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Glandore Hydroponic Nutrients, Lights and Equipment
Barneys Farm Cannabis Seeds

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Sea of Green: Get a harvest every 2 weeks

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#1
Al B. Fuct

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This is a typical 'Sea of Green' or SoG op. Clones receive zero veg time; once they have a good set of roots, they go in to flower.

The method of putting clones in to flower with no vegging time keeps plants relatively short, to about 33-36" (~1 metre), which better suits the foliar penetration depth of indoor artificial lighting.

When I first started growing, I loaded all 4 of my flood trays with cuttings on the same day. This meant all the plants were ready to harvest at the same time, too. Harvesting/manicuring is a time consuming, tedious task- and plants which are ready to harvest have the shelf-life of lettuce, it seems.

I decided to break up the job to 1/4 the capacity of the flowering area but harvest every 2 weeks instead of every 8. Saves me from being permanently cross-eyed from marathon manicuring. I can usually harvest one tray in about 3-4 days of solid, nose-down manicuring.

This diagram shows the flow of plants through the op:

Posted Image

You can build this op in any scale you like, from a single mother and just one plant put in to the flowering area every two weeks up to as big as your needs require.

The idea is to grow only the top cola of a naturally growing plant with none of the lower branches and the small buds those branches produce. All branching, pretty much everything on the lower 1/3 of the plant, is snipped off in about wk 2 & 3. I don't like stuffing around manicuring little popcorn buds, so I just don't grow the lower branches.

Posted Image
Plant at 6 wks flowering, note lower branching is removed

Even powerful HPS lighting can only penetrate foliage so deeply, so a metre tall is just about perfect. I find that big lights give better bud density, so I use two 1000W HPS, one over each pair of 820mm^2 (~2.7 feet^2) flood trays.

The mums are maintained under 24 hour 400W MH>HPS conversion tube. Used a 400 HPS with good results for a number of years; the MH retrofit is a recent addition. The clonebox has 6x 18W fluoro tubes (24"), usually on 24/7 but shut off for the first 6-8 hours after doing a new batch of cuttings.

Clones go straight from the clonebox into the flowering area- no vegging required. They grow a little bit vegetatively for the first 3-4 weeks but then stop getting taller in wk4 and start making bud weight.

I keep about 6-10 mothers and do about 30 cuttings every 2 weeks from them. I choose the best 20-23 clones to be put in the 4-tray flowering area.

Leftover clones become replacement mothers or are discarded. Mothers are replaced one by one, about every 4-8 weeks as needed.

As each batch of clones goes in to tray #1, a batch comes out of tray #4 to be harvested, every 2 weeks.

Posted Image
Tray #1, wk0-2
(plants pictured are at 2 weeks flowering)

Posted Image
Tray #2, wk2-4
(plants pictured are at 4 weeks flowering)

Posted Image
Tray #3, wk4-6
(plants pictured are at 6 weeks flowering)

Posted Image
Tray #4, wk6-8
(plants pictured are at 8 weeks flowering)

The mother vegging area is in the same room with the flowering plants, but has a lightproof curtain (just a double layer of panda film, looped over a 2x4 screwed to the ceiling, white sides toward plants) to prevent interrupting the flowering plants' lightcycle and has its own ventilation system as well.

Each tray in both the veg & flower areas has its own pump, reservoir tank and timer, allowing the watering rate and nute mix to be tailored to the plant for vegging as well as for each 2 week phase of flowering. Nutes are Canna Vega or Flores "Substra" with H2O2, 50% grade applied at 1ml/litre every 3-4 days as an antimicrobial. Canna 'PK-13-14' P & K supplement added in week 3 only per instructions. pH runs 5.3-5.8, usually around 1400-1500ppm in all tanks. Flowering tanks are 125L, mother veg tank is 50L. Tanks are dumped and cleaned every 15 days.

Mucho yet silent airflow by way of a Spectrum Hygrow C250L 250mm centrifugal exhaust blower and a pair of axial intake blowers means the op runs consistently at 24-25C @ 30-50% RH. Have been running UV ioniser in the flowering area air for scent and powdery mildew reduction but have recently noticed ozone spotting, probably due to fewer exhaust cycles during cool months. Have put the ioniser on a timer, 15on/15off to try to sort that out.

Clones are tailored to this style of op. Please see cloning detail here.

The op has been yielding 13-16oz per 23 plant tray, every 2 weeks. Can do better; I've recently rebuilt the thing in a new location and am still tweaking the op to cope with the new conditions. It's done 1oz per plant in the past. Would like to know what I got so right... :D

Having a problem recently with leaf chlorosis in late flower. They go bright yellow and brittle after wk 6 or so. Plants are not gaining height and leaves are smaller than usual. Bud weight's down, too. Looks kinda like a Mg or Ca deficiency, but might have been due to a dodgy pH meter which may have caused me to run pH too low by about .5 or so for a few weeks. Replaced the pH meter, now looking for improvements in later batches. Verified temps and RH are in the usual range. Just replaced the 1000HPS tubes as they were getting old anyway. All suggestions for troubleshooting this one are most welcome. :D

Edited by Al B. Fuct, 29 June 2007 - 01:00 PM.

