Lignified cuttings spirea can rooting, since July. But this is usually done in the fall, in September - October. Then the cuttings will go under the snow, and they will not require watering and spraying, and in the spring roots grow.
But if it is necessary now, it is better to take the 'red cuttings "with photo.
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Each cutting should have 4-5 leaves.
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Lower leaves on the cuttings must be removed together with petioles.
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The rest of the leaves on each the cuttings must be cut in half.
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Soak cuttings for 10-12 hours in a solution to defenses cuttings.
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The lower part dipped in rooting powder.
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Landed cuttings in moist sand or light soil. Cuttings are arranged not vertically, but at an angle of about 30-45 °.
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Mist the cuttings from the sprinkler. While the warm weather to spray them once in 2-3 days.
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Close the container. Put in the shade under trees.
Before the advent of new shoots. You can put in the not container, and the soil immediately. I have a special bed of cuttings for the garden. "Kindergarten" is called.
If you do cuttings in late summer, it is necessary to take a photo with yellow. The lower part should lignified + cut green tops.
So I've seen the step to cut the remaining leaves by half in directions to propogate other plants too. What is the purpose?