Miracle Grow is not the best, but not the worst, either. (at least for vegging)

If you get the growing conditions under control, you'll also nee to work on learning the nutrient end of growing cannabis...

I'd ease-up on the 1/2 strength Miracle Grow 24-8-16. That's way too much for an every other day feeding schedule. You may only be applying 250 ml, but all of those nutes sit in the top couple of inches of the pot, 'burning' the surface roots.

I used MG for years. 1/4 strength twice a week, and that's still a bit 'hot'. Are you at least adding freshly ph'd plain water between feedings? Expect to flush once a month or every 6 weeks to remove the salt build-up, or nutrient lock-out could eventually be fatal.

As with any nutrient or additive, you should always "sneak-up" on the upper limits, not start out there. :thumbsup: