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Ok so I tried to get mylar-like gift wrap but it ended up having tiny tiny colourful stars all over it. Would that be a bad idea, with the funny colour spectrum? So I tried again and bought some arty foil called Brsfolie or something which is much tougher and easier to shape than tinfoil, so it doesn't crumple up. I used that just on the back and inside of the door of this cupboard, as the rest of the sides are already white. I will at some point paint it white. I'm running two 20W CFLs that produce 1095 lumens each. At the moment there is actually no ventilation at all (apart from when I open and close it for some), yet temp stays around and about 26 degrees celsius. Sometimes it does stray higher a tad so I know I need an extraction fan asap. I will update the thread when I get those tomorrow but I have some questions regarding them;

1) Is it best that it should be on the top (the "roof")? Heat rises afterall. Or should it at least be higher up than the passive intake/intake fan? What is the rule of thumb here?

2) With passive intake does it not smell more?

3) With passive intake and active extract is it possible to starve the plant?


Now to a slightly different point with more questions

So the cubic feet of this box is 3.12 Ft if I did that right (LxWxH). Yet if we consider that the plant pot is 10cm high and the lights + sockets are 17cm, the height of the room is more like 53cm (1.7 ft) which reduces the cubic feet. But I should be able to hoist these CFLs to the sides so perhaps it's more like 2 ft height. Anyway, my point is I am in no position to go making a gigantic plant anyhow. I want a small plant but

4) Could I veg,flower,re veg a small plant but one day put it in a larger environment and during reveg would it grow even bigger? Basically I'm saying can a MJ plant be stunted forever?

5) I have seen grow pics where the pots are placed in brown paper bags.. the leaves and stalks are lifted out of the bags. This is one of many methods I see to encourage clustered upwards only growth. Is that really possible, as that is what I was hoping with this gro bow..clustered and upwards.

Even whilst keeping this effort on a small scale I will probably make a larger room when this plant is a decent size. But I'd like to know the limitations at the moment.

Otherwise I can report the plant is doing well (only had it setup like this two days), although those first leaves are still curled funnily like I posted about in sick plants, the newer sets are just fine.

Please throw any thoughts or suggestions my way.

Would have been nice to have some answers from those 80+ people who checked out the thread For questions one and two I just went with passive at the bottom and extract on the roof as a guess. I need to put some of that guey stuff to fill the gaps still. I also sprayed the inside with white paint, getting rid of that folie stuff.

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Swap out those 20w red cfl's for at least 4 20w blue cfl's and hook a pc fan up sucking out passive intake should be fine and you'll really appreciate the difference plant will double in size in 1/2 the time.

I bought my cfl's off ebay daylight cfl's are what you're after about £3.50 each.

I wouldn't just hang the bulbs I would cut a piece of wood flat then mount 4 sockets on that and raise and lower that, you get better light spread and be able to grow a beast.

I would defo scrog and if you're not using feminised seeds or a clone I would be tempted to get some and start them now.

Good luck


You swap back to red CFL when you flower.

Hi tutu can i ask why you think these are red CFLs? The box said soft white light. It could be the camera filter making them look red in this pic as they just look white to the eye. Or are these certainly red?

Edit Note: Latest pic has new bulbs. The others broke during a refit.

Soft white are normally 2700K (Colour temp) bulbs we call them red as they have more red spectrum in them.

You want blue spectrum 6500K daylight bulbs (They have the sterile hospital look to them) although cool white (Kitchen style tubes) work well (5000k) it's confusing but there's lot's on it on this site and the internet.

When you veg use daylight bulbs (6500k) when you flower you want the 2700k soft whites which you have now.

2 sets of bulbs one for growth one for flower.

And two lights, one for growing, one for lighting your spliffs

Sorry to sound like a stuck record, but ventilation and odour control.

Possibly even more important with micro grows.

- Don't apologise - Maybe Joolz can add some permanent background audio to the site - Whole bunch of monks chanting "Ventilation + Odour Control, Ventilation + Odour Control, Ventilation + Odour Control", with an occasional chorus of "Tell no one - Loose lips sink ships, Tell no one - Loose Lips sink ships........"

To OP - I like mixing up my CFL spectrums and mix warm white and daylight bulbs throughout veg and flower. Check out Blab's diary for the best tips on growing in a titchy tiny space.

I just took this pic for someone planning a similar grow. Thought I should update this thread for some follow-through It's been outside the last month because the loft air removal plan failed. It still fits technically though.. but wider would have been better for anyone trying this.

Well as its a small grow similar to what I am planing, I was wondering if anyone reckons a ' NScessity Air Cleaner and Purifier ' which is around £30 would do the job of odour control for such small scale growing

if any ones used one of these could they leave some feedback please.

It'll help but it won't be enough. You can make a DIY carbon filter if you can't afford to buy one, but carbon will be needed somewhere along the line.

kool thx for that glad i dint actually buy 1 yet then