea of green in the same space. think s.o.g. has been proven to produce more.

if you can arrange the ventilation then a carbon filter vented outside the room is the best option. ona gel alone works fine but you'll go through a fair amount

you can flower now or literally any time later that you want. the plants double in size or more when they flower, so 18" to 24" would be about the right height to start flowering and end up at 4'. but genetics matter more than anything when it comes to size so without knowing strain its a bit...

a couple of things to think about: if you divide the space into bottom 2/3 and top 1/3 you can have a vegging space separate from your flowering space. this lets you harvest crops more frequently and net net get higher yield. look up perpetual harvest on this site. if you are smoking 3...

everyone is right so far, but your basic problem is that your lights are too far from the plant. drop the light as low as you can without burning your hand (kept at the top of the plants).

an air-cooled hood and ducting outside the room will give you alot of bang for the buck because you'll be able to keep the light much closer to the plants, increasing plant size and yield. personally, i would leave out the co2 if you have to drop something. it only helps yield if everything...