It’s my first grow. No problems except nutrient burns or deficiencies. I used it twice. Once in vegetative and once in transition.
I use Neem Oil with soap every two weeks during veg. Helps with many things.
You can use it in veg, but don’t use it late into flowering. It’s a strong smell, and may affect final flavors/terpenes…
Hi welcome to the forum
If only ever used it on my fruit trees