My understanding is that Miracle-Gro is great to help plants start to grow fast, but that you should not use it for too long, because the roots don't develop at the same pace as the rest of the plant.

Challenge: About 40 Thuja bushes, currently 4 feet tall, 1 foot wide. Want to make them grow quickly. But don't want to "over use" Miracle-Gro.

Anyone know how much/how long is appropriate to use Miracle-Gro in this situation?

Thanks!