Originally Posted by Raw710
Well I have used the same nutrients for quite a while and haven't had an issue but on the other hand I have never ran these new strains either....so maybe you are correct
Every strain is different. Branchier strains will use more K, strains that produce more resin will need more Si, etc.
What I've notice in my grows, is that when you use R/O water, plants do just fine through seedling stage, however as soon as flowering starts, you'll need more magnesium. And for the plant flowering starts as soon as the first pre-flowers show up.
And combine that with pots placed on a solid or concrete floor, especially in winter, lockout issues are added to that.
TIP: after the flowering is well under way and the buds are stacking, add an inch or two of medium, or (without touching the rootball) repot into a larger container (very easy with coco coir).
The reason is that the increase in space for root expansion at that point of development, you're going to see a crazy increase in budding.