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Miracle Grow Potting Soil

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BeckyH photos
Joined: 4/02/2007
Location: North Idaho
Posts: 6
Posted: Jun/15/2009 5:59 AM PST

Hello!

I'm a newbie here, and fairly new to gardening in the Northwest. Love this site.

We have very poor soil out here in North Idaho, and supplement with topsoil and Miracle Grow Potting Soil often. My question is, when using this brand, should I still add nutrients as usual? In other words, could I overfertilize/burn my plants if I supplement too early?

Thanks.
poeticpeony blog photos
Joined: 4/04/2006
Location: NE Ohio, deck chuckin' fool
Posts: 9437
Moderator
Posted: Jun/15/2009 6:25 AM PST

You're using it directly in the ground? If it's the kind with fertilizer additives I'd think after awhile it would leech out, but for the time period it's supposed to work I wouldn't add extra fertilizer. After it's broken down awhile and is just a soil amendment to loosen your dirt then it would probably be okay to add some fertilizers.
If it's just regular potting soil with no nutrients fertilizer would be a good idea if your plants look like they need it. Some things just need good soil to grow.
MamaBearBSA photos
Joined: 8/14/2002
Location: Altoona, Iowa (near Des Moines)
Posts: 4967
Moderator
Posted: Jun/15/2009 10:25 AM PST

Miracle grow used directly in the garden too often can cause salt build up. It is good in pots because the salts rinse out as the water drains out the bottom of the pot. In the garden directly though it takes a lot longer to leach out. To improve the soil it is much better to add compost, leaf mold, regular potting soil, straw mulch, gypsum, bone meal, things like this.
cougar blog photos
Joined: 8/24/2008
Location: Kentucky
Posts: 1184
Posted: Jun/15/2009 11:52 AM PST

You gals are good! I did not know that..hmmm
Although I dont do that myself, its nice to know.
poeticpeony blog photos
Joined: 4/04/2006
Location: NE Ohio, deck chuckin' fool
Posts: 9437
Moderator
Posted: Jun/15/2009 12:23 PM PST

Sure is. I would have thought it would dissolve faster in the ground. Thanks for the correction!
MamaBearBSA photos
Joined: 8/14/2002
Location: Altoona, Iowa (near Des Moines)
Posts: 4967
Moderator
Posted: Jun/15/2009 12:32 PM PST

Poe, that is really a common misconception. But I saw a story on Miracle Grow a while back and there is one of the chemicals they use in their fertilizer that breaks down into salt. (this same thing is in the cheaper water storing crystals) In a pot you tend to water heavy and this will flush out these salts. (have you ever noticed when you water pots that the water flushes out yellow/brown?) In the garden though it has to try and find a place to go. It will flush out eventually but it is slower. I'm not saying not to use Miracle Grow because it has it's time and place. Just be careful when and where you use it.
BeckyH photos
Joined: 4/02/2007
Location: North Idaho
Posts: 6
Posted: Jun/15/2009 6:05 PM PST

Thank you! Great information.
mudpies blog photos
Joined: 3/09/2009
Location: south central Ontario
Posts: 376
Posted: Jun/15/2009 7:26 PM PST

Amending your soil with potting soil must be very expensive! There are much cheaper alternatives, depending on what your soil is lacking. All soils benefit from compost and/or manure. Clay soil should be amended with sharp sand. Sowing various grasses and tilling them into the soil is very beneficial. Growing peas and/or beans sets nitrogen in the soil.
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