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#2
WantDaChronic

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looks like a very nice setup to me :D the only thing i would do differently is filling the tray with the perlite and going 5 x 5 plants instead of 4 x 4 in pots, but it still looks like you are pulling lots of nice buds on a regular basis so keep up the great work :D
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#3
Al B. Fuct

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looks like a very nice setup to me :D the only thing i would do differently is filling the tray with the perlite and going 5 x 5 plants instead of 4 x 4 in pots, but it still looks like you are pulling lots of nice buds on a regular basis so keep up the great work :D


Thanks for that. It's doing OK but it could do better if I could sort out some little problems.

I do like having the plants in pots. Makes them mobile within the flowering space for pruning, spraying, putting underperformers in better light positions, etc.

I've been trying to work out a way to retain plant mobility but get rid of the rockwool, such as some sort of aero or NFT. Haven't hit just the right combination just yet, but thanks for giving this a think. :)

The sketch at the beginning is just sort of a block diagram. There's actually 10 mothers in a 300mm x 1000mm flood tray and each 820mm^2 flowering tray holds 23 x 8" dia plastic pots.

Edited by Al B. Fuct, 29 June 2007 - 01:07 PM.

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#4
Al B. Fuct

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I've been trying to work out a way to retain plant mobility but get rid of the rockwool, such as some sort of aero or NFT.


...and I'd like to avoid clay pellets, too. Drop a handful and you chase them around the room or crunch them underfoot. Grr.

hmmm... a medialess yet plant mobile NFT/aero? Anybody seen any existing systems?
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#5
WantDaChronic

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have a look in chato's grow diaries, his plants are grown pretty much in buckets of water using only a handfull of medium for every plant :D he always gets fantastic looking plants as well so even if you are not interested in his method of growing, his pics are still well worth having a look at :D
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#6
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Ever had to deal with a pest breakout? That can be a bit of an achillies heel with continuous harvest sogs....

Great grow dude, looks like you're dialled in. :D
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#7
Al B. Fuct

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have a look in chato's grow diaries, his plants are grown pretty much in buckets of water using only a handfull of medium for every plant :peace: he always gets fantastic looking plants as well so even if you are not interested in his method of growing, his pics are still well worth having a look at :peace:


Thanks for the tip, will look around :)

Ever had to deal with a pest breakout? That can be a bit of an achillies heel with continuous harvest sogs....


Sure can be. Years ago I had some mites- a blast of 'Sorcerer' (abamectrin?) got rid of them in one pass. I always have a few gnats, but I put out yellow stickies which seem to trap enough of them that they never cause much grief. The gnats like the 24 hr light on the mums better than the flowering side, but I change out mums after about 4-8 weeks- and the discarded rootball takes any gnat larva problems with it to the rubbish bin.

Great grow dude, looks like you're dialled in. :D


Thanks. :)

Mind you, there's some things to fix. I'm feeling kinda like one of the Spinal Tap guys saying 'it coulda been blacker' when I complain about the op. :D It works but I gotta find out why it's not so happy at the mo. Hopefully the new pH meter will clear things up.
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#8
Luke Skywalker

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Heh heh, I know what you're on about.... hee hee

Give the Dead Red a go if you get em again. Good stuff that.

DWC is very susceptible to nute temps though.... Good growing, but has to be cool. Anything over 27 in the root chamber and you could be asking for it.

Prefer the big plant method meself, but hey, whatever floats ya boat! :peace:
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#9
orion2076

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Great effort mate. sounds like a lot of effort, although the results look like they are worth it. my setup isnt anywhere near as complex as that. what i did this time was i started plants in rockwool under fluros and had them goin for 6-7 weeks. I put them in the cupboard under 400w ta veg for 2 weeks. Same time I put seeds straight into the medium. After 2 weeks I put the lights to 12/12. Cut a long story short, i'm bout 2 weeks away from great buds, and there is no difference in the plants whatsoever. I had read that a plant needs to veg 6 -7 weeks b4 turning to flower. I guess I'll find out 4 sure when i smoke them. just good to read someone else doin kinda tha same thing. plants look great mate.
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#10
Al B. Fuct

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Give the Dead Red a go if you get em again. Good stuff that.


Thanks for the advice. The 'Sorcerer' instructions warned against using the stuff more than once a year to avoid building resistance. I haven't used it for some years but it's always good to know of other known good stuff. Thanks for that. :peace:

DWC is very susceptible to nute temps though.... Good growing, but has to be cool. Anything over 27 in the root chamber and you could be asking for it.


Good info. What is the minimum temp limit?

Prefer the big plant method meself, but hey, whatever floats ya boat! :D


Big plants will keep your plant counts down. Could be real important in a worst case, esp with some new bad growing laws enacted recently in NSW. 'Personal' is now only 5 plants... :peace:
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Barneys Farm Cannabis Seeds
Glandore Hydroponic Nutrients, Lights and Equipment
WARNING/DISCLAIMER The OZ Stoners cannabis community contains information regarding cannabis & other drugs; it is designed for mature (18+) audiences only. This site in no way condones the use of cannabis by minors. The content here within this cannabis community is for educational & entertainment purposes only. Any buying/selling or trading of illegal cannabis seeds, clones, flowers, resin or oil is strictly prohibited within this cannabis community.