Sativia dom, 90+ days to flower-first 30 days under fluros?+-

xyz · 06-29-2005, 09:57 AM

The clones:
Sat dom, 90+ days at 12/12 to harvest

I currently have cohorts going to 12/12 on my flowering bench and spending 90 days there.

My thought is doing the first 30 days of flowering under shop fluros and then 60 days on the bench.

I am doing a modular scrog, so this would give me several advantages.

I could take an air layered clone and veg it for 30 days, then it would go into the 12/12 fluro cab for 30 days.
During this time the stretch would take place and I could do all the weaving I needed to do to fill up my screens.

The biggest advantage would be the increase of my cohort size. Currently I would harvest 3, 1 x 2' scrogs each month.

Making this change would allow me to harvest 4.5, 1 x 2' screens each month.

The down side would be the first 30 days under fluros instead of a 400w HPS.

Will an idea like this work? What would I be giving up with the 30 days under fluros?

All ideas and comments are welcome.

BaadPuTthyKat · 06-29-2005, 10:07 AM

Sounds great xyz, you might get more g/w with modular scrog, it seems to me, than pretty much any other system! Very efficient....

The one concern I have, which is probably the same as yours, is flouro only for 30 days....for 50:50 or indica dominant it's no problems, but you may get more stretch because the sativas will seek more light? Just a thought xyz, but it will still provide you with lots of bud sites, which is what really matters. If you can scrog the sativa stretch OK, then do it. I would have thought that 30 days was a bit long though....

xyz · 06-29-2005, 10:29 AM

Quote:

Originally Posted by BaadPuTthyKat

Sounds great xyz, you might get more g/w with modular scrog, it seems to me, than pretty much any other system! Very efficient....

The one concern I have, which is probably the same as yours, is flouro only for 30 days....for 50:50 or indica dominant it's no problems, but you may get more stretch because the sativas will seek more light? Just a thought xyz, but it will still provide you with lots of bud sites, which is what really matters. If you can scrog the sativa stretch OK, then do it. I would have thought that 30 days was a bit long though....

All my cycles are about 30 days, so I am kind of stuck with that.

I am hoping the stretch time under fluros will be to my advantage. I am monitoring three plants that just went to the flowering bench to measure the stretch rate.
I think I am liking this idea.
Thanks for your reply.

Budmaster · 06-29-2005, 11:26 AM

hi there ~

what type of flouro's are they and how many w/ft2? and the shape and size of your pots? B~

xyz · 06-29-2005, 11:55 AM

Quote:

Originally Posted by Budmaster

hi there ~

what type of flouro's are they and how many w/ft2? and the shape and size of your pots? B~

4' long double bulb shop fluros. Nothing special. I like them because they don't encourage the vegging clones to get too big.
The pots I will be using will be 3 gal.

Budmaster · 06-29-2005, 01:17 PM

>> "Making this change would allow me to harvest 4.5, 1 x 2' screens each month ... " <<

ok, I don't quite understand the 4.5 modular units, but your square footage is 4.5 x 2 = 9 (ft2) ... I can't picture how they'll fit under a single double bulb flouro fixture, so I assume you're using two fixtures, or 4 bulbs @ 40 watts each, for a total of 160 w, divided by 9 sq ft, for 17.777 w / ft2 ... this is not near enough light for a sat dom in flower ... 400w divided by 9 sq ft = 44.44 w / ft2 ... is just barely enough for the job ... 6 flouro bulbs would be 240w, for 26.666 w /ft2 ... which is much better than 17.777w ... but if you wish to stick with only the 4 bulbs, consider using the "New Wave T5 High Output Fluorescent Grow Light 4ft 4 Lamp" instead, >> http://www.bustan.ca/product_detail....SID=24&PID=299 << , which'll give you 24w / sq ft ... of course this is calculated at 4.5, but 4 units x 2 sq ft each is 8 sq ft, so 160w divided by 8 = 20w ... and at 8 sq ft, the "New Wave T5" would provide 27.5w, which is a big improvement over 17.777 ... and the 6 bulbs @ 40w ea, for 240 watts, divided by 8, would give 30w / ft2 ... which is your best alternative ...

if your temps and humidity level(s) are good, and nitrogen levels not in excess, and you keep your flouro's at the right distance from the canopy, stretch should'nt be a problem, at all, especially at that wattage level, and under a blue light spectrum ... if anything, the biggest concern you might have, by blooming at 17.5w / sq ft, is a hermie problem, if your hybrid is highly sativa in its composition, and if it has'nt been specifically bred for hermie resistance under low lighting conditions ... but, 30w / sq ft, which is almost double the watts, considerably reduces chances of a hermie problem ...

3 gal. pots are good, but a shallow pot would better suite your set-up, so maybe try and find the shallowest 3 gal pot you can ... and btw, what is the maximum vertical head space, in the cabinet, between the screen and the bulbs?

B~

xyz · 06-29-2005, 02:09 PM

The container is 10" x 13" and 7" deep.

They fit in this crate very nicely.

Add this 1' x 2' screen and I have 6" of clearence from top of pot to screen. Check out the last couple pages of my active gj for three of these in action as we speak.

My flowering bench is 6' x 3'.

The cab I would be using will hold 4 of these modular scrog units. Just a 2 bulb shop fluro in there with a reflector. The inside of the cab is painted flat white.

I really want stretch. I will use that phase to weave the stretching shoots into the screen during that 30 days.

That hermi issue may be a problem. Indoors this strain tends to want to herm a bit. I am trying to get this under control. Tough job. Not a problem outdoors at all.

Sounds like I will need more light in there.

Budmaster · 06-29-2005, 02:27 PM

>> Sounds like I will need more light in there. <<

definitely! read my last post again, as I made some edits ... explaining that you should go with six bulbs @ 40w each, for 240w, which will provide 30w / sq ft, calculated at 8 sq ft ( 4 units at 2 sq ft each ) ... 30 w/ ft2 is your best bet at reducing chances of a hermie problem, and filling out your screens ... the pots look good!

B~

Budmaster · 06-29-2005, 02:34 PM

>> My flowering bench is 6' x 3'. <<

will you have just the 4 units on that bench, or 9 units? iow, is your 400w lamp supposed to cover 18 sq ft? if yes, that works out to 22.222w / sq ft, which is again on the low side, and a light mover would be a good idea to improve light distribution ... but a second 400w lamp would be better ... B~

xyz · 06-29-2005, 02:53 PM

Quote:

Originally Posted by Budmaster

>> My flowering bench is 6' x 3'. <<

will you have just the 4 units on that bench, or 9 units?

I will be adding another 400w hps to cover the area.

I will 4 crates (1 cohort) in the 'stretch cab' (12/12) and another 2 cohorts on the flowering bench. Totaling 12 crates/plants.
I will be moving them once per month for a perpetual harvest scrog.

I had thought about adjusting my cohort size from 4 one month and then 5 the next to cover all my bench zones but my cab will only hold 4 of them.

That's ok, as I want to introduce some new strains in the future as well as back crossing the seeds I have comming in soon. So my cohort size is 4 crates. It will leave 1x2' available for expierementation.

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