like_clockwork

Im working on getting pitcures but basically i started with 6 which are about 2 months from seed and 4 that are 3 weeks from seed and one vortex clone i got from a buddy that was horribly over fertilized but is now well that is about a month. I started out using incandescent bulbs and didnt really know what i was doing and stressed the first 6 kind of bad and tranplanted them into way to large of pots (Although all are now going strong). i started doing research and ended up with a 600w hps and some really expensive bulb the grow shop guy gave to me and said i could veg and flower with. it didnt take any research to find out i needed some sort of cooling system immediately so i have a 4" horticulture fan and exhausting outside. a big white fan blowing directley on them and a air purifyer by the entrance of the room. I am using fox farm ocean forest soil, for my veging. i have one flowering because i dont know how big i should let them get but i can only raise my lamp so far. the one in bloom i flushed and am using fox farm big bloom, tiger bloom, qnd beastie blooms. i also have some unknown foliage spray givin to me by someone at the hydro store. So thats what i have going and will get pics up asap.

My first and constant issue is the height of the lamp. The hydro store guy told me 2 feet but they scorched, and moved it 3 feet, it was okay and then scorched after a while, and now is about four feet up. it doesnt seem right, as the grow shop told me 2 feet. is that too far? any help would be great. thanks.

Roach

include this in your pic series.

40 watts per square foot is a good rule to follow.

I agree 4 feet is a fair distance away.

Sounds like you are running your light on 24, off 0 ?

The three different growth starts will be a problem when it comes to flowering under 1 light source. The 6 should be close to being pushed into flower cycle, whereas the 3 week old have maybe at least 5 more weeks of veg cycle. This depends on the strain.

A veg light cycle of 18 on 6 off might give some relief from the scorching...if that is what it is, and not a fert blockage or other nutrient problem.

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like_clockwork

The big one on bottom right i put in bloom last friday. ive also been trying a variety of topping and FIM and the low stress although i dont know anything about them just what people have told me. so im just trying everything. The other big one at top right is def female and i love the way it grew and would like to take clones though i dont know know anything beside take clipping and put in water till roots grow.

mothernature

Very nice!

4' does seem a bit far.

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farmergiles

They look very healthy.

What is the temperature under the lights where the plants are?
2 feet is a good distance as far as the intensity of light from a 600w goes for flowering plants but the temperature will vary depending on your space and set up.
If temperature is not controlled the plants may scorch, even if they are at the optimum distance for the light.

If the space is too big the fan might not be cycling the air quick enough. Or you might need a (larger) hole for the passive air intake.

You can probably pot up the smaller ones soon, if they have a bigger root mass this will make them more robust.

Do try making clones- even if they all die you haven't really lost much . There's a thread here.
Also there's lots of info about lighting in the FAQs here. There is also more info about ventilation setup if you look in the next section of the FAQs.

You're doing something right anyway, they look happy as can be .

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like_clockwork

oh sweet, thanks for the threads.

The temp is now usually 75 - 80 because its getting cool outside but there for a minute damn i was battling heat like crazy. but ya i looked at them this morning and even at 4 ft some edges are started to cry. it was like 85 this morning in there though so i had to cool the whole house. good now.

ill re pot this little ones tonight cuz i need to get some regular soil. last time i put a lil gal in the fox farm soil she shrivled like a raisin. i was told over fertilize. i dont know much though.

farmergiles

Don't over fertilise- it is way easier to remedy under fert than over fert. They look very good atm.
Manufacturer's quoted dosage is usually way high. Recently I switched to a light soil mix and reduced dosage of nutes. To my surprise yields and plant health increased.
If the concentration of salts in the soil is lower the plant can function much more efficiently and there is much more room for error. If the soil is too hot the plant struggles just to take up water.

80F is fine, any more is a problem. But if you are running at 80 now, almost certainly the temps were higher when you had the light closer. So I suspect the proximity of the light was causing high temp which caused the problem. If you get the temps under control then you should be good to move the light closer again.

