wayne fajkus wrote:I learned that zone 8's are very different depending on where you are located. Im in 8a and started thinking about what i would need to do to be a zone 9. Cold is the biggest hurdle to overcome. We may get 3 overnight freezes a year, then one year it stays below freezing down to 17 degrees for 3 straight days.
While things like elevated beds may save the plants from a short overnight freeze, how do you deal with 72 hours below freezing? I suspect that trumps any heat gains you get with water tanks, rocks, holes, etc. It won't last as long as needed.
Im not trying to be negative. I guess my question is how to handle multi day freezes. It seems the most crucial aspect of the OPs goals. If there are any solutions besides covering plants and trees, i would love to here them.
Theres a movement here in texas for olive trees. Im not exact on my numbers but it generally goes like this: olives take 7 years to fruit. In 5 years a freeze comes that kills the upper tree. The tree comes back from the roots, the seven year wait starts over. In 4 years a freeze comes.........