Stop at the various tourism offices in the towns you visit. You’ll be able to get the latest flower news and a map of the routes you can drive. You can also call beforehand to find out where the flowers are. Check the weather forecast using a reliable source like yr.no. If it’s overcast, the flowers won’t open fully. Flowers always turn towards the sun. For spectacular vistas, try to approach your chosen destination from the north, with the sun behind you.