1st Grow Forbidden Runtz

I'm not familiar with this strain but I am familiar with the Fox Farm nutes... Yellow tips are a sign of too many nutes - and from your diary, if you're using a soil with it's own nutes, you're WAY overfeeding! Since you're not even in pre-flower, I'd cut out the bloom nutes (or at least cut out ALL the Tiger Bloom and knock back the Big Bloom to 1 tsp per gallon) and increase the Grow Big to 1 tsp per gallon. I don't know what Open Sesame is but if it's a bloom nute, get rid of it. I'd also get rid of the CalMag (max I would use here would be 1/2tsp per gallon and only once a week). I noticed your humidity level is pretty low... this might also be a contributing factor although not a big one - but try to get it up into the 50-60% range until you get into bloom... then it can be knocked back to 40-50... I'm more concerned, to be honest, with why you're not at least in pre-flower by now... Autos do their own thing (they don't depend on you "telling" them when to go into flower the way photos do... I'm going to lay everything down to massive overfeeding... they don't need it and honestly don't like it... Good luck!