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Seed-starting soil mix question.

Posted: Wed Feb 03, 2021 3:00 pm
by Vanisle_BC
Last fall I bought a bag of Miracle-Gro potting soil and set it aside without paying attention to Its fertiliser profile: 21 - 0.11 - 0.16, effectively all nitrogen, intended for use with flowering plants(?)

I usually start seeds in soil blocks and small pots, in a sifted mix of commercial potting soil, peat moss and garden soil or compost. For potting-up veggies I'll want to add lots of bone meal & wood ash to whatever Miracle-Gro I use, but my question is this:

Will a nitrogen-heavy mix actually be a good thing for making strong young seedlings before giving them fertiliser more appropriate to 'adolescent' veggies?

Re: Seed-starting soil mix question.

Posted: Wed Feb 03, 2021 5:28 pm
by PaulF
The amount of nitrogen in the potting mix is very minute and has been safe for my seedlings. I add nothing extra unless the seedlings show signs of needing a boost.