I was figuring on mixing some up in advance, putting in bottles and watering my plants with it on the first of March.

I figure on doing it every two weeks and just using my usual watered down tea between those times.

Would that be too soon to start?

I start in the middle of May, going once a week...regular water dosage between miracle grow waterings...
I don't like to start that early because I continue with the miracle grow until the End of August, and usually everything gets to big..
That's just what I do...
Good luck!

I know some people really don't like MG, but I use it....I start in May too and use it once a week.

So the beginning of March is too early, then?

I don't use Miracle Grow on my perennials, but I do use it when I plant my annuals to give them a helping hand when getting started. Then I apply it about once a month.

Do you think March 1st is too early to start?

I'm mixing my first today - into a watering can, then into some bottles so I can water with it every two weeks.