Auto viking blue

i'd say more than safe to start, you have some deficiences, if you haven't fed yet. I'd look for those signs next time and jump it a bit. with an autoflower you don't want to start too soon. a toxicity is much worse than this. Only other thing to rule out is what you re-potted into. was it a 'hotter' soil? You have to consider what's in the soil, since it can contain an abundance of nutes. For exampl, if that's Fox Farm OF, i'd be a bit more careful about what i add. anyway, i think you have an honest-to-god Ca deficiency... as often as people think they have one, they often do not. If you think the soil is hot, just add some cal-mag or soemthing with calcium avaiable in it. cal-nitrate can work too... in future, i'd look into a soil amendment called "garden lime" it will help keep calcium levels up in your later in the grow.