Drilling my stalks

When is the best time to drill the stalks? And how many holes?

5-7 days before harvest. Use zip ties above and below your split. This is what you’re aiming for:

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May be more than you asked, but here is an article I found useful.

Splitting Cannabis Stems

Splitting the stem of cannabis plants is a controversial technique buzzing around the cannabis forums of late. Outdoor ganja farmers in Colombia during the 1960’s and 70’s were reputed to “ring” cannabis stems a couple of weeks before harvest. A pocketknife is the only tool needed.

The practice is believed to have given Colombian Gold its golden nugget bag appeal. By inducing senescence to increase potency and break down chlorophyll, the method helped make the strain a legend, allegedly.

The splitting technique has been popularized by outdoor Dutch cultivators online. Splitting stems follows similar logic to “tree ringing”. Instead of completely removing a few layers of bark from the circumference of the stem you split it with a vertical cut through the middle. Make no mistake. This is extreme high-stress training.


When To Split Cannabis

If you are going to experiment with the splitting technique, timing is crucial. Splitting the main stem of a flowering female cannabis plant 7-10 days before harvest is the window that most growers favor. Inducing high levels of stress to force the plant to produce more resin and terpenes with a split is tricking Mother Nature. Marijuana will respond to this kind of stress negatively if you split too early.


Splitting cannabis plants stems doesn’t require brute force. Rather precision, preparation and the right tools for the job are what you need. Moreover, splitting is best suited to outdoor marijuana crops. Although, an indoor experiment can succeed following the same methodology.

1.First, gather up your splitting tools. Don’t worry, they are all easy to come by. You need a large, non-serrated, sharp kitchen knife, 3 pencils or kebab skewers if can get them, and some string. Next, size up your stem. Measure out an area approx 15-20cm long from just below the lowest set of branches towards the ground.

2.Wrap the string around the stem a few times. Tie off two pieces of string to mark the borders of the area to be split. One for the top and one for the bottom. Then carefully drive the blade through the stem.

3.With one hand on the handle and the other depressing the dull side of the blade slowly and as straight as possible split the stem. All the way to the lower knot. Don’t remove the blade just yet.

4.While the wound is still fresh and open with the blade wedged in the bottom, insert the 3 skewers to prevent it from closing. Slide out the blade and make sure your skewers are spaced out. That’s how to split the stem of a cannabis plant Dutch style.

How To Split Cannabis Stems


Splitting is reputed to increase the potency of marijuana and possibly boost flower production too. Hard data is difficult to come across to verify this claim. Unfortunately, all we have to confirm the effectiveness of the splitting technique is forum chatter and some YouTube vids. Albeit footage by skilled Dutch stem splitters.

In theory, this high-stress method works, and they are at least reporting positive results here in the Netherlands. Experiment with one cannabis plant as a test case if you are considering it.


Splitting, by its very nature, is rough treatment for cannabis plants. High stress close to completing the bloom cycle is risky. For auto-flower cultivators, this technique is best avoided. Similarly, novice growers should skip splitting. Unless you’re already hitting the potency barrier, the splitting technique is unlikely to push your marijuana to produces extra potent gooey buds.


Thank you

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Here’s a great guide Robert explains stem splitting towards the end but there is a lot of useful tips in this guide

So,does drilling holes in the stalk have the same affect?

That’s wat I did yesterday with my blue dream (stalk was to big to split) and put a pencil thru hole, So I’m interested in the answer myself

I don’t know if you drill just one hole or multiple

I drilled two holes myself different directions

Do you still push something through the holes?

I did pencils

Friday is harvest day