plant hardiness zones

Question

I live in zone 9 in southern California. Why does the hardiness map only cover cold temperatures and not hot? It gets up to 110 F here and a lot of plants designed for full sun just don’t survive the summer. Are there flowers other than cactus and succulents that would work?

Answer 1

Yes, there are many perennials, vines and shrubs for you to grow in your warm zone 9 climate!
I would also suggest you check with your County Extension Office for a list of plants specific to your region.
I have listed a link to help you locate your nearest office and a few other links to help you.
https://www.gardeningknowhow.com/extension-search/

https://www.gardeningknowhow.com/special/xeriscape/growing-drought-tolerant-vines.htm
https://www.gardeningknowhow.com/ornamental/shrubs/plumbago/growing-plumbago-plants.htm
https://www.gardeningknowhow.com/ornamental/shrubs/princess-flower-bush/growing-princess-flower.htm
https://www.gardeningknowhow.com/ornamental/shrubs/ixora/growing-ixora-shrubs.htm
https://www.gardeningknowhow.com/ornamental/flowers/gazania/gazania-treasure-flowers.htm
https://www.gardeningknowhow.com/ornamental/flowers/angelonia/growing-angelonia-plants.htm