How many plants/seeds did you kill?
I’ve allegedly killed flowering plants too early, before their fruits were ripe, and I suppose that’s the worst way to kill a plant. The worst mistake isn’t to kill a plant, especially a seedling. Young plants don’t represent a significant investment of time and money. But I think the worst thing you can do is torture a plant with suboptimal conditions. For example, if you grow 10 plants in a 4x4’ tent with a 150w HPS or “1000w LED”, an air conditioner, an expensive charcoal filter, expensive genetics, and pricey “cannabis specific” nutrients. That one shortcut might cost you $1000 and four months to yield next to nothing.
What were the main causes?
Ignorance, impatience, and/or neglect. Some seedlings just aren’t meant to live, but usually unintended premature plant death is caused by the three things I mentioned.
Suggestions to avoid main issues
It’s good to follow advice, but also ask “why am I doing this?” repeatedly. Ask it 5x about the same root issue. Why do I prefer this brand? Because I trust them. Why do I trust them? Because other people recommend their products. Are other brands working for other people? Yes. Are those brands a better or worse value in some way? You see how this works.
Map out your plan on a calendar ahead of starting. Look for conflicts with family plans and work. On a micro level, come up with SOPs for major and minor tasks. Print them. Follow them. Checklists are great if you can follow them. Create small rewards for following your to do list.
Grow a variety of crops, and practice germination on other things. If you can get elderberries to germinate, cannabis becomes a cakewalk. And if you can make hundreds of your own seeds to practice with, that’s even better.
Lastly, don’t be afraid to kill plants. Like I mentioned before, the worst thing you can do is waste time and money on a sickly harvest. Sometimes you’re better off with a fresh start.