We live in the Algarve, Portugal. Mediterranean, winter- rain climate. USDA 10b as coldest temperatures we get. (1-5 Centigrade). Very hot in summer, 30C. Will Cleome (hassleriana?) Grow here happily? Thank you for your help.
Although, it will prefer a certain climate, it can also be considered quite invasive. Seeds are capable of surviving heavy freezes, and will re-emerge in Spring.
They will grow just about anywhere! This article will help: https://www.gardeningknowhow.com/ornamental/flowers/cleome/growing-cleomes.htm