Do i need to leave little stub of main stem when topping?

You cut too early next time wait for them to be like the one underneath more grow up (tall) and cut more up

Your fine to leave a stub. It will just heal over. All looks well.

I would leave as much of a stub as you can. To help prevent splitting later when weight is on it.

I would let those sub nodes (2 new main) to grow more than this a bit. As topped. Your internodes is a bit tight in pic.

To answer your question, yes this ok and you do not need to remove the little stub of a main stem, just leave it be.

When topping a cannabis plant, the typical recommendation is to cut just above a set of nodes, leaving a small portion of the main stem above the cut. This is often referred to as leaving a "topping stub." The reason for leaving a small part of the main stem is to prevent any potential damage to the emerging new growth at the nodes. However, if you have successfully removed the main stem above the fourth node without causing harm to the nodes or new growth, it may still be fine. Cannabis plants are resilient, and as long as the nodes and emerging branches are intact, the plant should recover. Here are a few things to consider: Check for Damage: Examine the nodes and the area where you made the cut. Ensure that there is no damage to the emerging new growth or nodes. Monitor Growth: Keep a close eye on the plant's growth in the coming days and weeks. If new branches and nodes continue to develop without any signs of stress or damage, your plant is likely doing well. Provide Support if Needed: If the plant appears top-heavy or is struggling to support its own weight, you may need to provide support to prevent any potential bending or breakage. Adaptation: Cannabis plants are adaptable, and they can often compensate for changes in their structure. As long as the nodes are healthy and new growth continues, the plant should be able to adapt to the topping. Remember that the specific response of a plant can vary based on genetics, environmental conditions, and overall health. If you're uncertain or encounter any issues, providing more information or consulting with experienced growers can be beneficial. Additionally, observing how your plant responds over the next few days will give you valuable insights into its overall health and resilience.