KatJ75
User
 A Fertile Cocoon
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Re:Plants. Lush green but NO blooms? - 2006/05/11 11:48
I am in no way an expert, but the mix of castings to soil that I have seen have called for up to 20% castings in the mix. Usually lush green and no bloom equals too much nitrogen. I am not sure how much nitrogen is in the Miracle grow potting mix. The theory about castings is that the microorganisms and such make the nutrients more available for the plants. Soo if the Miracle grow soil has a lot of nitrogen, and the castings have made it into a form that the plants can use quicker and easier, then you have plants hopped up on nitrogen. I would recommend using the castings, maybe, in a soil that has less nitrogen then the Miracle grow soil. Or rather use potting soil with no fertilizer added, and add fertilizer just as needed.
Also, not 100% sure, but your Iris may not bloom this year. Did you start them from seed or cuttings? I have started them from seed in the past but they don't bloom until the second year, unless you start them in in the fall and grow them in the greenhouse over winter. Not sure what your other starts are.
Kat
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