Tana, magnolias are growing quite rapidly, 30-50 cm per year is a normal growth.
Of course, the first years of seedling grows more slowly, but then catch up. T e in 5 years we can expect 150-200 cm. I have seedlings for 4 years, about 150 cm, of course, if the magnolia is in extreme conditions, covered with ice, it was not up to growth. In Moscow, some types of magnolias over the winter be frozen whole annual increment, t e as a result they do not grow. So I am talking about species that can be grown.
For 10 years, from seed, seedlings will be that of a tree.
America-the birthplace of many magnolias, there are forests consist.
Everything that you are talking about dr.pione-normal. Something does not vporyadke-sick, the roots of someone gnawing on a thread, not the soil. You know that peonies need alkaline soil? otherwise rot. T e sypte each year in the spring under their ashes.
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