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Old 04-22-2015, 08:44 AM
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I just planted an Amur Maple and right now it's a shrub, about 2-3 feet tall. I want it to grow into a multiple trunk tree. When can I start pruning? (Now? Later this summer? Wait a year?) How much can I prune it? If I start at the bottom getting rid of the tiny branches I don't want, how far up should I go? Should I stop when I get a quarter of the way up the shrub? half-way? I really hope that makes sense. Also, how many trunks is best (structurally)? 3-4?

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Old 04-22-2015, 01:00 PM
Location: East of Seattle since 1992, originally from SF Bay Area
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The time to prune depends on what you want to do with it. For that tree, id you wanted it to be a shrub/hedge you would prune with shears during the growing season (now). In your case, I would wait until it's dormant, but after the coldest part of winter. You didn't give your hardiness zone, but here that would be about February/March. Every place you cut will put out new shoots, which you can then thin as needed, but major pruning now reduces the foliage needed for photosynthesis and increases the chances of disease and pests as the sap will ooze out. Don't try to do it all in one year. Choose the 3-4 main branches to keep, then remove about half of the small branches coming off of them. Do more the next year, and also prune any branches that are crossing each other. You will have tio use your judgement as to how many main branches to leave, the number and location depend on what directions they are going. Generally you want to avoid "bars" where branches are horizontal and opposite each other.
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Old 04-22-2015, 03:01 PM
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How to Prune Amur Maple

How to Prune Amur Maple | Garden Guides
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