Measure temperature at the canopy- anywhere else in the space is irrelevant really.

You might do better at controlling temps if you sectioned off part of the space or maybe splash out on a growtent.

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like_clockwork

A grow tent seems like a good idea, i had it inside that closet with the doors shut but it was like an oven.and i felt like the white fan was just blowing hot air around.

i was going to take better pictures on the one in bloom to get an opinion on the sex but i notice a bunch of pouches at the top. to i pulled it and tossed it with the dirt and washed the pot and re potted my female in it. hopfully no pollen got on anything yet.

Bobbito Blaze

That's kind Of far away are you shure they where burning from the light and not being over fed first time growers tend to over love there plants have your fan blow right on the bulb of the light and blow that heat off don't cool the plants go for the source it works for me

like_clockwork

yeah im positive its the light. i had a clone that was over fertilized and it dont look like that. it starts with the edges folding on the leaves and then little brown spots appear and if left there the spots open up as if a magnifying glass where there. i have a 4 in centrifigul fan hooked up to the hood sucking the air out.

i think the grow shop guy just gave me a super gnarly bulb

Peace seeker

plants look good.

Work on your ventilation issue, get the hot air from the lamp out of your closet and the lamp closer to the plants. Blow one fan on the bulb and have one for over the cannopy.

you re loosing alot of lumens with the lamp at 4 ft. There's a light-distance chart somewhere on this site. Look for it to find the optimum distance.

repot the bigger plants in one size bigger pots, dont feed too much and dont pamper to much.

your closet is pretty big. you could have 8 good sized plants in there (sog) and a huge production with the 600w.

Bobbito Blaze

are you still having a problem with them since you moved the light?

like_clockwork

good lord hell ya. i was just in there for like two hours trying all kinds of stuff. i tried facing the fan toward the light but i dont feel like it does much because of the glass and it was hot. i tried recycling the exhuast back into the hood but i dont think that did shit. i have the window open in the room but i feel like thats a big hole in the wall where aire doesnt move lol. in the end i put the exhuast back under a blanket goin out the window and the fan back on the plants and its still hot as shit in there. shits killin me

Roach

you're sure the exhaust flex pipe isn't getting collapsed ?

also is the air inlet of the light fixture the same size as the exhaust outlet ?

do you know the cfm rating on this fan ?

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Roach

this is critical for large wattage lamps.

fg is wise.

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like_clockwork

not sure of the rating the positioning is covering that. i have an adapter from 6 to 4 inch.

so you think i need to confine the plants in the closet again or invest in a grow tent to solve this

Roach

the fixture was meant to have a 6" fan ?

could be part of the problem.

You said the fixture itself is hot, this may even be dangerous.

there should also be an opening in the fixture to let cooler air into it.

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like_clockwork

naw the fixture itself isnt hot. just the glass.


hmm yea i always thought i needed a bigger fan but thats what the grow shop guy told me i needed cuz i didnt really know anything, and turns out neither did he lol.

he also sold me two different size hangers and a 25 ft exhuast hose that turned out to be a ten lol

i suppose ill get a bigger fan tomorrow.

whats a good way to hang the fan with the hood and also be able to move it up and down?

thanks for the info

farmergiles

Either really. But you need two holes, one for the fan to exhaust air out of and a passive intake (ie no fan) to allow new air in to replace it.
That way the fan is removing hot air efficiently from the lamp to somewhere else, rather than just cycling the air in the whole room.

So you'll probably need to make a hole in the wall or the door or something if you use the closet.

Growtents usually have the holes pre fitted.

I think the fan you have should be big enough if you get the set up sorted.

As well as being good for cooling, the set up above can easily have a carbon filter added to the exhaust for odour removal. Because the pressure inside the space will be a bit lower than outside, no smells should escape.
Flowering cannabis plants will smell quite a bit.

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Roach

can the fan be mounted directly to the adapter or fixture ?

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