RDWC Forbidden Runtz and Jack Herer

I saw little pistils so I guess its starting to flower probably due to stress or something or just its at that age but either way I had just given it a heavy dose of veg nutes so some nutrient lockout occurred which presented itself as splotching dead spots on some of the lower leaves and the roots turning dark, but not slimy. I drained the system and refilled with bloom nutes at half strength and they perked right up and the roots are lightening up and growing white tips now. I've never run autos before so I don't know if they go through "the stretch" when they start to flower but hopefully they'll get a bit bigger yet before they start to form buds. I have the light at 80% to have the temp at 78F so hopefully everythings dialed in here.