Blue Dream topping or LST at what week in Vegetative?

Let it grow for 5-6 nodes then cut at 3-4 node .. also I will say to do Defoliation, LST or scrog ...

Around week 2-3 or when you have 5/6 node sites.

Based on the information, I can see, I would recommend week 3

There is such thing as phenotype, not each seed will represent strain traits. Ussually blue dreams grow tall and lanky in my gardens, so lst is a must, maybe toping even too, if your target is to get big even, flat canopy. Again, this strain can run in flower stretch, be wise with her...

Not sure what the strain has to do with topping. Generally recommended to wait until she has 3 or 4 internodes before she can be considered in veg stage. But you can top as early as you like, topping earlier might take a little longer to recover though so keep in mind. Guess it kinda depends on how much space you have to play with will dictate how ruthless you need to be with training to make most efficent use of space, especially with autos which are less forgiving to final yield whenever training has a recovery time attached.

Your diary does not show any pictures of the plant but has one pic uploaded in week 2 of a leaf symptom chart but not even the full chart just a snippet of the corner. Whats going on?? Top whenever you want, release it takes time to recover from that, normaly pp do their first top between the 3rd and 5th node of a seedlings.