Where do root-over-rock roots go?

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Where do root-over-rock roots go?

Post  63pmp on Sat Jul 10, 2010 8:54 am

When developing a root-over-rock composition, when the roots reach soil level, do the roots go outwards like a proper nebari, or do they dive straight into the mix?

Paul

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Re: Where do root-over-rock roots go?

Post  Billy M. Rhodes on Sat Jul 10, 2010 10:43 am

I think in most examples I have seen the roots went directly into the soil. The design purpose of nebari is to show the tree anchored to the earth, it also does that by wrapping the roots on the rock. I think a flared nebari on a root over rock planting would be redundent.

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Re: Where do root-over-rock roots go?

Post  JimLewis on Sat Jul 10, 2010 1:47 pm

I think Billy's right . . . however, I can envision a fig (for example) with its roots twining around a tall stone, then spreading out into the soil around the stone.

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Re: Where do root-over-rock roots go?

Post  63pmp on Sun Jul 11, 2010 10:41 am

Thanks for the replies. I've seen pictures of good root over rocks, but never seen one in the flesh, so to speak. The pictures don't give much indication about what happens at soil the level.

My problem Jim, and Billy, was that I can imagine both of your scenarios. I have seen roots growing down a rock and across the ground in a rain forest, and also seen them just disappear into the ground. Maybe its one of those not right, not wrong type of things, but depends on the composition.

Thanks again.

Paul

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Re: Where do root-over-rock roots go?

Post  JimLewis on Sun Jul 11, 2010 2:18 pm

My problem Jim, and Billy, was that I can imagine both of your scenarios.

Well then. That's your challenge, isn't it? To find a rock and a tree and to decide which of the "scenarios" (or another one entirely) would fit that tree and that rock.

Just any tree and any rock never works.

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Re: Where do root-over-rock roots go?

Post  Rob Kempinski on Mon Jul 12, 2010 7:18 pm

A good root spread on a tree at the rock soil interface would look good (even if it is redundant).

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