No wrong answers

As a beginner with an unbiased and fresh perspective, I would simply say that topping autoflowers can be done without issue, provided the plant is thriving in an optimal environment. By this, I mean ideal light, humidity, and temperature levels (notably, proper VPD), along with suitable watering and nutrient management. If all these conditions are met, and the plant is growing several centimeters daily, then with perfect timing, topping should not be problematic. In fact, it could even provide a notable advantage in terms of growth structure, ultimately enhancing bud quality, as it promotes an even canopy height. The idea that topping could potentially “shock” the plant might be true, especially if the plant is less well-cared-for. Recovery time can vary from a few days to over a week under suboptimal conditions. Combined with poor timing, this could lead to significant setbacks. However, this risk isn't exclusive to autoflowers; photoperiodic plants that are poorly managed can face similar issues. The difference lies in the ability to extend the vegetative period with photoperiodic strains, which can compensate for any setbacks—something autoflowers don’t afford due to their fixed lifecycle.

Hi Yan, on my autos,I've defoliated mostly. Tried Topping but Fimmed it. Tried tie down. Some worked some didn't. I've been following you and @XII_XII_MrGreen for HST training by topping and mainlining which I will try.

I've only used LST because that's what I was told to do. I don't have much experience but I'll try it next grow.

I usually top around week 3-4, even my autos. In my eyes it all depends on the strength of your root system, the better developed the better they’ll handle the HST. I usually feed root stimulant after I cut and generally speaking rarely to never have issues with a stunted plant.

I don't want to stunt plants for too long, and that happened to me when my lst happened to be a bit too harsh.

Nice keep it coming , mine got toped at end of week 2 24hour light schedule.

I find it can give a couple of days shock. If this is done during week 3 - 4 when they are in their stride you can cost significant yeild.

I do it when my colas are getting too close to the light. If they don't get too close I don't worry about it. 👍🏻🌱