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pruning weeping butterfly bush

Posted by wangshan Z5 usa MW (My Page) on
Sat, Jun 5, 10 at 23:17

I am trying to get a 2 year old weeping butterfly bush to grow taller...the branches are so low they are on the ground..last year the main branch went basically horizontal about 5 feet and only at most 18 inches vertical. Here's a pic

Here is a link that might be useful: weeping too much


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RE: pruning weeping butterfly bush

You have to train B. alternifolia to a single trunk else it will form a huge mass just like like that, and plod upward in an ever-larger green mound. Training to single trunk (standard) involves staking and pruning and choosing when to do so, as it blooms on last year's wood and you'll lose the flowers when you start hacking. Sometimes staking is not necessary, but I suspect that plant needs it.

Dan


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RE: pruning weeping butterfly bush

  • Posted by bboy USDA 8 Sunset 5 WA (My Page) on
    Sun, Jun 6, 10 at 18:53

Looks like it might have been hard pruned already, which could be part of the problem. Otherwise, you just have to wait for it to mound up on its own. But not in that space, unless you make the bed bigger.


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RE: pruning weeping butterfly bush

I would go with Dan's suggestion.

Take the strongest, thickest, straightest branch and stake it up vertically. This will become the trunk of your weeping butterfly bush tree. Then prune back all of the other branches.

I know this sounds severe, but what you're doing is making a mini-weeping tree or what they call a standard. It'll eventually look like a shorter version of a weeping cherry.

You'll want to decide what height you want that one branch (trunk) to weep from and then just cut it at that height. It will sprout from there and those sprouts will form the weeping branches that will flower next year.

Keep in mind that for a few years, the main trunk will try to sprout along its length. You'll want to maintain the trunk by pruning these lower branches so that the shrub can focus all of its energy on developing the branches at the very top.

It'll also take a lot of energy and some time for the trunk to thicken.

Mine was doing great until the weight of the winter snow cracked the main branch (trunk). What a bummer. I should have done a better job of supporting the main branch on the stake.

Best of luck to you!


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