On a whim I ordered some rhizomes; planning to drop them on a hill that has vigorous plant growth without watering. It's north facing, coastal, with some direct sunlight.
Asking for insight:
* what's a minimum depth for soil? It's 1 to 4 inches of hard-pack on clay, all needing rework to make loamy. Can I get by with 8 to 12 inches of depth?
* are hop vines trainable? I can set them up to go 16' tall, but I'd rather have them run horizontally after a 3 to 6 foot rise. Would it negatively affect the plant?
8-12 inches of rich welld drained loam will be okay, you will want to top dress every year so that will increase with time as well.
Some direct light is not great. They will take as much light as you can give them and will produce much better with more.
The bines are trainable and much prefer to go vertical. If you train them horizontal you will get less harvest but generally you get a lot anyway so it may be fine.