high up in the mountains
The best climate to grow carrots in is a cool climate. This is the one they prefer. They grow well in loose soil and need plenty of water to thrive.
Nutmeg grows best in a tropical climate.
the best climate to grow peas is in the end of spring and the begging of summer.
Yams are best grown in a cool climate, they grow best in the mountains as the air is fresh and the soil full of nutrients.
Many of them grow in the Fraser Valley of British Columbia (and NO- It's NOT a state) .
A temperate climate. They like a winter.
The Heat
Not likely. Saffron is a Mediteranian Crop, and the Vikings lived in a much colder climate.
warm and humid conditions are best but in any climate it will survive!
cold
Syringa needs a cool or cold climate in which to grow.
I suppose you could. Saffron comes from a certain flower, the saffron crocus (Crocus sativus), and the little hairs (stigma) in the middle of the flower are saffron threads.