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Originally Posted by Aurelius
I can't see under what circumstances you would need to water for the sake of the core.
As I see it the core would always be the wettest part of the soil.
The core will more than likely be composed of dense clay. It will have the least amount of feeder roots and no evaporation to speak of.
It's just a trade-off. You have to water for the majority of the roots.
No?
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Areulius: I agree, I probably should have said water for the sake of the new roots. That is the real problem of an uneven soil mix. The core stays wet to the point of rot and the attempts to water the new soil and new roots are thwarted. In and open container like I have described this does not happen. I think the capilary action of the water draining from the new mix tends to draw a good deal of moisture out of the core. Regardless of what happens and or why, I have never had a rot or watering problem with my training planter.