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Hey guys
I've been running a DIY air pruning and root trapping/constriction thread since February, things are going well. I've been running tests with DIY Air Pots and landscaping fabric liners, both seem to work equally well with the lined buckets being easiest and the air pruning bucket with a cover bucket being the most fun - lots of visual immediate gratification.
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I need a rigid bucket for low stress training, and I have a couple dozen 5 gallon buckets that I'd like to convert.
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1. Drill a 1/2" hole every 1" center. Drill a 1/4" hole between the 1/2" holes. I put pro mix in the bucket to make it more rigid and the drilling was much easier.
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2. I lined the bucket with fiberglass screen to keep the Pro Mix from falling out of the holes.
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The plant goes into veg for 2 weeks under a 150W HPS, I'll train the plant a bit each day and in two or three days the two stems will be bent in semi circles. Then I'll train the branches to grow up and it's a nice scrog style grow.
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I'll follow this plant through flower to see if it performs better than usual, after I harvest I'll check the root system. And post pictures of both.
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I transplanted and repotted a half dozen plants tonight, using 3 different techniques to promote root branching.
1. Air Pruning
I drilled 1 1/2" and 1/4" holes in this 5 gallon bucket then lined it with 5 layers of fiberglass screen. I'm hoping the 5 layers of screen keep more moisture in and work for both constriction and trapping.
Thanks to OneEyedWilly I just put my air pruning bucket inside another bucket when I want to keep more moisture in. This plant is a Strawberry Cough.
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2. Root Trapping
I picked up two types of landscaping fabric, one that is a thin sheet with tiny holes (constriction) and the second a thicker woven mat (trapping). This first one is the thicker woven fabric, much easier to work with because it hold it's shape. This one has my best hopes for a liner for our existing buckets. The fabric is tightly woven on one side and loser on the other - loose side on the pro mix / roots side to give the roots a path in, tight side toward the bucket to stop circling the bucket behind the fabric.
I repotted a Bubblegum clone in this picture. I roughed up the root ball a bit, tearing out the circling roots.
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3. Root Constriction
This fabric is very thin and slick with tiny holes. I'm hoping that the roots go through the holes and the constriction forces branching behind the constriction. I have concerns about this fabric because the holes might be too small for the root tips to go through. And it's pushed up against the bucket wall, the roots will have to go in the hole to circle the bucket - if there were pro mix behind the fabric it would make the roots going through easier.
This is my only Jack The Ripper pheno, I don't think I'll keep it so I don't mind beating it up a bit. I had a runt from a double shoot seed that made the whole grow room smell of lemons, this one just has a mild lemon smell. I'll have to see how the high is in another 2-3 weeks when it's cured properly.
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I'll give the plants 2 or 3 weeks then pull the root balls and take a look.
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https://www.rollitup.org/grow-room-design-setup/303229-diy-air-pruning-pot-experiment.html
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