Can Miracle Grow go bad?

Question

I have some powdered miracle grow that you mix with water. I have had it for many years, can this stuff go bad or can I still use it?

Answer 1

Fertilizer does not go bad. It's more like old vitamins in your medicine shelf. They may break down over time and be of a different chemical composition than when you bought it- especially if its exposed to sunlight or if it got wet. I will often have a bag overwinter and used it in the next spring with no adverse effects.

Answer 2

I really have no answer except to tell you this. I had some in my out door shed for 2 years it went thru Missouri heat and some pretty bad freezes. I used it this year and my plants took off like superman!
It appears that it didn't go bad.

Answer 3

Hmmm....I'm waiting to see the answer to this as I, too, have old Miracle Gro. I just assumed it would last forever and still use it! I'd think it would just get less potent and not harm the plants as well as not help.