Divide shrubs?

thisbettyOctober 27, 2009

A skimmia shrub,about 9 beet tall, has multiple tall thick canes (6 or 7). Can I saw vertically thru a side cane junction -thru the root ball and remove a shrub for planting elsewhere?

I have read of people dividing mature shrubs with a saw and planting them all successfully, but I do not remember any details. Do you?

Thank you for reporting this comment. Undo
yiorges-z5il

do this late fall or early spring reduce top growth by 3/4

    Bookmark   October 28, 2009 at 2:15PM
Thank you for reporting this comment. Undo
brandon7 TN_zone(7)

I would base any top-growth removal on the relative amount of root I was able to retain on the division. Pruning top-growth may be necessary for initial survival on some poorly rooted divisions, but should not be necessary on better rooted divisions. Removal of top growth slows establishment (root growth) and should only be done if required.

    Bookmark   October 28, 2009 at 4:43PM
Thank you for reporting this comment. Undo
origami_master(5b)

removing top growth as compensation for root damage is no longer accepted to be as 'correct' as it used to be. top growth should only be removed so that the plant is stable (ie: won't be knocked over by wind catching the branches).

The reason why it's not accepted to be correct is because plants will abort top growth by themselves and pour their energy into root formation. It's a survival tactic sort of like when humans get too cold. We divert our blood (warmth) to our core body, and if the temperature keeps on dropping, we divert out blood into the brain. Excuse the comparison, but if humans were to 'freeze' our extremities would be a 'small sacracrifice' for lack of a better comparison compared to saving the core body/brain. In plant, you will notice that some top growth will die. In the case of the plant, the 'core' would be the roots (which are also capable of producing new top growth). The plant will need every possible photosynthesizing leaf to create food, and those that the plant doesn't need will wilt and die.

Second, when you cut/trim top growth, you no longer have one growing point, but two. Remember there are 'dormant' or inactive buds at the nodes. Once the top growth is cut, the energy normally sent to the single top shoot will be diverted (not always) equally to the dormant buds. That's why when we pinch annuals for a bushier plant. It actually takes the plant less energy to support one central shoot rather than a number of smaller breaking buds.

But do hear, it's not that pruning in proportion to root loss is totally wrong, because it was the accepted theory for quite some time. It's just that we keep on discovering better methods and techniques that the older accepted theories just fall out of place.

    Bookmark   October 29, 2009 at 4:25PM
Thank you for reporting this comment. Undo
thisbetty

Origami, I am really just trying to know if this shrub can be divided, I don't plan to trim the top growth. You seem to be knowledgeable, and I would very much like to know about dividing shrubs - like my Japanese cleyera (ternstroemia gymnanthera).

    Bookmark   November 23, 2009 at 5:55PM
Thank you for reporting this comment. Undo
calistoga_al

I thought your question was answered. Yes you can divide a shrub that has multiple canes, by simply splitting the crown and the roots and replanting. Late fall or early spring was suggested as the best time to do this. Al

    Bookmark   November 25, 2009 at 8:58AM
Thank you for reporting this comment. Undo
thisbetty

I am forever late. But thank you Al. I was looking for a guide, my books only refer to specific shrubs.

    Bookmark   January 16, 2010 at 3:27PM
Thank you for reporting this comment. Undo
flora_uk(SW UK 8/9)

Can I just ask a question? I've never come across a Skimmia 9 feet tall with canes. That's very impressive. The varieties of Skimmia japonica grown over here are generally branching and bushy and about 4 feet tall. They wouldn't be candidates for division, more for cuttings. This isn't a Kerria is it, rather than a Skimmia?

    Bookmark   February 2, 2010 at 8:28AM
Sign Up to comment
More Discussions
Flower buds growing and swelling on callery pear tree cuttings?
i took 12 cuttings of a pretty callery flowering pear...
tlbean2004
Can Budwood be too small, or thin?
When grafting should I try to obtain close to pencil...
figbear (8b coastal carolina)
Rooting hormone
Hormex is what we always had in the house, but I don't...
zensojourner
Clonex gel turned liquid
When my Clonex gel was about a year old and I went...
jbclem
Royal Poinciana Tree Grafting (Delonix Regia, Flamboyant)
Anyone out there have any experience grafting the Royal...
nsboyd1210
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™